CodeDomProvider.IsDefinedLanguage(String) Method

public:
 static bool IsDefinedLanguage(System::String ^ language);

public static bool IsDefinedLanguage (string language);

[System.Runtime.InteropServices.ComVisible(false)]
public static bool IsDefinedLanguage (string language);

static member IsDefinedLanguage : string -> bool

[<System.Runtime.InteropServices.ComVisible(false)>]
static member IsDefinedLanguage : string -> bool

Public Shared Function IsDefinedLanguage (language As String) As Boolean

Parameters

Returns

true if a CodeDomProvider implementation is configured for the specified language; otherwise, false.

Attributes

ComVisibleAttribute

Exceptions

Examples

The following code example determines the CodeDomProvider implementation for an input language and displays the configured settings for the language provider. This code example is part of a larger example provided for the CompilerInfo class.

CodeDomProvider^ provider = nullptr;

// Check for a provider corresponding to the input language.  
if ( CodeDomProvider::IsDefinedLanguage( language ) )
{
   provider = CodeDomProvider::CreateProvider( language );
   if ( provider )
   {
      // Display information about this language provider.
      Console::WriteLine( "Language provider:  {0}", provider->ToString() );
      Console::WriteLine();
      Console::WriteLine( "  Default file extension:  {0}", provider->FileExtension );
      Console::WriteLine();
      
      // Get the compiler settings for this language.
      CompilerInfo^ langCompilerInfo = CodeDomProvider::GetCompilerInfo( language );
      if ( langCompilerInfo )
      {
         CompilerParameters^ langCompilerConfig = langCompilerInfo->CreateDefaultCompilerParameters();
         if ( langCompilerConfig )
         {
            Console::WriteLine( "  Compiler options:        {0}", langCompilerConfig->CompilerOptions );
            Console::WriteLine( "  Compiler warning level:  {0}", langCompilerConfig->WarningLevel.ToString() );
         }
      }
   }
}

if ( provider == nullptr )  // Tell the user that the language provider was not found.
   Console::WriteLine(  "There is no provider configured for input language \"{0}\".", language );

CodeDomProvider provider;

// Check for a provider corresponding to the input language.
if (CodeDomProvider.IsDefinedLanguage(language))
{
    provider = CodeDomProvider.CreateProvider(language);

    // Display information about this language provider.

    Console.WriteLine("Language provider:  {0}",
        provider.ToString());
    Console.WriteLine();
    Console.WriteLine("  Default file extension:  {0}",
        provider.FileExtension);
    Console.WriteLine();

    // Get the compiler settings for this language.

    CompilerInfo langCompilerInfo = CodeDomProvider.GetCompilerInfo(language);
    CompilerParameters langCompilerConfig = langCompilerInfo.CreateDefaultCompilerParameters();

    Console.WriteLine("  Compiler options:        {0}",
        langCompilerConfig.CompilerOptions);
    Console.WriteLine("  Compiler warning level:  {0}",
        langCompilerConfig.WarningLevel);
}
else
{
    // Tell the user that the language provider was not found.
    Console.WriteLine("There is no provider configured for input language \"{0}\".",
        language);
}

Dim provider As CodeDomProvider

' Check for a provider corresponding to the input language.  
If CodeDomProvider.IsDefinedLanguage(language) Then
   provider = CodeDomProvider.CreateProvider(language)
   
   ' Display information about this language provider.
   Console.WriteLine("Language provider:  {0}", _
       provider.ToString())
   Console.WriteLine()
   Console.WriteLine("  Default file extension:  {0}", _
       provider.FileExtension)
   Console.WriteLine()
   
   ' Get the compiler settings for this language.
   Dim langCompilerInfo As CompilerInfo = CodeDomProvider.GetCompilerInfo(language)
   Dim langCompilerConfig As CompilerParameters = langCompilerInfo.CreateDefaultCompilerParameters()
   
   Console.WriteLine("  Compiler options:        {0}", _
       langCompilerConfig.CompilerOptions)
   Console.WriteLine("  Compiler warning level:  {0}", _
       langCompilerConfig.WarningLevel)
Else
   ' Tell the user that the language provider was not found.
   Console.WriteLine("There is no provider configured for input language ""{0}"".", _
       language)
End If

Remarks

The <system.codedom> Element in the machine configuration file (Machine.config) contains the language provider and compiler configuration settings for each CodeDomProvider implementation on the computer. The IsDefinedLanguage method searches the provider configuration elements for the specified language name.

Language names are case-insensitive.

Applies to

See also

• CreateProvider(String)
• Compiler and Language Provider Settings Schema