CodeDomProvider Clase

Definición

public ref class CodeDomProvider abstract : System::ComponentModel::Component

public abstract class CodeDomProvider : System.ComponentModel.Component

[System.Runtime.InteropServices.ComVisible(true)]
public abstract class CodeDomProvider : System.ComponentModel.Component

type CodeDomProvider = class
    inherit Component

[<System.Runtime.InteropServices.ComVisible(true)>]
type CodeDomProvider = class
    inherit Component

Public MustInherit Class CodeDomProvider
Inherits Component

Herencia

Object

MarshalByRefObject

Component

CodeDomProvider

Derivado

Microsoft.CSharp.CSharpCodeProvider

Microsoft.JScript.JScriptCodeProvider

Microsoft.VisualBasic.VBCodeProvider

Atributos

ComVisibleAttribute

Ejemplos

El siguiente programa de ejemplo puede generar y compilar código fuente basado en un modelo CodeDOM de un programa que imprime "Hola mundo" mediante la Console clase . Se proporciona una interfaz de usuario de Windows Forms. El usuario puede seleccionar el lenguaje de programación de destino de varias selecciones: C#, Visual Basic y JScript.

#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
#using <System.dll>
#using <Microsoft.JScript.dll>

using namespace System;
using namespace System::CodeDom;
using namespace System::CodeDom::Compiler;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::Diagnostics;
using namespace System::Drawing;
using namespace System::IO;
using namespace System::Windows::Forms;
using namespace Microsoft::CSharp;
using namespace Microsoft::VisualBasic;
using namespace Microsoft::JScript;
using namespace System::Security::Permissions;

// This example demonstrates building a Hello World program graph 
// using System.CodeDom elements. It calls code generator and
// code compiler methods to build the program using CSharp, VB, or
// JScript.  A Windows Forms interface is included. Note: Code
// must be compiled and linked with the Microsoft.JScript assembly. 
namespace CodeDOMExample
{
    [PermissionSet(SecurityAction::Demand, Name="FullTrust")]
    public ref class CodeDomExample
    {
    public:
        // Build a Hello World program graph using 
        // System::CodeDom types.
        static CodeCompileUnit^ BuildHelloWorldGraph()
        {
            // Create a new CodeCompileUnit to contain 
            // the program graph.
            CodeCompileUnit^ compileUnit = gcnew CodeCompileUnit;

            // Declare a new namespace called Samples.
            CodeNamespace^ samples = gcnew CodeNamespace( "Samples" );

            // Add the new namespace to the compile unit.
            compileUnit->Namespaces->Add( samples );

            // Add the new namespace import for the System namespace.
            samples->Imports->Add( gcnew CodeNamespaceImport( "System" ) );

            // Declare a new type called Class1.
            CodeTypeDeclaration^ class1 = gcnew CodeTypeDeclaration( "Class1" );

            // Add the new type to the namespace's type collection.
            samples->Types->Add( class1 );

            // Declare a new code entry point method.
            CodeEntryPointMethod^ start = gcnew CodeEntryPointMethod;

            // Create a type reference for the System::Console class.
            CodeTypeReferenceExpression^ csSystemConsoleType = gcnew CodeTypeReferenceExpression( "System.Console" );

            // Build a Console::WriteLine statement.
            CodeMethodInvokeExpression^ cs1 = gcnew CodeMethodInvokeExpression( csSystemConsoleType,"WriteLine", gcnew CodePrimitiveExpression("Hello World!") );

            // Add the WriteLine call to the statement collection.
            start->Statements->Add( cs1 );

            // Build another Console::WriteLine statement.
            CodeMethodInvokeExpression^ cs2 = gcnew CodeMethodInvokeExpression( csSystemConsoleType,"WriteLine", gcnew CodePrimitiveExpression( "Press the Enter key to continue." ) );

            // Add the WriteLine call to the statement collection.
            start->Statements->Add( cs2 );

            // Build a call to System::Console::ReadLine.
            CodeMethodReferenceExpression^ csReadLine = gcnew CodeMethodReferenceExpression( csSystemConsoleType, "ReadLine" );
            CodeMethodInvokeExpression^ cs3 = gcnew CodeMethodInvokeExpression( csReadLine, gcnew array<CodeExpression^>(0) );

            // Add the ReadLine statement.
            start->Statements->Add( cs3 );

            // Add the code entry point method to
            // the Members collection of the type.
            class1->Members->Add( start );
            return compileUnit;
        }

        static void GenerateCode( CodeDomProvider^ provider, CodeCompileUnit^ compileunit )
        {
            // Build the source file name with the appropriate
            // language extension.
            String^ sourceFile;
            if ( provider->FileExtension->StartsWith( "." ) )
            {
                sourceFile = String::Concat( "TestGraph", provider->FileExtension );
            }
            else
            {
                sourceFile = String::Concat( "TestGraph.", provider->FileExtension );
            }

            // Create an IndentedTextWriter, constructed with
            // a StreamWriter to the source file.
            IndentedTextWriter^ tw = gcnew IndentedTextWriter( gcnew StreamWriter( sourceFile,false ),"    " );

            // Generate source code using the code generator.
            provider->GenerateCodeFromCompileUnit( compileunit, tw, gcnew CodeGeneratorOptions );

            // Close the output file.
            tw->Close();
        }

        static CompilerResults^ CompileCode( CodeDomProvider^ provider, String^ sourceFile, String^ exeFile )
        {
            // Configure a CompilerParameters that links System.dll
            // and produces the specified executable file.
            array<String^>^referenceAssemblies = {"System.dll"};
            CompilerParameters^ cp = gcnew CompilerParameters( referenceAssemblies,exeFile,false );

            // Generate an executable rather than a DLL file.
            cp->GenerateExecutable = true;

            // Invoke compilation.
            CompilerResults^ cr = provider->CompileAssemblyFromFile( cp, sourceFile );

            // Return the results of compilation.
            return cr;
        }
    };

    public ref class CodeDomExampleForm: public System::Windows::Forms::Form
    {
    private:
        static System::Windows::Forms::Button^ run_button = gcnew System::Windows::Forms::Button;
        static System::Windows::Forms::Button^ compile_button = gcnew System::Windows::Forms::Button;
        static System::Windows::Forms::Button^ generate_button = gcnew System::Windows::Forms::Button;
        static System::Windows::Forms::TextBox^ textBox1 = gcnew System::Windows::Forms::TextBox;
        static System::Windows::Forms::ComboBox^ comboBox1 = gcnew System::Windows::Forms::ComboBox;
        static System::Windows::Forms::Label^ label1 = gcnew System::Windows::Forms::Label;
        void generate_button_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
        {
            CodeDomProvider^ provider = GetCurrentProvider();
            CodeDomExample::GenerateCode( provider, CodeDomExample::BuildHelloWorldGraph() );

            // Build the source file name with the appropriate
            // language extension.
            String^ sourceFile;
            if ( provider->FileExtension->StartsWith( "." ) )
            {
                sourceFile = String::Concat( "TestGraph", provider->FileExtension );
            }
            else
            {
                sourceFile = String::Concat( "TestGraph.", provider->FileExtension );
            }


            // Read in the generated source file and
            // display the source text.
            StreamReader^ sr = gcnew StreamReader( sourceFile );
            textBox1->Text = sr->ReadToEnd();
            sr->Close();
        }

        CodeDomProvider^ GetCurrentProvider()
        {
            CodeDomProvider^ provider;
            if ( String::Compare( dynamic_cast<String^>(this->comboBox1->SelectedItem), "CSharp" ) == 0 )
                provider = CodeDomProvider::CreateProvider("CSharp");
            else
                if ( String::Compare( dynamic_cast<String^>(this->comboBox1->SelectedItem), "Visual Basic" ) == 0 )
                    provider = CodeDomProvider::CreateProvider("VisualBasic");
                else
                    if ( String::Compare( dynamic_cast<String^>(this->comboBox1->SelectedItem), "JScript" ) == 0 )
                        provider = CodeDomProvider::CreateProvider("JScript");
                    else
                        provider = CodeDomProvider::CreateProvider("CSharp");

            return provider;
        }

        void compile_button_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
        {
            CodeDomProvider^ provider = GetCurrentProvider();

            // Build the source file name with the appropriate
            // language extension.
            String^ sourceFile = String::Concat( "TestGraph.", provider->FileExtension );

            // Compile the source file into an executable output file.
            CompilerResults^ cr = CodeDomExample::CompileCode( provider, sourceFile, "TestGraph.exe" );
            if ( cr->Errors->Count > 0 )
            {
                // Display compilation errors.
                textBox1->Text = String::Concat( "Errors encountered while building ", sourceFile, " into ", cr->PathToAssembly, ": \r\n\n" );
                System::CodeDom::Compiler::CompilerError^ ce;
                for ( int i = 0; i < cr->Errors->Count; i++ )
                {
                    ce = cr->Errors[i];
                    textBox1->AppendText( String::Concat( ce->ToString(), "\r\n" ) );

                }
                run_button->Enabled = false;
            }
            else
            {
                textBox1->Text = String::Concat( "Source ", sourceFile, " built into ", cr->PathToAssembly, " with no errors." );
                run_button->Enabled = true;
            }
        }

        void run_button_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
        {
            Process::Start( "TestGraph.exe" );
        }

    public:
        CodeDomExampleForm()
        {
            this->SuspendLayout();

            // Set properties for label1.
            this->label1->Location = System::Drawing::Point( 395, 20 );
            this->label1->Size = System::Drawing::Size( 180, 22 );
            this->label1->Text = "Select a programming language:";

            // Set properties for comboBox1.
            this->comboBox1->Location = System::Drawing::Point( 560, 16 );
            this->comboBox1->Size = System::Drawing::Size( 190, 23 );
            this->comboBox1->Name = "comboBox1";
            array<String^>^temp1 = {"CSharp","Visual Basic","JScript"};
            this->comboBox1->Items->AddRange( temp1 );
            this->comboBox1->Anchor = (System::Windows::Forms::AnchorStyles)(System::Windows::Forms::AnchorStyles::Left | System::Windows::Forms::AnchorStyles::Right | System::Windows::Forms::AnchorStyles::Top);
            this->comboBox1->SelectedIndex = 0;

            // Set properties for generate_button.
            this->generate_button->Location = System::Drawing::Point( 8, 16 );
            this->generate_button->Name = "generate_button";
            this->generate_button->Size = System::Drawing::Size( 120, 23 );
            this->generate_button->Text = "Generate Code";
            this->generate_button->Click += gcnew System::EventHandler( this, &CodeDomExampleForm::generate_button_Click );

            // Set properties for compile_button.
            this->compile_button->Location = System::Drawing::Point( 136, 16 );
            this->compile_button->Name = "compile_button";
            this->compile_button->Size = System::Drawing::Size( 120, 23 );
            this->compile_button->Text = "Compile";
            this->compile_button->Click += gcnew System::EventHandler( this, &CodeDomExampleForm::compile_button_Click );

            // Set properties for run_button.
            this->run_button->Enabled = false;
            this->run_button->Location = System::Drawing::Point( 264, 16 );
            this->run_button->Name = "run_button";
            this->run_button->Size = System::Drawing::Size( 120, 23 );
            this->run_button->Text = "Run";
            this->run_button->Click += gcnew System::EventHandler( this, &CodeDomExampleForm::run_button_Click );

            // Set properties for textBox1.
            this->textBox1->Anchor = (System::Windows::Forms::AnchorStyles)(System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Left | System::Windows::Forms::AnchorStyles::Right);
            this->textBox1->Location = System::Drawing::Point( 8, 48 );
            this->textBox1->Multiline = true;
            this->textBox1->ScrollBars = System::Windows::Forms::ScrollBars::Vertical;
            this->textBox1->Name = "textBox1";
            this->textBox1->Size = System::Drawing::Size( 744, 280 );
            this->textBox1->Text = "";

            // Set properties for the CodeDomExampleForm.
            this->AutoScaleBaseSize = System::Drawing::Size( 5, 13 );
            this->ClientSize = System::Drawing::Size( 768, 340 );
            this->MinimumSize = System::Drawing::Size( 750, 340 );
            array<System::Windows::Forms::Control^>^myControl = {this->textBox1,this->run_button,this->compile_button,this->generate_button,this->comboBox1,this->label1};
            this->Controls->AddRange( myControl );
            this->Name = "CodeDomExampleForm";
            this->Text = "CodeDom Hello World Example";
            this->ResumeLayout( false );
        }

    public:
        ~CodeDomExampleForm()
        {
        }
    };

}

[STAThread]
int main()
{
    Application::Run( gcnew CodeDOMExample::CodeDomExampleForm );
}

using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using Microsoft.CSharp;
using Microsoft.VisualBasic;
using Microsoft.JScript;

// This example demonstrates building a Hello World program graph
// using System.CodeDom elements. It calls code generator and
// code compiler methods to build the program using CSharp, VB, or
// JScript.  A Windows Forms interface is included. Note: Code
// must be compiled and linked with the Microsoft.JScript assembly.
namespace CodeDOMExample
{
    class CodeDomExample
    {
        // Build a Hello World program graph using
        // System.CodeDom types.
        public static CodeCompileUnit BuildHelloWorldGraph()
        {
            // Create a new CodeCompileUnit to contain
            // the program graph.
            CodeCompileUnit compileUnit = new CodeCompileUnit();

            // Declare a new namespace called Samples.
            CodeNamespace samples = new CodeNamespace("Samples");
            // Add the new namespace to the compile unit.
            compileUnit.Namespaces.Add(samples);

            // Add the new namespace import for the System namespace.
            samples.Imports.Add(new CodeNamespaceImport("System"));

            // Declare a new type called Class1.
            CodeTypeDeclaration class1 = new CodeTypeDeclaration("Class1");
            // Add the new type to the namespace type collection.
            samples.Types.Add(class1);

            // Declare a new code entry point method.
            CodeEntryPointMethod start = new CodeEntryPointMethod();

            // Create a type reference for the System.Console class.
            CodeTypeReferenceExpression csSystemConsoleType = new CodeTypeReferenceExpression("System.Console");

            // Build a Console.WriteLine statement.
            CodeMethodInvokeExpression cs1 = new CodeMethodInvokeExpression(
                csSystemConsoleType, "WriteLine",
                new CodePrimitiveExpression("Hello World!"));

            // Add the WriteLine call to the statement collection.
            start.Statements.Add(cs1);

            // Build another Console.WriteLine statement.
            CodeMethodInvokeExpression cs2 = new CodeMethodInvokeExpression(
                csSystemConsoleType, "WriteLine",
                new CodePrimitiveExpression("Press the Enter key to continue."));

            // Add the WriteLine call to the statement collection.
            start.Statements.Add(cs2);

            // Build a call to System.Console.ReadLine.
            CodeMethodInvokeExpression csReadLine = new CodeMethodInvokeExpression(
                csSystemConsoleType, "ReadLine");

            // Add the ReadLine statement.
            start.Statements.Add(csReadLine);

            // Add the code entry point method to
            // the Members collection of the type.
            class1.Members.Add(start);

            return compileUnit;
        }

        public static void GenerateCode(CodeDomProvider provider,
            CodeCompileUnit compileunit)
        {
            // Build the source file name with the appropriate
            // language extension.
            String sourceFile;
            if (provider.FileExtension[0] == '.')
            {
                sourceFile = "TestGraph" + provider.FileExtension;
            }
            else
            {
                sourceFile = "TestGraph." + provider.FileExtension;
            }

            // Create an IndentedTextWriter, constructed with
            // a StreamWriter to the source file.
            IndentedTextWriter tw = new IndentedTextWriter(new StreamWriter(sourceFile, false), "    ");
            // Generate source code using the code generator.
            provider.GenerateCodeFromCompileUnit(compileunit, tw, new CodeGeneratorOptions());
            // Close the output file.
            tw.Close();
        }

        public static CompilerResults CompileCode(CodeDomProvider provider,
                                                  String sourceFile,
                                                  String exeFile)
        {
            // Configure a CompilerParameters that links System.dll
            // and produces the specified executable file.
            String[] referenceAssemblies = { "System.dll" };
            CompilerParameters cp = new CompilerParameters(referenceAssemblies,
                                                           exeFile, false);
            // Generate an executable rather than a DLL file.
            cp.GenerateExecutable = true;

            // Invoke compilation.
            CompilerResults cr = provider.CompileAssemblyFromFile(cp, sourceFile);
            // Return the results of compilation.
            return cr;
        }
    }

    public class CodeDomExampleForm : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Button run_button = new System.Windows.Forms.Button();
        private System.Windows.Forms.Button compile_button = new System.Windows.Forms.Button();
        private System.Windows.Forms.Button generate_button = new System.Windows.Forms.Button();
        private System.Windows.Forms.TextBox textBox1 = new System.Windows.Forms.TextBox();
        private System.Windows.Forms.ComboBox comboBox1 = new System.Windows.Forms.ComboBox();
        private System.Windows.Forms.Label label1 = new System.Windows.Forms.Label();

        private void generate_button_Click(object sender, System.EventArgs e)
        {
            CodeDomProvider provider = GetCurrentProvider();
            CodeDomExample.GenerateCode(provider, CodeDomExample.BuildHelloWorldGraph());

            // Build the source file name with the appropriate
            // language extension.
            String sourceFile;
            if (provider.FileExtension[0] == '.')
            {
                sourceFile = "TestGraph" + provider.FileExtension;
            }
            else
            {
                sourceFile = "TestGraph." + provider.FileExtension;
            }

            // Read in the generated source file and
            // display the source text.
            StreamReader sr = new StreamReader(sourceFile);
            textBox1.Text = sr.ReadToEnd();
            sr.Close();
        }

        private void compile_button_Click(object sender, System.EventArgs e)
        {
            CodeDomProvider provider = GetCurrentProvider();

            // Build the source file name with the appropriate
            // language extension.
            String sourceFile;
            if (provider.FileExtension[0] == '.')
            {
                sourceFile = "TestGraph" + provider.FileExtension;
            }
            else
            {
                sourceFile = "TestGraph." + provider.FileExtension;
            }

            // Compile the source file into an executable output file.
            CompilerResults cr = CodeDomExample.CompileCode(provider,
                                                            sourceFile,
                                                            "TestGraph.exe");

            if (cr.Errors.Count > 0)
            {
                // Display compilation errors.
                textBox1.Text = "Errors encountered while building " +
                                sourceFile + " into " + cr.PathToAssembly + ": \r\n\n";
                foreach (CompilerError ce in cr.Errors)
                    textBox1.AppendText(ce.ToString() + "\r\n");
                run_button.Enabled = false;
            }
            else
            {
                textBox1.Text = "Source " + sourceFile + " built into " +
                                cr.PathToAssembly + " with no errors.";
                run_button.Enabled = true;
            }
        }

        private void run_button_Click(object sender,
            System.EventArgs e)
        {
            Process.Start("TestGraph.exe");
        }

        private CodeDomProvider GetCurrentProvider()
        {
            CodeDomProvider provider;
            switch ((string)this.comboBox1.SelectedItem)
            {
                case "CSharp":
                    provider = CodeDomProvider.CreateProvider("CSharp");
                    break;
                case "Visual Basic":
                    provider = CodeDomProvider.CreateProvider("VisualBasic");
                    break;
                case "JScript":
                    provider = CodeDomProvider.CreateProvider("JScript");
                    break;
                default:
                    provider = CodeDomProvider.CreateProvider("CSharp");
                    break;
            }
            return provider;
        }

        public CodeDomExampleForm()
        {
            this.SuspendLayout();
            // Set properties for label1
            this.label1.Location = new System.Drawing.Point(395, 20);
            this.label1.Size = new Size(180, 22);
            this.label1.Text = "Select a programming language:";
            // Set properties for comboBox1
            this.comboBox1.Location = new System.Drawing.Point(560, 16);
            this.comboBox1.Size = new Size(190, 23);
            this.comboBox1.Name = "comboBox1";
            this.comboBox1.Items.AddRange(new string[] { "CSharp", "Visual Basic", "JScript" });
            this.comboBox1.Anchor = System.Windows.Forms.AnchorStyles.Left
                                    | System.Windows.Forms.AnchorStyles.Right
                                    | System.Windows.Forms.AnchorStyles.Top;
            this.comboBox1.SelectedIndex = 0;
            // Set properties for generate_button.
            this.generate_button.Location = new System.Drawing.Point(8, 16);
            this.generate_button.Name = "generate_button";
            this.generate_button.Size = new System.Drawing.Size(120, 23);
            this.generate_button.Text = "Generate Code";
            this.generate_button.Click += new System.EventHandler(this.generate_button_Click);
            // Set properties for compile_button.
            this.compile_button.Location = new System.Drawing.Point(136, 16);
            this.compile_button.Name = "compile_button";
            this.compile_button.Size = new System.Drawing.Size(120, 23);
            this.compile_button.Text = "Compile";
            this.compile_button.Click += new System.EventHandler(this.compile_button_Click);
            // Set properties for run_button.
            this.run_button.Enabled = false;
            this.run_button.Location = new System.Drawing.Point(264, 16);
            this.run_button.Name = "run_button";
            this.run_button.Size = new System.Drawing.Size(120, 23);
            this.run_button.Text = "Run";
            this.run_button.Click += new System.EventHandler(this.run_button_Click);
            // Set properties for textBox1.
            this.textBox1.Anchor = (System.Windows.Forms.AnchorStyles.Top
                                     | System.Windows.Forms.AnchorStyles.Bottom
                                     | System.Windows.Forms.AnchorStyles.Left
                                     | System.Windows.Forms.AnchorStyles.Right);
            this.textBox1.Location = new System.Drawing.Point(8, 48);
            this.textBox1.Multiline = true;
            this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(744, 280);
            this.textBox1.Text = "";
            // Set properties for the CodeDomExampleForm.
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(768, 340);
            this.MinimumSize = new System.Drawing.Size(750, 340);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {this.textBox1,
                this.run_button, this.compile_button, this.generate_button,
                this.comboBox1, this.label1 });
            this.Name = "CodeDomExampleForm";
            this.Text = "CodeDom Hello World Example";
            this.ResumeLayout(false);
        }

        protected override void Dispose(bool disposing)
        {
            base.Dispose(disposing);
        }

        [STAThread]
        static void Main()
        {
            Application.Run(new CodeDomExampleForm());
        }
    }
}

Imports System.CodeDom
Imports System.CodeDom.Compiler
Imports System.Collections
Imports System.ComponentModel
Imports System.Diagnostics
Imports System.Drawing
Imports System.IO
Imports System.Windows.Forms
Imports Microsoft.CSharp
Imports Microsoft.JScript

' This example demonstrates building a Hello World program graph 
' using System.CodeDom elements. It calls code generator and
' code compiler methods to build the program using CSharp, VB, or
' JScript.  A Windows Forms interface is included. Note: Code
' must be compiled and linked with the Microsoft.JScript assembly. 
Namespace CodeDOMExample

    Class CodeDomExample
        ' Build a Hello World program graph using 
        ' System.CodeDom types.
        Public Shared Function BuildHelloWorldGraph() As CodeCompileUnit

            ' Create a new CodeCompileUnit to contain 
            ' the program graph.
            Dim compileUnit As New CodeCompileUnit()

            ' Declare a new namespace called Samples.
            Dim samples As New CodeNamespace("Samples")

            ' Add the new namespace to the compile unit.
            compileUnit.Namespaces.Add(samples)

            ' Add the new namespace import for the System namespace.
            samples.Imports.Add(New CodeNamespaceImport("System"))

            ' Declare a new type called Class1.
            Dim class1 As New CodeTypeDeclaration("Class1")

            ' Add the new type to the namespace type collection.
            samples.Types.Add(class1)

            ' Declare a new code entry point method.
            Dim start As New CodeEntryPointMethod()

            ' Create a type reference for the System.Console class.
            Dim csSystemConsoleType As New CodeTypeReferenceExpression( _
                "System.Console")

            ' Build a Console.WriteLine statement.
            Dim cs1 As New CodeMethodInvokeExpression( _
                csSystemConsoleType, "WriteLine", _
                New CodePrimitiveExpression("Hello World!"))

            ' Add the WriteLine call to the statement collection.
            start.Statements.Add(cs1)

            ' Build another Console.WriteLine statement.
            Dim cs2 As New CodeMethodInvokeExpression( _
                csSystemConsoleType, "WriteLine", _
                New CodePrimitiveExpression("Press the Enter key to continue."))

            ' Add the WriteLine call to the statement collection.
            start.Statements.Add(cs2)

            ' Build a call to System.Console.ReadLine.
            Dim csReadLine As New CodeMethodInvokeExpression( _
                csSystemConsoleType, "ReadLine")

            ' Add the ReadLine statement.
            start.Statements.Add(csReadLine)

            ' Add the code entry point method to
            ' the Members collection of the type.
            class1.Members.Add(start)

            Return compileUnit
        End Function

        Public Shared Sub GenerateCode(ByVal provider As CodeDomProvider, ByVal compileunit As CodeCompileUnit)

            ' Build the source file name with the appropriate
            ' language extension.
            Dim sourceFile As String
            If provider.FileExtension.StartsWith(".") Then
                sourceFile = "TestGraph" + provider.FileExtension
            Else
                sourceFile = "TestGraph." + provider.FileExtension
            End If

            ' Create an IndentedTextWriter, constructed with
            ' a StreamWriter to the source file.
            Dim tw As New IndentedTextWriter(New StreamWriter(sourceFile, False), "    ")
            ' Generate source code using the code generator.
            provider.GenerateCodeFromCompileUnit(compileunit, tw, New CodeGeneratorOptions())
            ' Close the output file.
            tw.Close()
        End Sub

        Public Shared Function CompileCode(ByVal provider As CodeDomProvider, _
                                           ByVal sourceFile As String, _
                                           ByVal exeFile As String) As CompilerResults

            ' Configure a CompilerParameters that links System.dll
            ' and produces the specified executable file.
            Dim referenceAssemblies As String() = {"System.dll"}
            Dim cp As New CompilerParameters(referenceAssemblies, exeFile, False)

            ' Generate an executable rather than a DLL file.
            cp.GenerateExecutable = True

            ' Invoke compilation.
            Dim cr As CompilerResults = provider.CompileAssemblyFromFile(cp, _
                sourceFile)
            ' Return the results of compilation.
            Return cr
        End Function
    End Class

    Public Class CodeDomExampleForm
        Inherits System.Windows.Forms.Form
        Private run_button As New System.Windows.Forms.Button()
        Private compile_button As New System.Windows.Forms.Button()
        Private generate_button As New System.Windows.Forms.Button()
        Private textBox1 As New System.Windows.Forms.TextBox()
        Private comboBox1 As New System.Windows.Forms.ComboBox()
        Private label1 As New System.Windows.Forms.Label()

        Private Sub generate_button_Click(ByVal sender As Object, ByVal e As System.EventArgs)
            Dim provider As CodeDomProvider = GetCurrentProvider()
            CodeDomExample.GenerateCode(provider, CodeDomExample.BuildHelloWorldGraph())

            ' Build the source file name with the appropriate
            ' language extension.
            Dim sourceFile As String
            If provider.FileExtension.StartsWith(".") Then
                sourceFile = "TestGraph" + provider.FileExtension
            Else
                sourceFile = "TestGraph." + provider.FileExtension
            End If

            ' Read in the generated source file and
            ' display the source text.
            Dim sr As New StreamReader(sourceFile)
            textBox1.Text = sr.ReadToEnd()
            sr.Close()
        End Sub

        Private Sub compile_button_Click(ByVal sender As Object, ByVal e As System.EventArgs)
            Dim provider As CodeDomProvider = GetCurrentProvider()

            ' Build the source file name with the appropriate
            ' language extension.
            Dim sourceFile As String
            If provider.FileExtension.StartsWith(".") Then
                sourceFile = "TestGraph" + provider.FileExtension
            Else
                sourceFile = "TestGraph." + provider.FileExtension
            End If

            Dim cr As CompilerResults = CodeDomExample.CompileCode(provider, _
                                                                   sourceFile, _
                                                                   "TestGraph.EXE")

            If cr.Errors.Count > 0 Then
                ' Display compilation errors.
                textBox1.Text = "Errors encountered while building " + _
                                sourceFile + " into " + _
                                cr.PathToAssembly + ": " + ControlChars.CrLf

                Dim ce As System.CodeDom.Compiler.CompilerError
                For Each ce In cr.Errors
                    textBox1.AppendText(ce.ToString() + ControlChars.CrLf)
                Next ce
                run_button.Enabled = False
            Else
                textBox1.Text = "Source " + sourceFile + " built into " + _
                                cr.PathToAssembly + " with no errors."
                run_button.Enabled = True
            End If
        End Sub

        Private Sub run_button_Click(ByVal sender As Object, _
            ByVal e As System.EventArgs)

            Process.Start("TestGraph.EXE")
        End Sub

        Private Function GetCurrentProvider() As CodeDomProvider

            Dim provider As CodeDomProvider
            Select Case CStr(Me.comboBox1.SelectedItem)
                Case "CSharp"
                    provider = CodeDomProvider.CreateProvider("CSharp")
                Case "Visual Basic"
                    provider = CodeDomProvider.CreateProvider("VisualBasic")
                Case "JScript"
                    provider = CodeDomProvider.CreateProvider("JScript")
                Case Else
                    provider = CodeDomProvider.CreateProvider("CSharp")
            End Select
            Return provider
        End Function

        Public Sub New()
            Me.SuspendLayout()
            ' Set properties for label1.
            Me.label1.Location = New System.Drawing.Point(395, 20)
            Me.label1.Size = New Size(180, 22)
            Me.label1.Text = "Select a programming language:"
            ' Set properties for comboBox1.
            Me.comboBox1.Location = New System.Drawing.Point(560, 16)
            Me.comboBox1.Size = New Size(190, 23)
            Me.comboBox1.Name = "comboBox1"
            Me.comboBox1.Items.AddRange(New String() {"CSharp", "Visual Basic", "JScript"})
            Me.comboBox1.Anchor = System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right Or System.Windows.Forms.AnchorStyles.Top
            Me.comboBox1.SelectedIndex = 0
            ' Set properties for generate_button.
            Me.generate_button.Location = New System.Drawing.Point(8, 16)
            Me.generate_button.Name = "generate_button"
            Me.generate_button.Size = New System.Drawing.Size(120, 23)
            Me.generate_button.Text = "Generate Code"
            AddHandler generate_button.Click, AddressOf Me.generate_button_Click
            ' Set properties for compile_button.
            Me.compile_button.Location = New System.Drawing.Point(136, 16)
            Me.compile_button.Name = "compile_button"
            Me.compile_button.Size = New System.Drawing.Size(120, 23)
            Me.compile_button.Text = "Compile"
            AddHandler compile_button.Click, AddressOf Me.compile_button_Click
            ' Set properties for run_button.
            Me.run_button.Enabled = False
            Me.run_button.Location = New System.Drawing.Point(264, 16)
            Me.run_button.Name = "run_button"
            Me.run_button.Size = New System.Drawing.Size(120, 23)
            Me.run_button.Text = "Run"
            AddHandler run_button.Click, AddressOf Me.run_button_Click
            ' Set properties for textBox1.
            Me.textBox1.Anchor = System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right
            Me.textBox1.Location = New System.Drawing.Point(8, 48)
            Me.textBox1.Multiline = True
            Me.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
            Me.textBox1.Name = "textBox1"
            Me.textBox1.Size = New System.Drawing.Size(744, 280)
            Me.textBox1.Text = ""
            ' Set properties for the CodeDomExampleForm.
            Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
            Me.ClientSize = New System.Drawing.Size(768, 340)
            Me.MinimumSize = New System.Drawing.Size(750, 340)
            Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.textBox1, _
                Me.run_button, Me.compile_button, Me.generate_button, _
                Me.comboBox1, Me.label1})
            Me.Name = "CodeDomExampleForm"
            Me.Text = "CodeDom Hello World Example"
            Me.ResumeLayout(False)
        End Sub

        Protected Overloads Sub Dispose(ByVal disposing As Boolean)
            MyBase.Dispose(disposing)
        End Sub

        <STAThread()> _
        Shared Sub Main()
            Application.Run(New CodeDomExampleForm())
        End Sub
    End Class
End Namespace

Comentarios

Se CodeDomProvider puede usar para crear y recuperar instancias de generadores de código y compiladores de código. Los generadores de código pueden utilizarse para generar código en un determinado lenguaje y los compiladores de código para compilar código y generar ensamblados.

Normalmente, una CodeDomProvider implementación proporciona interfaces de generación de código o compilación de código para generar código y administrar la compilación para un único lenguaje de programación. Varios lenguajes son compatibles con CodeDomProvider implementaciones que se incluyen con Windows SDK. Estos lenguajes incluyen C#, Visual Basic, C++y JScript. Los desarrolladores o proveedores de compiladores pueden implementar las ICodeGenerator interfaces y ICodeCompiler y proporcionar un CodeDomProvider que extienda la compatibilidad con CodeDOM a otros lenguajes de programación.

El <elemento system.codedom> del archivo de configuración de la máquina (Machine.config) proporciona un mecanismo para que los desarrolladores y los proveedores del compilador agreguen opciones de configuración para implementaciones adicionalesCodeDomProvider.

La CodeDomProvider clase proporciona métodos estáticos para detectar y enumerar las CodeDomProvider implementaciones en un equipo. El GetAllCompilerInfo método devuelve la configuración de todas las CodeDomProvider implementaciones de un equipo. El GetCompilerInfo método devuelve la configuración de una implementación específica CodeDomProvider , según el nombre del lenguaje de programación. El CreateProvider método devuelve una instancia de una CodeDomProvider implementación para un lenguaje específico.

Para obtener más información sobre la configuración del proveedor de idioma en el archivo de configuración, vea Esquema de configuración del compilador y del proveedor de lenguaje.

Notas a los implementadores

En las versiones 1.0 y 1.1 de .NET Framework, los proveedores de código constan de implementaciones de CodeDomProvider, ICodeGenerator, ICodeParsery ICodeCompiler. En .NET Framework 2.0, los CreateGenerator()métodos , CreateParser()y CreateCompiler() están obsoletos, y los métodos de ICodeGenerator y ICodeCompiler están disponibles directamente en la CodeDomProvider clase . Debe invalidar esos métodos en la implementación del proveedor de código y no llamar a los métodos base.

Constructores

Propiedades

Métodos

Eventos

Se aplica a

Consulte también

• CompilerInfo
• CSharpCodeProvider
• VBCodeProvider
• JScriptCodeProvider
• Esquema de configuración de compilador y proveedor de lenguaje