MethodBuilder.MakeGenericMethod(Type[]) 方法

定義

命名空間:

System.Reflection.Emit

組件:

System.Reflection.Emit.dll

傳回使用指定的泛型類型引數，從目前的泛型方法定義建構的泛型方法。

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

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

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

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

參數

typeArguments

Type[]

由 Type 物件組成的陣列，代表泛型方法的型別引數。

傳回

MethodInfo

MethodInfo，代表使用指定的泛型類型引數，從目前的泛型方法定義建構的泛型方法。

範例

下列程式代碼範例會從不完整類型的泛型方法定義建立建構的方法。

此範例會建立具有單一型別的暫時性元件和模組、新增方法 M，並使用 方法新增類型參數 T DefineGenericParameters 來建立方法泛型。 型別參數會當做方法參數的類型，以及做為其傳回型別。 泛型方法定義未指定主體，而且未完成封入類型。 然後會MakeGenericMethod使用 方法，在 Visual Basic) M(Of String) 中建立建構的方法 M<String> (。 範例程式代碼沒有輸出，因為方法所MakeGenericMethod傳回的MethodInfo子類別不允許反映其參數。

注意

如需使用 的另一個程式 MakeGenericMethod代碼範例，請參閱 DefineGenericParameters。 MakeGenericMethod 也會在使用泛型型別發出程式代碼時廣泛使用。 請參閱 如何：使用反映發出定義泛型方法。

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

void main()
{
    // Define a transient dynamic assembly (only to run, not
    // to save) with one module and a type "Test".
    // 
    AssemblyName^ aName = gcnew 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);
    array<GenericTypeParameterBuilder^>^ typeParams = 
        meb->DefineGenericParameters(gcnew array<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(String::typeid);
    // Note that this is actually a subclass of MethodInfo, 
    // which has rather limited capabilities -- for
    // example, you cannot reflect on its parameters.
}

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

備註

當您發出動態程式代碼時，您可能需要在封入類型完成之前，先從 所 MethodBuilder表示的泛型方法定義發出方法的呼叫。 您可以使用 MakeGenericMethod 方法建立 MethodInfo 這類建構方法的 ，並在發出的呼叫中使用 MethodInfo 。

另請參閱

• 作法：使用反映發出定義泛型方法