MethodBuilder.MakeGenericMethod(Type[]) Metod

public:
 override System::Reflection::MethodInfo ^ MakeGenericMethod(... cli::array <Type ^> ^ typeArguments);

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("The native code for this instantiation might not be available at runtime.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("If some of the generic arguments are annotated (either with DynamicallyAccessedMembersAttribute, or generic constraints), trimming can't validate that the requirements of those annotations are met.")]
public override System.Reflection.MethodInfo MakeGenericMethod(params Type[] typeArguments);

public override System.Reflection.MethodInfo MakeGenericMethod(params Type[] typeArguments);

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("If some of the generic arguments are annotated (either with DynamicallyAccessedMembersAttribute, or generic constraints), trimming can't validate that the requirements of those annotations are met.")]
public override System.Reflection.MethodInfo MakeGenericMethod(params Type[] typeArguments);

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("The native code for this instantiation might not be available at runtime.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("If some of the generic arguments are annotated (either with DynamicallyAccessedMembersAttribute, or generic constraints), trimming can't validate that the requirements of those annotations are met.")>]
override this.MakeGenericMethod : Type[] -> System.Reflection.MethodInfo

override this.MakeGenericMethod : Type[] -> System.Reflection.MethodInfo

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("If some of the generic arguments are annotated (either with DynamicallyAccessedMembersAttribute, or generic constraints), trimming can't validate that the requirements of those annotations are met.")>]
override this.MakeGenericMethod : Type[] -> System.Reflection.MethodInfo

Public Overrides Function MakeGenericMethod (ParamArray typeArguments As Type()) As MethodInfo

Parametrar

Returer

En MethodInfo som representerar den generiska metod som skapats från den aktuella generiska metoddefinitionen med de angivna argumenten av allmän typ.

Attribut

RequiresDynamicCodeAttribute RequiresUnreferencedCodeAttribute

Exempel

I följande kodexempel skapas en konstruerad metod från en ofullständig generisk metoddefinition i en ofullständig typ.

Exemplet skapar en tillfällig sammansättning och modul med en enda typ, lägger till en metod Moch gör metoden generisk genom att lägga till en typparameter T med hjälp av DefineGenericParameters metoden. Typparametern används som typ av metodens parameter och även som returtyp. Den generiska metoddefinitionen ges inte en brödtext och den omslutande typen har inte slutförts. Metoden MakeGenericMethod används sedan för att göra den konstruerade metoden M<String> (M(Of String) i Visual Basic). Exempelkoden har inga utdata eftersom underklassen MethodInfo för som MakeGenericMethod returneras av metoden inte tillåter reflektion över dess parametrar.

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

class Example
{
    public static void Main()
    {
        // Define a transient dynamic assembly (only to run, not
        // to save) with one module and a type "Test".
        //
        AssemblyName aName = new AssemblyName("MyDynamic");
        AssemblyBuilder ab =
            AppDomain.CurrentDomain.DefineDynamicAssembly(
                aName,
                AssemblyBuilderAccess.Run);
        ModuleBuilder mb = ab.DefineDynamicModule(aName.Name);
        TypeBuilder tb = mb.DefineType("Test");

        // Add a public static method "M" to Test, and make it a
        // generic method with one type parameter named "T").
        //
        MethodBuilder meb = tb.DefineMethod("M",
            MethodAttributes.Public | MethodAttributes.Static);
        GenericTypeParameterBuilder[] typeParams =
            meb.DefineGenericParameters(new string[] { "T" });

        // Give the method one parameter, of type T, and a
        // return type of T.
        meb.SetParameters(typeParams);
        meb.SetReturnType(typeParams[0]);

        // Create a MethodInfo for M<string>, which can be used in
        // emitted code. This is possible even though the method
        // does not yet have a body, and the enclosing type is not
        // created.
        MethodInfo mi = meb.MakeGenericMethod(typeof(string));
        // Note that this is actually a subclass of MethodInfo,
        // which has rather limited capabilities -- for
        // example, you cannot reflect on its parameters.
    }
}

Imports System.Reflection
Imports System.Reflection.Emit

Class Example

    Public Shared Sub Main()
    
        ' Define a transient dynamic assembly (only to run, not
        ' to save) with one module and a type "Test".
        ' 
        Dim aName As AssemblyName = New AssemblyName("MyDynamic")
        Dim ab As AssemblyBuilder = _
            AppDomain.CurrentDomain.DefineDynamicAssembly( _
                aName, _
                AssemblyBuilderAccess.Run)
        Dim mb As ModuleBuilder = ab.DefineDynamicModule(aName.Name)
        Dim tb As TypeBuilder = mb.DefineType("Test")

        ' Add a Public Shared method "M" to Test, and make it a
        ' generic method with one type parameter named "T").
        '
        Dim meb As MethodBuilder = tb.DefineMethod("M", _
            MethodAttributes.Public Or MethodAttributes.Static)
        Dim typeParams() As GenericTypeParameterBuilder = _
            meb.DefineGenericParameters(New String() { "T" })

        ' Give the method one parameter, of type T, and a 
        ' return type of T.
        meb.SetParameters(typeParams)
        meb.SetReturnType(typeParams(0))

        ' Create a MethodInfo for M(Of String), which can be used 
        ' in emitted code. This is possible even though the method
        ' does not yet have a body, and the enclosing type is not
        ' created.
        Dim mi As MethodInfo = _
            meb.MakeGenericMethod(GetType(String))
        ' Note that this is actually a subclass of MethodInfo, 
        ' which has rather limited capabilities -- for
        ' example, you cannot reflect on its parameters.
    End Sub
End Class

Kommentarer

När du genererar dynamisk kod kan du behöva skicka ett anrop till en metod som skapats från den generiska metoddefinitionen som representeras av en MethodBuilder, innan omslutningstypen har slutförts. Du kan använda MakeGenericMethod metoden för att skapa en MethodInfo för en sådan konstruerad metod och använda MethodInfo i det avgivna anropet.

Se även

• Gör så här: Definiera en generisk metod med reflektionsemitta