CompilerInfo.IsCodeDomProviderTypeValid Properti

Definisi

Ruang nama:

System.CodeDom.Compiler

Rakitan:

System.CodeDom.dll

Paket:

System.CodeDom v8.0.0

Sumber:

CompilerInfo.cs

Mengembalikan nilai yang menunjukkan apakah implementasi penyedia bahasa dikonfigurasi di komputer.

public:
 property bool IsCodeDomProviderTypeValid { bool get(); };

public bool IsCodeDomProviderTypeValid { get; }

member this.IsCodeDomProviderTypeValid : bool

Public ReadOnly Property IsCodeDomProviderTypeValid As Boolean

Nilai Properti

Boolean

true jika jenis implementasi penyedia bahasa dikonfigurasi pada komputer; jika tidak, false.

Contoh

Contoh kode berikut menentukan apakah bahasa input memiliki implementasi yang dikonfigurasi CodeDomProvider di komputer. Jika ada penyedia yang dikonfigurasi untuk bahasa yang ditentukan, contohnya menampilkan pengaturan konfigurasi penyedia bahasa. Contoh kode ini adalah bagian dari contoh yang lebih besar yang disediakan untuk CompilerInfo kelas .

CodeDomProvider^ provider = nullptr;
CompilerInfo^ info = CodeDomProvider::GetCompilerInfo( configLanguage );

// Check whether there is a provider configured for this language.
if ( info->IsCodeDomProviderTypeValid )
{
   // Get a provider instance using the configured type information.
   provider = dynamic_cast<CodeDomProvider^>(Activator::CreateInstance( info->CodeDomProviderType ));
   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.
      CompilerParameters^ langCompilerConfig = info->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}\".", configLanguage );

CompilerInfo info = CodeDomProvider.GetCompilerInfo(configLanguage);

// Check whether there is a provider configured for this language.
if (info.IsCodeDomProviderTypeValid)
{
    // Get a provider instance using the configured type information.
    CodeDomProvider provider;
    provider = (CodeDomProvider)Activator.CreateInstance(info.CodeDomProviderType);

    // 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.

    CompilerParameters langCompilerConfig = info.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}\".",
        configLanguage);
}

Dim info As CompilerInfo = CodeDomProvider.GetCompilerInfo(configLanguage)

' Check whether there is a provider configured for this language.
If info.IsCodeDomProviderTypeValid Then
   ' Get a provider instance using the configured type information.
   Dim provider As CodeDomProvider
   provider = CType(Activator.CreateInstance(info.CodeDomProviderType), CodeDomProvider)
   
   ' 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 langCompilerConfig As CompilerParameters = info.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}"".", configLanguage)
End If

Keterangan

IsCodeDomProviderTypeValid Gunakan properti untuk memeriksa CodeDomProvider implementasi sebelum mengakses properti atau metode penyedia. Misalnya, setelah Anda mendapatkan pengaturan penyedia bahasa dari GetCompilerInfo metode , gunakan IsCodeDomProviderTypeValid properti untuk memverifikasi implementasi jenis penyedia sebelum memanggil CreateProvider metode atau menggunakan CodeDomProviderType properti .

Lihat juga

• CodeDomProviderType
• CodeDomProvider