MethodBuilder.DefineGenericParameters(String[]) Yöntem

Başvuru

Tanım

Ad Alanı:: System.Reflection.Emit

Bütünleştirilmiş Kod:: System.Reflection.Emit.dll

Bütünleştirilmiş Kod:: netstandard.dll

Bütünleştirilmiş Kod:: mscorlib.dll

Önemli

Bazı bilgiler ürünün ön sürümüyle ilgilidir ve sürüm öncesinde önemli değişiklikler yapılmış olabilir. Burada verilen bilgilerle ilgili olarak Microsoft açık veya zımni hiçbir garanti vermez.

Geçerli yöntem için genel tür parametrelerinin sayısını ayarlar, adlarını belirtir ve kısıtlamalarını tanımlamak için kullanılan GenericTypeParameterBuilder bir nesne dizisi döndürür.

public:
 cli::array <System::Reflection::Emit::GenericTypeParameterBuilder ^> ^ DefineGenericParameters(... cli::array <System::String ^> ^ names);

public:
 cli::array <System::Reflection::Emit::GenericTypeParameterBuilder ^> ^ DefineGenericParameters(cli::array <System::String ^> ^ names);

public System.Reflection.Emit.GenericTypeParameterBuilder[] DefineGenericParameters (params string[] names);

public System.Reflection.Emit.GenericTypeParameterBuilder[] DefineGenericParameters (string[] names);

member this.DefineGenericParameters : string[] -> System.Reflection.Emit.GenericTypeParameterBuilder[]

Public Function DefineGenericParameters (ParamArray names As String()) As GenericTypeParameterBuilder()

Public Function DefineGenericParameters (names As String()) As GenericTypeParameterBuilder()

Parametreler

names: String[]

Genel tür parametrelerinin adlarını temsil eden dize dizisi.

Döndürülenler

GenericTypeParameterBuilder[]

Genel GenericTypeParameterBuilder yöntemin tür parametrelerini temsil eden nesneler dizisi.

Özel durumlar

InvalidOperationException

Bu yöntem için genel tür parametreleri zaten tanımlanmıştır.

-veya- yöntemi zaten tamamlandı.

-veya- SetImplementationFlags(MethodImplAttributes)Yöntemi geçerli yöntem için çağrıldı.

ArgumentNullException

names, null değeridir.

-veya- Öğesi names null .

ArgumentException

names boş bir dizidir.

Örnekler

Aşağıdaki kod örneği, dinamik genel yöntemini DemoType içeren dinamik bir türü DemoMethod oluşturur. Bu yöntemin biri parametre, diğeri de dönüş türü olarak kullanılan iki genel tür parametresi vardır.

Kod yürütülürken, dinamik derleme DemoGenericMethod1.dll olarak kaydedilir veIldasm.exe (IL Disassembler) kullanılarak inceilebilir.

Not

Bu kod örneği yalnızca null başvuru döndüren basit bir yöntem gövdesi üretir. Genel türleri oluşturan ve kullanan daha tam olarak geliştirilmiş bir yöntem gövdesine sahip bir kod örneği için bkz. Nasıl:Yansıma Yayma ile Genel Bir Yöntem Tanımlama.

using namespace System;
using namespace System::Reflection;
using namespace System::Reflection::Emit;

public ref class GenericReflectionSample
{
};

int main()
{
    // Creating a dynamic assembly requires an AssemblyName
    // object, and the current application domain.
    //
    AssemblyName^ asmName =
        gcnew AssemblyName("EmittedAssembly");
    AppDomain^ domain = AppDomain::CurrentDomain;
    AssemblyBuilder^ sampleAssemblyBuilder =
        domain->DefineDynamicAssembly(asmName,
        AssemblyBuilderAccess::RunAndSave);

    // Define the module that contains the code. For an
    // assembly with one module, the module name is the
    // assembly name plus a file extension.
    ModuleBuilder^ sampleModuleBuilder =
        sampleAssemblyBuilder->DefineDynamicModule(asmName->Name,
        asmName->Name + ".dll");

    TypeBuilder^ sampleTypeBuilder =
        sampleModuleBuilder->DefineType("SampleType",
        TypeAttributes::Public | TypeAttributes::Abstract);

    // Define a Shared, Public method with standard calling
    // conventions. Do not specify the parameter types or the
    // return type, because type parameters will be used for
    // those types, and the type parameters have not been
    // defined yet.
    MethodBuilder^ sampleMethodBuilder =
        sampleTypeBuilder->DefineMethod("SampleMethod",
        MethodAttributes::Public | MethodAttributes::Static);

    // Defining generic parameters for the method makes it a
    // generic method. By convention, type parameters are
    // single alphabetic characters. T and U are used here.
    //
    array<String^>^ genericTypeNames = {"T", "U"};
    array<GenericTypeParameterBuilder^>^ genericTypes =
        sampleMethodBuilder->DefineGenericParameters(
        genericTypeNames);

    // Use the IsGenericMethod property to find out if a
    // dynamic method is generic, and IsGenericMethodDefinition
    // to find out if it defines a generic method.
    Console::WriteLine("Is SampleMethod generic? {0}",
        sampleMethodBuilder->IsGenericMethod);
    Console::WriteLine(
        "Is SampleMethod a generic method definition? {0}",
        sampleMethodBuilder->IsGenericMethodDefinition);

    // Set parameter types for the method. The method takes
    // one parameter, and its type is specified by the first
    // type parameter, T.
    array<Type^>^ parameterTypes = {genericTypes[0]};
    sampleMethodBuilder->SetParameters(parameterTypes);

    // Set the return type for the method. The return type is
    // specified by the second type parameter, U.
    sampleMethodBuilder->SetReturnType(genericTypes[1]);

    // Generate a code body for the method. The method doesn't
    // do anything except return null.
    //
    ILGenerator^ ilgen = sampleMethodBuilder->GetILGenerator();
    ilgen->Emit(OpCodes::Ldnull);
    ilgen->Emit(OpCodes::Ret);

    // Complete the type.
    Type^ sampleType = sampleTypeBuilder->CreateType();

    // To bind types to a dynamic generic method, you must
    // first call the GetMethod method on the completed type.
    // You can then define an array of types, and bind them
    // to the method.
    MethodInfo^ sampleMethodInfo = sampleType->GetMethod("SampleMethod");
    array<Type^>^ boundParameters =
        {String::typeid, GenericReflectionSample::typeid};
    MethodInfo^ boundMethodInfo =
        sampleMethodInfo->MakeGenericMethod(boundParameters);
    // Display a string representing the bound method.
    Console::WriteLine(boundMethodInfo);

    // Save the assembly, so it can be examined with Ildasm.exe.
    sampleAssemblyBuilder->Save(asmName->Name + ".dll");
}

/* This code example produces the following output:
Is SampleMethod generic? True
Is SampleMethod a generic method definition? True
GenericReflectionSample SampleMethod[String,GenericReflectionSample](System.String)
*/

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

class DemoMethodBuilder
{

    public static void Main()
    {
        // Creating a dynamic assembly requires an AssemblyName
        // object, and the current application domain.
        //
        AssemblyName asmName =
            new AssemblyName("DemoMethodBuilder1");
        AppDomain domain = AppDomain.CurrentDomain;
        AssemblyBuilder demoAssembly =
            domain.DefineDynamicAssembly(
                asmName,
                AssemblyBuilderAccess.RunAndSave
            );

        // Define the module that contains the code. For an
        // assembly with one module, the module name is the
        // assembly name plus a file extension.
        ModuleBuilder demoModule =
            demoAssembly.DefineDynamicModule(
                asmName.Name,
                asmName.Name + ".dll"
            );

        TypeBuilder demoType = demoModule.DefineType(
            "DemoType",
            TypeAttributes.Public | TypeAttributes.Abstract
        );

        // Define a Shared, Public method with standard calling
        // conventions. Do not specify the parameter types or the
        // return type, because type parameters will be used for
        // those types, and the type parameters have not been
        // defined yet.
        MethodBuilder demoMethod = demoType.DefineMethod(
            "DemoMethod",
            MethodAttributes.Public | MethodAttributes.Static
        );

        // Defining generic parameters for the method makes it a
        // generic method. By convention, type parameters are
        // single alphabetic characters. T and U are used here.
        //
        string[] typeParamNames = {"T", "U"};
        GenericTypeParameterBuilder[] typeParameters =
            demoMethod.DefineGenericParameters(typeParamNames);

        // The second type parameter is constrained to be a
        // reference type.
        typeParameters[1].SetGenericParameterAttributes(
            GenericParameterAttributes.ReferenceTypeConstraint);

        // Use the IsGenericMethod property to find out if a
        // dynamic method is generic, and IsGenericMethodDefinition
        // to find out if it defines a generic method.
        Console.WriteLine("Is DemoMethod generic? {0}",
            demoMethod.IsGenericMethod);
        Console.WriteLine("Is DemoMethod a generic method definition? {0}",
            demoMethod.IsGenericMethodDefinition);

        // Set parameter types for the method. The method takes
        // one parameter, and its type is specified by the first
        // type parameter, T.
        Type[] parms = {typeParameters[0]};
        demoMethod.SetParameters(parms);

        // Set the return type for the method. The return type is
        // specified by the second type parameter, U.
        demoMethod.SetReturnType(typeParameters[1]);

        // Generate a code body for the method. The method doesn't
        // do anything except return null.
        //
        ILGenerator ilgen = demoMethod.GetILGenerator();
        ilgen.Emit(OpCodes.Ldnull);
        ilgen.Emit(OpCodes.Ret);

        // Complete the type.
        Type dt = demoType.CreateType();

        // To bind types to a dynamic generic method, you must
        // first call the GetMethod method on the completed type.
        // You can then define an array of types, and bind them
        // to the method.
        MethodInfo m = dt.GetMethod("DemoMethod");
        Type[] typeArgs = {typeof(string), typeof(DemoMethodBuilder)};
        MethodInfo bound = m.MakeGenericMethod(typeArgs);
        // Display a string representing the bound method.
        Console.WriteLine(bound);

        // Save the assembly, so it can be examined with Ildasm.exe.
        demoAssembly.Save(asmName.Name + ".dll");
    }
}

/* This code example produces the following output:
Is DemoMethod generic? True
Is DemoMethod a generic method definition? True
DemoMethodBuilder DemoMethod[String,DemoMethodBuilder](System.String)
*/

Imports System.Reflection
Imports System.Reflection.Emit

Class DemoMethodBuilder
   
    Public Shared Sub Main()
        ' Creating a dynamic assembly requires an AssemblyName
        ' object, and the current application domain.
        '
        Dim asmName As New AssemblyName("DemoMethodBuilder1")
        Dim domain As AppDomain = AppDomain.CurrentDomain
        Dim demoAssembly As AssemblyBuilder = _
            domain.DefineDynamicAssembly(asmName, _
                AssemblyBuilderAccess.RunAndSave)

        ' Define the module that contains the code. For an 
        ' assembly with one module, the module name is the 
        ' assembly name plus a file extension.
        Dim demoModule As ModuleBuilder = _
            demoAssembly.DefineDynamicModule( _
                asmName.Name, _
                asmName.Name & ".dll")
      
        Dim demoType As TypeBuilder = demoModule.DefineType( _
            "DemoType", _
            TypeAttributes.Public Or TypeAttributes.Abstract)

        ' Define a Shared, Public method with standard calling
        ' conventions. Do not specify the parameter types or the
        ' return type, because type parameters will be used for 
        ' those types, and the type parameters have not been
        ' defined yet.
        Dim demoMethod As MethodBuilder = _
            demoType.DefineMethod("DemoMethod", _
                MethodAttributes.Public Or MethodAttributes.Static)

        ' Defining generic parameters for the method makes it a
        ' generic method. By convention, type parameters are 
        ' single alphabetic characters. T and U are used here.
        '
        Dim typeParamNames() As String = {"T", "U"}
        Dim typeParameters() As GenericTypeParameterBuilder = _
            demoMethod.DefineGenericParameters(typeParamNames)

        ' The second type parameter is constrained to be a 
        ' reference type.
        typeParameters(1).SetGenericParameterAttributes( _
            GenericParameterAttributes.ReferenceTypeConstraint)

        ' Use the IsGenericMethod property to find out if a
        ' dynamic method is generic, and IsGenericMethodDefinition
        ' to find out if it defines a generic method.
        Console.WriteLine("Is DemoMethod generic? {0}", _
            demoMethod.IsGenericMethod)
        Console.WriteLine("Is DemoMethod a generic method definition? {0}", _
            demoMethod.IsGenericMethodDefinition)

        ' Set parameter types for the method. The method takes
        ' one parameter, and its type is specified by the first
        ' type parameter, T.
        Dim params() As Type = {typeParameters(0)}
        demoMethod.SetParameters(params)

        ' Set the return type for the method. The return type is
        ' specified by the second type parameter, U.
        demoMethod.SetReturnType(typeParameters(1))

        ' Generate a code body for the method. The method doesn't
        ' do anything except return Nothing.
        '
        Dim ilgen As ILGenerator = demoMethod.GetILGenerator()
        ilgen.Emit(OpCodes.Ldnull)
        ilgen.Emit(OpCodes.Ret)

        ' Complete the type.
        Dim dt As Type = demoType.CreateType()

        ' To bind types to a dynamic generic method, you must 
        ' first call the GetMethod method on the completed type.
        ' You can then define an array of types, and bind them
        ' to the method.
        Dim m As MethodInfo = dt.GetMethod("DemoMethod")
        Dim typeArgs() As Type = _
            {GetType(String), GetType(DemoMethodBuilder)}
        Dim bound As MethodInfo = m.MakeGenericMethod(typeArgs)
        ' Display a string representing the bound method.
        Console.WriteLine(bound)

        ' Save the assembly, so it can be examined with Ildasm.exe.
        demoAssembly.Save(asmName.Name & ".dll")
    End Sub  
End Class 

' This code example produces the following output:
'Is DemoMethod generic? True
'Is DemoMethod a generic method definition? True
'DemoMethodBuilder DemoMethod[String,DemoMethodBuilder](System.String)

Açıklamalar

yönteminin DefineGenericParameters çağrılsı geçerli yöntemi genel yapar. Bu değişikliği geri almanın hiçbir yolu yoktur. Bu yöntemin ikinci kez çağrılarak bir neden InvalidOperationException olur.

Genel yöntemin tür parametreleri daha sonra yöntemi kullanılarak GetGenericArguments alınabilirsiniz.

Kural gereği, tür parametresi adı tek bir büyük harftir.

Daha fazla bilgi için MethodBase.IsGenericMethod ve MethodInfo.GetGenericMethodDefinition bölümlerine bakın. Genel türler hakkında bilgi için Type.IsGenericType bkz. .

Şunlara uygulanır