ILGenerator.Emit Yöntem

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::Emit::LocalBuilder ^ local);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::Emit::LocalBuilder ^ local);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.Emit.LocalBuilder local);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.Emit.LocalBuilder local);

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.LocalBuilder -> unit
override this.Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.LocalBuilder -> unit

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.LocalBuilder -> unit

Public Overridable Sub Emit (opcode As OpCode, local As LocalBuilder)

Public MustOverride Sub Emit (opcode As OpCode, local As LocalBuilder)

Parametreler

Özel durumlar

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, Type ^ cls);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, Type ^ cls);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, Type cls);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, Type cls);

abstract member Emit : System.Reflection.Emit.OpCode * Type -> unit
override this.Emit : System.Reflection.Emit.OpCode * Type -> unit

abstract member Emit : System.Reflection.Emit.OpCode * Type -> unit

Public Overridable Sub Emit (opcode As OpCode, cls As Type)

Public MustOverride Sub Emit (opcode As OpCode, cls As Type)

Parametreler

Özel durumlar

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır. konumu cls kaydedilir, böylece modülü taşınabilir bir yürütülebilir dosyada (PE) kalıcı hale getirmek için gerekirse belirtece düzeltme eki uygulanabilir.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, System::String ^ str);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, System::String ^ str);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, string str);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, string str);

abstract member Emit : System.Reflection.Emit.OpCode * string -> unit
override this.Emit : System.Reflection.Emit.OpCode * string -> unit

abstract member Emit : System.Reflection.Emit.OpCode * string -> unit

Public Overridable Sub Emit (opcode As OpCode, str As String)

Public MustOverride Sub Emit (opcode As OpCode, str As String)

Parametreler

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır. str Modülün taşınabilir bir yürütülebilir dosyada (PE) kalıcı olması durumunda konumu gelecekteki düzeltmeler için kaydedilir.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, float arg);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, float arg);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, float arg);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, float arg);

abstract member Emit : System.Reflection.Emit.OpCode * single -> unit
override this.Emit : System.Reflection.Emit.OpCode * single -> unit

abstract member Emit : System.Reflection.Emit.OpCode * single -> unit

Public Overridable Sub Emit (opcode As OpCode, arg As Single)

Public MustOverride Sub Emit (opcode As OpCode, arg As Single)

Parametreler

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 void Emit(System::Reflection::Emit::OpCode opcode, System::SByte arg);

[System.CLSCompliant(false)]
public void Emit (System.Reflection.Emit.OpCode opcode, sbyte arg);

[<System.CLSCompliant(false)>]
member this.Emit : System.Reflection.Emit.OpCode * sbyte -> unit

Public Sub Emit (opcode As OpCode, arg As SByte)

Parametreler

Öznitelikler

CLSCompliantAttribute

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::MethodInfo ^ meth);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::MethodInfo ^ meth);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.MethodInfo meth);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.MethodInfo meth);

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.MethodInfo -> unit
override this.Emit : System.Reflection.Emit.OpCode * System.Reflection.MethodInfo -> unit

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.MethodInfo -> unit

Public Overridable Sub Emit (opcode As OpCode, meth As MethodInfo)

Public MustOverride Sub Emit (opcode As OpCode, meth As MethodInfo)

Parametreler

Özel durumlar

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

konumu meth kaydedilir, böylece modül taşınabilir bir yürütülebilir dosyada (PE) kalıcı hale geldiğinde yönerge akışına düzeltme eki uygulanabilir.

Genel meth bir yöntemi temsil ediyorsanız, genel bir yöntem tanımı olmalıdır. Yani, MethodInfo.IsGenericMethodDefinition özelliği olmalıdır true.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::Emit::SignatureHelper ^ signature);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::Emit::SignatureHelper ^ signature);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.Emit.SignatureHelper signature);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.Emit.SignatureHelper signature);

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.SignatureHelper -> unit
override this.Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.SignatureHelper -> unit

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.SignatureHelper -> unit

Public Overridable Sub Emit (opcode As OpCode, signature As SignatureHelper)

Public MustOverride Sub Emit (opcode As OpCode, signature As SignatureHelper)

Parametreler

Özel durumlar

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, cli::array <System::Reflection::Emit::Label> ^ labels);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, cli::array <System::Reflection::Emit::Label> ^ labels);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.Emit.Label[] labels);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.Emit.Label[] labels);

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.Label[] -> unit
override this.Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.Label[] -> unit

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.Label[] -> unit

Public Overridable Sub Emit (opcode As OpCode, labels As Label())

Public MustOverride Sub Emit (opcode As OpCode, labels As Label())

Parametreler

Özel durumlar

Örnekler

Aşağıdaki kod örneği, atlama tablosuyla dinamik yöntem oluşturmayı göstermektedir. Atlama tablosu bir dizisi Labelkullanılarak oluşturulur.

using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
Type^ BuildMyType()
{
   AppDomain^ myDomain = Thread::GetDomain();
   AssemblyName^ myAsmName = gcnew AssemblyName;
   myAsmName->Name = "MyDynamicAssembly";
   AssemblyBuilder^ myAsmBuilder = myDomain->DefineDynamicAssembly( myAsmName, AssemblyBuilderAccess::Run );
   ModuleBuilder^ myModBuilder = myAsmBuilder->DefineDynamicModule( "MyJumpTableDemo" );
   TypeBuilder^ myTypeBuilder = myModBuilder->DefineType( "JumpTableDemo", TypeAttributes::Public );
   array<Type^>^temp0 = {int::typeid};
   MethodBuilder^ myMthdBuilder = myTypeBuilder->DefineMethod( "SwitchMe", static_cast<MethodAttributes>(MethodAttributes::Public | MethodAttributes::Static), String::typeid, temp0 );
   ILGenerator^ myIL = myMthdBuilder->GetILGenerator();
   Label defaultCase = myIL->DefineLabel();
   Label endOfMethod = myIL->DefineLabel();
   
   // We are initializing our jump table. Note that the labels
   // will be placed later using the MarkLabel method.
   array<Label>^jumpTable = gcnew array<Label>(5);
   jumpTable[ 0 ] = myIL->DefineLabel();
   jumpTable[ 1 ] = myIL->DefineLabel();
   jumpTable[ 2 ] = myIL->DefineLabel();
   jumpTable[ 3 ] = myIL->DefineLabel();
   jumpTable[ 4 ] = myIL->DefineLabel();
   
   // arg0, the number we passed, is pushed onto the stack.
   // In this case, due to the design of the code sample,
   // the value pushed onto the stack happens to match the
   // index of the label (in IL terms, the index of the offset
   // in the jump table). If this is not the case, such as
   // when switching based on non-integer values, rules for the correspondence
   // between the possible case values and each index of the offsets
   // must be established outside of the ILGenerator::Emit calls,
   // much as a compiler would.
   myIL->Emit( OpCodes::Ldarg_0 );
   myIL->Emit( OpCodes::Switch, jumpTable );
   
   // Branch on default case
   myIL->Emit( OpCodes::Br_S, defaultCase );
   
   // Case arg0 = 0
   myIL->MarkLabel( jumpTable[ 0 ] );
   myIL->Emit( OpCodes::Ldstr, "are no bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 1
   myIL->MarkLabel( jumpTable[ 1 ] );
   myIL->Emit( OpCodes::Ldstr, "is one banana" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 2
   myIL->MarkLabel( jumpTable[ 2 ] );
   myIL->Emit( OpCodes::Ldstr, "are two bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 3
   myIL->MarkLabel( jumpTable[ 3 ] );
   myIL->Emit( OpCodes::Ldstr, "are three bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 4
   myIL->MarkLabel( jumpTable[ 4 ] );
   myIL->Emit( OpCodes::Ldstr, "are four bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Default case
   myIL->MarkLabel( defaultCase );
   myIL->Emit( OpCodes::Ldstr, "are many bananas" );
   myIL->MarkLabel( endOfMethod );
   myIL->Emit( OpCodes::Ret );
   return myTypeBuilder->CreateType();
}

int main()
{
   Type^ myType = BuildMyType();
   Console::Write( "Enter an integer between 0 and 5: " );
   int theValue = Convert::ToInt32( Console::ReadLine() );
   Console::WriteLine( "---" );
   Object^ myInstance = Activator::CreateInstance( myType, gcnew array<Object^>(0) );
   array<Object^>^temp1 = {theValue};
   Console::WriteLine( "Yes, there {0} today!", myType->InvokeMember( "SwitchMe", BindingFlags::InvokeMethod, nullptr, myInstance, temp1 ) );
}

using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;

class DynamicJumpTableDemo
{
   public static Type BuildMyType()
   {
    AppDomain myDomain = Thread.GetDomain();
    AssemblyName myAsmName = new AssemblyName();
    myAsmName.Name = "MyDynamicAssembly";

    AssemblyBuilder myAsmBuilder = myDomain.DefineDynamicAssembly(
                        myAsmName,
                        AssemblyBuilderAccess.Run);
    ModuleBuilder myModBuilder = myAsmBuilder.DefineDynamicModule(
                        "MyJumpTableDemo");

    TypeBuilder myTypeBuilder = myModBuilder.DefineType("JumpTableDemo",
                            TypeAttributes.Public);
    MethodBuilder myMthdBuilder = myTypeBuilder.DefineMethod("SwitchMe",
                             MethodAttributes.Public |
                             MethodAttributes.Static,
                                             typeof(string),
                                             new Type[] {typeof(int)});

    ILGenerator myIL = myMthdBuilder.GetILGenerator();

    Label defaultCase = myIL.DefineLabel();	
    Label endOfMethod = myIL.DefineLabel();	

    // We are initializing our jump table. Note that the labels
    // will be placed later using the MarkLabel method.

    Label[] jumpTable = new Label[] { myIL.DefineLabel(),
                      myIL.DefineLabel(),
                      myIL.DefineLabel(),
                      myIL.DefineLabel(),
                      myIL.DefineLabel() };

    // arg0, the number we passed, is pushed onto the stack.
    // In this case, due to the design of the code sample,
    // the value pushed onto the stack happens to match the
    // index of the label (in IL terms, the index of the offset
    // in the jump table). If this is not the case, such as
    // when switching based on non-integer values, rules for the correspondence
    // between the possible case values and each index of the offsets
    // must be established outside of the ILGenerator.Emit calls,
    // much as a compiler would.

    myIL.Emit(OpCodes.Ldarg_0);
    myIL.Emit(OpCodes.Switch, jumpTable);
    
    // Branch on default case
    myIL.Emit(OpCodes.Br_S, defaultCase);

    // Case arg0 = 0
    myIL.MarkLabel(jumpTable[0]);
    myIL.Emit(OpCodes.Ldstr, "are no bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 1
    myIL.MarkLabel(jumpTable[1]);
    myIL.Emit(OpCodes.Ldstr, "is one banana");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 2
    myIL.MarkLabel(jumpTable[2]);
    myIL.Emit(OpCodes.Ldstr, "are two bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 3
    myIL.MarkLabel(jumpTable[3]);
    myIL.Emit(OpCodes.Ldstr, "are three bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 4
    myIL.MarkLabel(jumpTable[4]);
    myIL.Emit(OpCodes.Ldstr, "are four bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Default case
    myIL.MarkLabel(defaultCase);
    myIL.Emit(OpCodes.Ldstr, "are many bananas");

    myIL.MarkLabel(endOfMethod);
    myIL.Emit(OpCodes.Ret);
    
    return myTypeBuilder.CreateType();
   }

   public static void Main()
   {
    Type myType = BuildMyType();
    
    Console.Write("Enter an integer between 0 and 5: ");
    int theValue = Convert.ToInt32(Console.ReadLine());

    Console.WriteLine("---");
    Object myInstance = Activator.CreateInstance(myType, new object[0]);	
    Console.WriteLine("Yes, there {0} today!", myType.InvokeMember("SwitchMe",
                               BindingFlags.InvokeMethod,
                               null,
                               myInstance,
                               new object[] {theValue}));
   }
}

Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit

 _

Class DynamicJumpTableDemo
   
   Public Shared Function BuildMyType() As Type

      Dim myDomain As AppDomain = Thread.GetDomain()
      Dim myAsmName As New AssemblyName()
      myAsmName.Name = "MyDynamicAssembly"
      
      Dim myAsmBuilder As AssemblyBuilder = myDomain.DefineDynamicAssembly(myAsmName, _
                            AssemblyBuilderAccess.Run)
      Dim myModBuilder As ModuleBuilder = myAsmBuilder.DefineDynamicModule("MyJumpTableDemo")
      
      Dim myTypeBuilder As TypeBuilder = myModBuilder.DefineType("JumpTableDemo", _
                                 TypeAttributes.Public)
      Dim myMthdBuilder As MethodBuilder = myTypeBuilder.DefineMethod("SwitchMe", _
                        MethodAttributes.Public Or MethodAttributes.Static, _
                        GetType(String), New Type() {GetType(Integer)})
      
      Dim myIL As ILGenerator = myMthdBuilder.GetILGenerator()
      
      Dim defaultCase As Label = myIL.DefineLabel()
      Dim endOfMethod As Label = myIL.DefineLabel()
      
      ' We are initializing our jump table. Note that the labels
      ' will be placed later using the MarkLabel method. 

      Dim jumpTable() As Label = {myIL.DefineLabel(), _
                  myIL.DefineLabel(), _
                  myIL.DefineLabel(), _
                  myIL.DefineLabel(), _
                  myIL.DefineLabel()}
      
      ' arg0, the number we passed, is pushed onto the stack.
      ' In this case, due to the design of the code sample,
      ' the value pushed onto the stack happens to match the
      ' index of the label (in IL terms, the index of the offset
      ' in the jump table). If this is not the case, such as
      ' when switching based on non-integer values, rules for the correspondence
      ' between the possible case values and each index of the offsets
      ' must be established outside of the ILGenerator.Emit calls,
      ' much as a compiler would.

      myIL.Emit(OpCodes.Ldarg_0)
      myIL.Emit(OpCodes.Switch, jumpTable)
      
      ' Branch on default case
      myIL.Emit(OpCodes.Br_S, defaultCase)
      
      ' Case arg0 = 0
      myIL.MarkLabel(jumpTable(0))
      myIL.Emit(OpCodes.Ldstr, "are no bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 1
      myIL.MarkLabel(jumpTable(1))
      myIL.Emit(OpCodes.Ldstr, "is one banana")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 2
      myIL.MarkLabel(jumpTable(2))
      myIL.Emit(OpCodes.Ldstr, "are two bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 3
      myIL.MarkLabel(jumpTable(3))
      myIL.Emit(OpCodes.Ldstr, "are three bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 4
      myIL.MarkLabel(jumpTable(4))
      myIL.Emit(OpCodes.Ldstr, "are four bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Default case
      myIL.MarkLabel(defaultCase)
      myIL.Emit(OpCodes.Ldstr, "are many bananas")
      
      myIL.MarkLabel(endOfMethod)
      myIL.Emit(OpCodes.Ret)
      
      Return myTypeBuilder.CreateType()

   End Function 'BuildMyType
    
   
   Public Shared Sub Main()

      Dim myType As Type = BuildMyType()
      
      Console.Write("Enter an integer between 0 and 5: ")
      Dim theValue As Integer = Convert.ToInt32(Console.ReadLine())
      
      Console.WriteLine("---")
      Dim myInstance As [Object] = Activator.CreateInstance(myType, New Object() {})
      Console.WriteLine("Yes, there {0} today!", myType.InvokeMember("SwitchMe", _
                         BindingFlags.InvokeMethod, Nothing, _
                             myInstance, New Object() {theValue}))

   End Sub

End Class

Açıklamalar

Bir switch tablosu yayar.

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Etiketler kullanılarak DefineLabel oluşturulur ve akış içindeki konumları kullanılarak MarkLabeldüzeltilir. Tek baytlık yönerge kullanılırsa etiket, akış boyunca en fazla 127 baytlık bir atlamayı temsil edebilir. opcode bir dal yönergesi temsil etmelidir. Dallar göreli yönergeler olduğundan, label düzeltme işlemi sırasında dallara doğru uzaklık ile değiştirilir.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::FieldInfo ^ field);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::FieldInfo ^ field);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.FieldInfo field);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.FieldInfo field);

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.FieldInfo -> unit
override this.Emit : System.Reflection.Emit.OpCode * System.Reflection.FieldInfo -> unit

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.FieldInfo -> unit

Public Overridable Sub Emit (opcode As OpCode, field As FieldInfo)

Public MustOverride Sub Emit (opcode As OpCode, field As FieldInfo)

Parametreler

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır. konumu field kaydedilir, böylece modül taşınabilir bir yürütülebilir dosyada (PE) kalıcı hale geldiğinde yönerge akışına düzeltme eki uygulanabilir.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::ConstructorInfo ^ con);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::ConstructorInfo ^ con);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.ConstructorInfo con);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.ConstructorInfo con);

[System.Runtime.InteropServices.ComVisible(true)]
public virtual void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.ConstructorInfo con);

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.ConstructorInfo -> unit
override this.Emit : System.Reflection.Emit.OpCode * System.Reflection.ConstructorInfo -> unit

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.ConstructorInfo -> unit

[<System.Runtime.InteropServices.ComVisible(true)>]
abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.ConstructorInfo -> unit
override this.Emit : System.Reflection.Emit.OpCode * System.Reflection.ConstructorInfo -> unit

Public Overridable Sub Emit (opcode As OpCode, con As ConstructorInfo)

Public MustOverride Sub Emit (opcode As OpCode, con As ConstructorInfo)

Parametreler

Öznitelikler

ComVisibleAttribute

Özel durumlar

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

konumu con kaydedilir, böylece modül taşınabilir bir yürütülebilir dosyada (PE) kalıcı hale geldiğinde yönerge akışına düzeltme eki uygulanabilir.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, long arg);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, long arg);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, long arg);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, long arg);

abstract member Emit : System.Reflection.Emit.OpCode * int64 -> unit
override this.Emit : System.Reflection.Emit.OpCode * int64 -> unit

abstract member Emit : System.Reflection.Emit.OpCode * int64 -> unit

Public Overridable Sub Emit (opcode As OpCode, arg As Long)

Public MustOverride Sub Emit (opcode As OpCode, arg As Long)

Parametreler

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, int arg);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, int arg);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, int arg);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, int arg);

abstract member Emit : System.Reflection.Emit.OpCode * int -> unit
override this.Emit : System.Reflection.Emit.OpCode * int -> unit

abstract member Emit : System.Reflection.Emit.OpCode * int -> unit

Public Overridable Sub Emit (opcode As OpCode, arg As Integer)

Public MustOverride Sub Emit (opcode As OpCode, arg As Integer)

Parametreler

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, short arg);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, short arg);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, short arg);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, short arg);

abstract member Emit : System.Reflection.Emit.OpCode * int16 -> unit
override this.Emit : System.Reflection.Emit.OpCode * int16 -> unit

abstract member Emit : System.Reflection.Emit.OpCode * int16 -> unit

Public Overridable Sub Emit (opcode As OpCode, arg As Short)

Public MustOverride Sub Emit (opcode As OpCode, arg As Short)

Parametreler

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, double arg);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, double arg);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, double arg);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, double arg);

abstract member Emit : System.Reflection.Emit.OpCode * double -> unit
override this.Emit : System.Reflection.Emit.OpCode * double -> unit

abstract member Emit : System.Reflection.Emit.OpCode * double -> unit

Public Overridable Sub Emit (opcode As OpCode, arg As Double)

Public MustOverride Sub Emit (opcode As OpCode, arg As Double)

Parametreler

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, System::Byte arg);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, System::Byte arg);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, byte arg);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, byte arg);

abstract member Emit : System.Reflection.Emit.OpCode * byte -> unit
override this.Emit : System.Reflection.Emit.OpCode * byte -> unit

abstract member Emit : System.Reflection.Emit.OpCode * byte -> unit

Public Overridable Sub Emit (opcode As OpCode, arg As Byte)

Public MustOverride Sub Emit (opcode As OpCode, arg As Byte)

Parametreler

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode);

public virtual void Emit (System.Reflection.Emit.OpCode opcode);

public abstract void Emit (System.Reflection.Emit.OpCode opcode);

abstract member Emit : System.Reflection.Emit.OpCode -> unit
override this.Emit : System.Reflection.Emit.OpCode -> unit

abstract member Emit : System.Reflection.Emit.OpCode -> unit

Public Overridable Sub Emit (opcode As OpCode)

Public MustOverride Sub Emit (opcode As OpCode)

Parametreler

Örnekler

Aşağıdaki kod örneği, Emit bir örneği aracılığıyla MSIL çıkışı oluşturmak için uygulamasının ILGeneratorkullanımını gösterir.

using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
Type^ BuildMyType()
{
   AppDomain^ myDomain = Thread::GetDomain();
   AssemblyName^ myAsmName = gcnew AssemblyName;
   myAsmName->Name = "MyDynamicAssembly";
   AssemblyBuilder^ myAsmBuilder = myDomain->DefineDynamicAssembly( myAsmName, AssemblyBuilderAccess::Run );
   ModuleBuilder^ myModBuilder = myAsmBuilder->DefineDynamicModule( "MyJumpTableDemo" );
   TypeBuilder^ myTypeBuilder = myModBuilder->DefineType( "JumpTableDemo", TypeAttributes::Public );
   array<Type^>^temp0 = {int::typeid};
   MethodBuilder^ myMthdBuilder = myTypeBuilder->DefineMethod( "SwitchMe", static_cast<MethodAttributes>(MethodAttributes::Public | MethodAttributes::Static), String::typeid, temp0 );
   ILGenerator^ myIL = myMthdBuilder->GetILGenerator();
   Label defaultCase = myIL->DefineLabel();
   Label endOfMethod = myIL->DefineLabel();
   
   // We are initializing our jump table. Note that the labels
   // will be placed later using the MarkLabel method.
   array<Label>^jumpTable = gcnew array<Label>(5);
   jumpTable[ 0 ] = myIL->DefineLabel();
   jumpTable[ 1 ] = myIL->DefineLabel();
   jumpTable[ 2 ] = myIL->DefineLabel();
   jumpTable[ 3 ] = myIL->DefineLabel();
   jumpTable[ 4 ] = myIL->DefineLabel();
   
   // arg0, the number we passed, is pushed onto the stack.
   // In this case, due to the design of the code sample,
   // the value pushed onto the stack happens to match the
   // index of the label (in IL terms, the index of the offset
   // in the jump table). If this is not the case, such as
   // when switching based on non-integer values, rules for the correspondence
   // between the possible case values and each index of the offsets
   // must be established outside of the ILGenerator::Emit calls,
   // much as a compiler would.
   myIL->Emit( OpCodes::Ldarg_0 );
   myIL->Emit( OpCodes::Switch, jumpTable );
   
   // Branch on default case
   myIL->Emit( OpCodes::Br_S, defaultCase );
   
   // Case arg0 = 0
   myIL->MarkLabel( jumpTable[ 0 ] );
   myIL->Emit( OpCodes::Ldstr, "are no bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 1
   myIL->MarkLabel( jumpTable[ 1 ] );
   myIL->Emit( OpCodes::Ldstr, "is one banana" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 2
   myIL->MarkLabel( jumpTable[ 2 ] );
   myIL->Emit( OpCodes::Ldstr, "are two bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 3
   myIL->MarkLabel( jumpTable[ 3 ] );
   myIL->Emit( OpCodes::Ldstr, "are three bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 4
   myIL->MarkLabel( jumpTable[ 4 ] );
   myIL->Emit( OpCodes::Ldstr, "are four bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Default case
   myIL->MarkLabel( defaultCase );
   myIL->Emit( OpCodes::Ldstr, "are many bananas" );
   myIL->MarkLabel( endOfMethod );
   myIL->Emit( OpCodes::Ret );
   return myTypeBuilder->CreateType();
}

int main()
{
   Type^ myType = BuildMyType();
   Console::Write( "Enter an integer between 0 and 5: " );
   int theValue = Convert::ToInt32( Console::ReadLine() );
   Console::WriteLine( "---" );
   Object^ myInstance = Activator::CreateInstance( myType, gcnew array<Object^>(0) );
   array<Object^>^temp1 = {theValue};
   Console::WriteLine( "Yes, there {0} today!", myType->InvokeMember( "SwitchMe", BindingFlags::InvokeMethod, nullptr, myInstance, temp1 ) );
}

using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;

class DynamicJumpTableDemo
{
   public static Type BuildMyType()
   {
    AppDomain myDomain = Thread.GetDomain();
    AssemblyName myAsmName = new AssemblyName();
    myAsmName.Name = "MyDynamicAssembly";

    AssemblyBuilder myAsmBuilder = myDomain.DefineDynamicAssembly(
                        myAsmName,
                        AssemblyBuilderAccess.Run);
    ModuleBuilder myModBuilder = myAsmBuilder.DefineDynamicModule(
                        "MyJumpTableDemo");

    TypeBuilder myTypeBuilder = myModBuilder.DefineType("JumpTableDemo",
                            TypeAttributes.Public);
    MethodBuilder myMthdBuilder = myTypeBuilder.DefineMethod("SwitchMe",
                             MethodAttributes.Public |
                             MethodAttributes.Static,
                                             typeof(string),
                                             new Type[] {typeof(int)});

    ILGenerator myIL = myMthdBuilder.GetILGenerator();

    Label defaultCase = myIL.DefineLabel();	
    Label endOfMethod = myIL.DefineLabel();	

    // We are initializing our jump table. Note that the labels
    // will be placed later using the MarkLabel method.

    Label[] jumpTable = new Label[] { myIL.DefineLabel(),
                      myIL.DefineLabel(),
                      myIL.DefineLabel(),
                      myIL.DefineLabel(),
                      myIL.DefineLabel() };

    // arg0, the number we passed, is pushed onto the stack.
    // In this case, due to the design of the code sample,
    // the value pushed onto the stack happens to match the
    // index of the label (in IL terms, the index of the offset
    // in the jump table). If this is not the case, such as
    // when switching based on non-integer values, rules for the correspondence
    // between the possible case values and each index of the offsets
    // must be established outside of the ILGenerator.Emit calls,
    // much as a compiler would.

    myIL.Emit(OpCodes.Ldarg_0);
    myIL.Emit(OpCodes.Switch, jumpTable);
    
    // Branch on default case
    myIL.Emit(OpCodes.Br_S, defaultCase);

    // Case arg0 = 0
    myIL.MarkLabel(jumpTable[0]);
    myIL.Emit(OpCodes.Ldstr, "are no bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 1
    myIL.MarkLabel(jumpTable[1]);
    myIL.Emit(OpCodes.Ldstr, "is one banana");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 2
    myIL.MarkLabel(jumpTable[2]);
    myIL.Emit(OpCodes.Ldstr, "are two bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 3
    myIL.MarkLabel(jumpTable[3]);
    myIL.Emit(OpCodes.Ldstr, "are three bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 4
    myIL.MarkLabel(jumpTable[4]);
    myIL.Emit(OpCodes.Ldstr, "are four bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Default case
    myIL.MarkLabel(defaultCase);
    myIL.Emit(OpCodes.Ldstr, "are many bananas");

    myIL.MarkLabel(endOfMethod);
    myIL.Emit(OpCodes.Ret);
    
    return myTypeBuilder.CreateType();
   }

   public static void Main()
   {
    Type myType = BuildMyType();
    
    Console.Write("Enter an integer between 0 and 5: ");
    int theValue = Convert.ToInt32(Console.ReadLine());

    Console.WriteLine("---");
    Object myInstance = Activator.CreateInstance(myType, new object[0]);	
    Console.WriteLine("Yes, there {0} today!", myType.InvokeMember("SwitchMe",
                               BindingFlags.InvokeMethod,
                               null,
                               myInstance,
                               new object[] {theValue}));
   }
}

Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit

 _

Class DynamicJumpTableDemo
   
   Public Shared Function BuildMyType() As Type

      Dim myDomain As AppDomain = Thread.GetDomain()
      Dim myAsmName As New AssemblyName()
      myAsmName.Name = "MyDynamicAssembly"
      
      Dim myAsmBuilder As AssemblyBuilder = myDomain.DefineDynamicAssembly(myAsmName, _
                            AssemblyBuilderAccess.Run)
      Dim myModBuilder As ModuleBuilder = myAsmBuilder.DefineDynamicModule("MyJumpTableDemo")
      
      Dim myTypeBuilder As TypeBuilder = myModBuilder.DefineType("JumpTableDemo", _
                                 TypeAttributes.Public)
      Dim myMthdBuilder As MethodBuilder = myTypeBuilder.DefineMethod("SwitchMe", _
                        MethodAttributes.Public Or MethodAttributes.Static, _
                        GetType(String), New Type() {GetType(Integer)})
      
      Dim myIL As ILGenerator = myMthdBuilder.GetILGenerator()
      
      Dim defaultCase As Label = myIL.DefineLabel()
      Dim endOfMethod As Label = myIL.DefineLabel()
      
      ' We are initializing our jump table. Note that the labels
      ' will be placed later using the MarkLabel method. 

      Dim jumpTable() As Label = {myIL.DefineLabel(), _
                  myIL.DefineLabel(), _
                  myIL.DefineLabel(), _
                  myIL.DefineLabel(), _
                  myIL.DefineLabel()}
      
      ' arg0, the number we passed, is pushed onto the stack.
      ' In this case, due to the design of the code sample,
      ' the value pushed onto the stack happens to match the
      ' index of the label (in IL terms, the index of the offset
      ' in the jump table). If this is not the case, such as
      ' when switching based on non-integer values, rules for the correspondence
      ' between the possible case values and each index of the offsets
      ' must be established outside of the ILGenerator.Emit calls,
      ' much as a compiler would.

      myIL.Emit(OpCodes.Ldarg_0)
      myIL.Emit(OpCodes.Switch, jumpTable)
      
      ' Branch on default case
      myIL.Emit(OpCodes.Br_S, defaultCase)
      
      ' Case arg0 = 0
      myIL.MarkLabel(jumpTable(0))
      myIL.Emit(OpCodes.Ldstr, "are no bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 1
      myIL.MarkLabel(jumpTable(1))
      myIL.Emit(OpCodes.Ldstr, "is one banana")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 2
      myIL.MarkLabel(jumpTable(2))
      myIL.Emit(OpCodes.Ldstr, "are two bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 3
      myIL.MarkLabel(jumpTable(3))
      myIL.Emit(OpCodes.Ldstr, "are three bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 4
      myIL.MarkLabel(jumpTable(4))
      myIL.Emit(OpCodes.Ldstr, "are four bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Default case
      myIL.MarkLabel(defaultCase)
      myIL.Emit(OpCodes.Ldstr, "are many bananas")
      
      myIL.MarkLabel(endOfMethod)
      myIL.Emit(OpCodes.Ret)
      
      Return myTypeBuilder.CreateType()

   End Function 'BuildMyType
    
   
   Public Shared Sub Main()

      Dim myType As Type = BuildMyType()
      
      Console.Write("Enter an integer between 0 and 5: ")
      Dim theValue As Integer = Convert.ToInt32(Console.ReadLine())
      
      Console.WriteLine("---")
      Dim myInstance As [Object] = Activator.CreateInstance(myType, New Object() {})
      Console.WriteLine("Yes, there {0} today!", myType.InvokeMember("SwitchMe", _
                         BindingFlags.InvokeMethod, Nothing, _
                             myInstance, New Object() {theValue}))

   End Sub

End Class

Açıklamalar

opcode Parametre bir bağımsız değişken gerektiriyorsa, çağıranın bağımsız değişken uzunluğunun bildirilen parametrenin uzunluğuyla eşleştiğinden emin olması gerekir. Aksi takdirde sonuçlar tahmin edilemez. Örneğin, Yay yönergesi 2 baytlık bir işlenen gerektiriyorsa ve çağıran 4 baytlık bir işlenen sağlarsa, çalışma zamanı yönerge akışına iki ek bayt yayar. Bu ek baytlar yönergeler olacaktır Nop .

Yönerge değerleri içinde OpCodestanımlanır.

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

Kaynak:

ILGenerator.cs

public:
 virtual void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::Emit::Label label);

public:
 abstract void Emit(System::Reflection::Emit::OpCode opcode, System::Reflection::Emit::Label label);

public virtual void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.Emit.Label label);

public abstract void Emit (System.Reflection.Emit.OpCode opcode, System.Reflection.Emit.Label label);

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.Label -> unit
override this.Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.Label -> unit

abstract member Emit : System.Reflection.Emit.OpCode * System.Reflection.Emit.Label -> unit

Public Overridable Sub Emit (opcode As OpCode, label As Label)

Public MustOverride Sub Emit (opcode As OpCode, label As Label)

Parametreler

Örnekler

Aşağıdaki kod örneği, atlama tablosuyla dinamik yöntem oluşturmayı göstermektedir. Atlama tablosu bir dizisi Labelkullanılarak oluşturulur.

using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
Type^ BuildMyType()
{
   AppDomain^ myDomain = Thread::GetDomain();
   AssemblyName^ myAsmName = gcnew AssemblyName;
   myAsmName->Name = "MyDynamicAssembly";
   AssemblyBuilder^ myAsmBuilder = myDomain->DefineDynamicAssembly( myAsmName, AssemblyBuilderAccess::Run );
   ModuleBuilder^ myModBuilder = myAsmBuilder->DefineDynamicModule( "MyJumpTableDemo" );
   TypeBuilder^ myTypeBuilder = myModBuilder->DefineType( "JumpTableDemo", TypeAttributes::Public );
   array<Type^>^temp0 = {int::typeid};
   MethodBuilder^ myMthdBuilder = myTypeBuilder->DefineMethod( "SwitchMe", static_cast<MethodAttributes>(MethodAttributes::Public | MethodAttributes::Static), String::typeid, temp0 );
   ILGenerator^ myIL = myMthdBuilder->GetILGenerator();
   Label defaultCase = myIL->DefineLabel();
   Label endOfMethod = myIL->DefineLabel();
   
   // We are initializing our jump table. Note that the labels
   // will be placed later using the MarkLabel method.
   array<Label>^jumpTable = gcnew array<Label>(5);
   jumpTable[ 0 ] = myIL->DefineLabel();
   jumpTable[ 1 ] = myIL->DefineLabel();
   jumpTable[ 2 ] = myIL->DefineLabel();
   jumpTable[ 3 ] = myIL->DefineLabel();
   jumpTable[ 4 ] = myIL->DefineLabel();
   
   // arg0, the number we passed, is pushed onto the stack.
   // In this case, due to the design of the code sample,
   // the value pushed onto the stack happens to match the
   // index of the label (in IL terms, the index of the offset
   // in the jump table). If this is not the case, such as
   // when switching based on non-integer values, rules for the correspondence
   // between the possible case values and each index of the offsets
   // must be established outside of the ILGenerator::Emit calls,
   // much as a compiler would.
   myIL->Emit( OpCodes::Ldarg_0 );
   myIL->Emit( OpCodes::Switch, jumpTable );
   
   // Branch on default case
   myIL->Emit( OpCodes::Br_S, defaultCase );
   
   // Case arg0 = 0
   myIL->MarkLabel( jumpTable[ 0 ] );
   myIL->Emit( OpCodes::Ldstr, "are no bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 1
   myIL->MarkLabel( jumpTable[ 1 ] );
   myIL->Emit( OpCodes::Ldstr, "is one banana" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 2
   myIL->MarkLabel( jumpTable[ 2 ] );
   myIL->Emit( OpCodes::Ldstr, "are two bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 3
   myIL->MarkLabel( jumpTable[ 3 ] );
   myIL->Emit( OpCodes::Ldstr, "are three bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Case arg0 = 4
   myIL->MarkLabel( jumpTable[ 4 ] );
   myIL->Emit( OpCodes::Ldstr, "are four bananas" );
   myIL->Emit( OpCodes::Br_S, endOfMethod );
   
   // Default case
   myIL->MarkLabel( defaultCase );
   myIL->Emit( OpCodes::Ldstr, "are many bananas" );
   myIL->MarkLabel( endOfMethod );
   myIL->Emit( OpCodes::Ret );
   return myTypeBuilder->CreateType();
}

int main()
{
   Type^ myType = BuildMyType();
   Console::Write( "Enter an integer between 0 and 5: " );
   int theValue = Convert::ToInt32( Console::ReadLine() );
   Console::WriteLine( "---" );
   Object^ myInstance = Activator::CreateInstance( myType, gcnew array<Object^>(0) );
   array<Object^>^temp1 = {theValue};
   Console::WriteLine( "Yes, there {0} today!", myType->InvokeMember( "SwitchMe", BindingFlags::InvokeMethod, nullptr, myInstance, temp1 ) );
}

using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;

class DynamicJumpTableDemo
{
   public static Type BuildMyType()
   {
    AppDomain myDomain = Thread.GetDomain();
    AssemblyName myAsmName = new AssemblyName();
    myAsmName.Name = "MyDynamicAssembly";

    AssemblyBuilder myAsmBuilder = myDomain.DefineDynamicAssembly(
                        myAsmName,
                        AssemblyBuilderAccess.Run);
    ModuleBuilder myModBuilder = myAsmBuilder.DefineDynamicModule(
                        "MyJumpTableDemo");

    TypeBuilder myTypeBuilder = myModBuilder.DefineType("JumpTableDemo",
                            TypeAttributes.Public);
    MethodBuilder myMthdBuilder = myTypeBuilder.DefineMethod("SwitchMe",
                             MethodAttributes.Public |
                             MethodAttributes.Static,
                                             typeof(string),
                                             new Type[] {typeof(int)});

    ILGenerator myIL = myMthdBuilder.GetILGenerator();

    Label defaultCase = myIL.DefineLabel();	
    Label endOfMethod = myIL.DefineLabel();	

    // We are initializing our jump table. Note that the labels
    // will be placed later using the MarkLabel method.

    Label[] jumpTable = new Label[] { myIL.DefineLabel(),
                      myIL.DefineLabel(),
                      myIL.DefineLabel(),
                      myIL.DefineLabel(),
                      myIL.DefineLabel() };

    // arg0, the number we passed, is pushed onto the stack.
    // In this case, due to the design of the code sample,
    // the value pushed onto the stack happens to match the
    // index of the label (in IL terms, the index of the offset
    // in the jump table). If this is not the case, such as
    // when switching based on non-integer values, rules for the correspondence
    // between the possible case values and each index of the offsets
    // must be established outside of the ILGenerator.Emit calls,
    // much as a compiler would.

    myIL.Emit(OpCodes.Ldarg_0);
    myIL.Emit(OpCodes.Switch, jumpTable);
    
    // Branch on default case
    myIL.Emit(OpCodes.Br_S, defaultCase);

    // Case arg0 = 0
    myIL.MarkLabel(jumpTable[0]);
    myIL.Emit(OpCodes.Ldstr, "are no bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 1
    myIL.MarkLabel(jumpTable[1]);
    myIL.Emit(OpCodes.Ldstr, "is one banana");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 2
    myIL.MarkLabel(jumpTable[2]);
    myIL.Emit(OpCodes.Ldstr, "are two bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 3
    myIL.MarkLabel(jumpTable[3]);
    myIL.Emit(OpCodes.Ldstr, "are three bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Case arg0 = 4
    myIL.MarkLabel(jumpTable[4]);
    myIL.Emit(OpCodes.Ldstr, "are four bananas");
    myIL.Emit(OpCodes.Br_S, endOfMethod);

    // Default case
    myIL.MarkLabel(defaultCase);
    myIL.Emit(OpCodes.Ldstr, "are many bananas");

    myIL.MarkLabel(endOfMethod);
    myIL.Emit(OpCodes.Ret);
    
    return myTypeBuilder.CreateType();
   }

   public static void Main()
   {
    Type myType = BuildMyType();
    
    Console.Write("Enter an integer between 0 and 5: ");
    int theValue = Convert.ToInt32(Console.ReadLine());

    Console.WriteLine("---");
    Object myInstance = Activator.CreateInstance(myType, new object[0]);	
    Console.WriteLine("Yes, there {0} today!", myType.InvokeMember("SwitchMe",
                               BindingFlags.InvokeMethod,
                               null,
                               myInstance,
                               new object[] {theValue}));
   }
}

Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit

 _

Class DynamicJumpTableDemo
   
   Public Shared Function BuildMyType() As Type

      Dim myDomain As AppDomain = Thread.GetDomain()
      Dim myAsmName As New AssemblyName()
      myAsmName.Name = "MyDynamicAssembly"
      
      Dim myAsmBuilder As AssemblyBuilder = myDomain.DefineDynamicAssembly(myAsmName, _
                            AssemblyBuilderAccess.Run)
      Dim myModBuilder As ModuleBuilder = myAsmBuilder.DefineDynamicModule("MyJumpTableDemo")
      
      Dim myTypeBuilder As TypeBuilder = myModBuilder.DefineType("JumpTableDemo", _
                                 TypeAttributes.Public)
      Dim myMthdBuilder As MethodBuilder = myTypeBuilder.DefineMethod("SwitchMe", _
                        MethodAttributes.Public Or MethodAttributes.Static, _
                        GetType(String), New Type() {GetType(Integer)})
      
      Dim myIL As ILGenerator = myMthdBuilder.GetILGenerator()
      
      Dim defaultCase As Label = myIL.DefineLabel()
      Dim endOfMethod As Label = myIL.DefineLabel()
      
      ' We are initializing our jump table. Note that the labels
      ' will be placed later using the MarkLabel method. 

      Dim jumpTable() As Label = {myIL.DefineLabel(), _
                  myIL.DefineLabel(), _
                  myIL.DefineLabel(), _
                  myIL.DefineLabel(), _
                  myIL.DefineLabel()}
      
      ' arg0, the number we passed, is pushed onto the stack.
      ' In this case, due to the design of the code sample,
      ' the value pushed onto the stack happens to match the
      ' index of the label (in IL terms, the index of the offset
      ' in the jump table). If this is not the case, such as
      ' when switching based on non-integer values, rules for the correspondence
      ' between the possible case values and each index of the offsets
      ' must be established outside of the ILGenerator.Emit calls,
      ' much as a compiler would.

      myIL.Emit(OpCodes.Ldarg_0)
      myIL.Emit(OpCodes.Switch, jumpTable)
      
      ' Branch on default case
      myIL.Emit(OpCodes.Br_S, defaultCase)
      
      ' Case arg0 = 0
      myIL.MarkLabel(jumpTable(0))
      myIL.Emit(OpCodes.Ldstr, "are no bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 1
      myIL.MarkLabel(jumpTable(1))
      myIL.Emit(OpCodes.Ldstr, "is one banana")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 2
      myIL.MarkLabel(jumpTable(2))
      myIL.Emit(OpCodes.Ldstr, "are two bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 3
      myIL.MarkLabel(jumpTable(3))
      myIL.Emit(OpCodes.Ldstr, "are three bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Case arg0 = 4
      myIL.MarkLabel(jumpTable(4))
      myIL.Emit(OpCodes.Ldstr, "are four bananas")
      myIL.Emit(OpCodes.Br_S, endOfMethod)
      
      ' Default case
      myIL.MarkLabel(defaultCase)
      myIL.Emit(OpCodes.Ldstr, "are many bananas")
      
      myIL.MarkLabel(endOfMethod)
      myIL.Emit(OpCodes.Ret)
      
      Return myTypeBuilder.CreateType()

   End Function 'BuildMyType
    
   
   Public Shared Sub Main()

      Dim myType As Type = BuildMyType()
      
      Console.Write("Enter an integer between 0 and 5: ")
      Dim theValue As Integer = Convert.ToInt32(Console.ReadLine())
      
      Console.WriteLine("---")
      Dim myInstance As [Object] = Activator.CreateInstance(myType, New Object() {})
      Console.WriteLine("Yes, there {0} today!", myType.InvokeMember("SwitchMe", _
                         BindingFlags.InvokeMethod, Nothing, _
                             myInstance, New Object() {theValue}))

   End Sub

End Class

Açıklamalar

Yönerge değerleri numaralandırmada OpCodes tanımlanır.

Etiketler kullanılarak DefineLabeloluşturulur ve akış içindeki konumları kullanılarak MarkLabeldüzeltilir. Tek baytlık yönerge kullanılırsa etiket, akış boyunca en fazla 127 baytlık bir atlamayı temsil edebilir. opcode bir dal yönergesi temsil etmelidir. Dallar göreli yönergeler olduğundan, label düzeltme işlemi sırasında dallara doğru uzaklık ile değiştirilir.