MethodBuilder.SetReturnType(Type) 方法
定義
重要
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設定方法的傳回型別。
public:
void SetReturnType(Type ^ returnType);
public void SetReturnType (Type? returnType);
public void SetReturnType (Type returnType);
member this.SetReturnType : Type -> unit
Public Sub SetReturnType (returnType As Type)
參數
例外狀況
目前的方法是泛型,但不是泛型方法定義。 亦即,IsGenericMethod 屬性是 true
,但 IsGenericMethodDefinition 屬性是 false
。
範例
下列程式代碼範例會 DefineGenericParameters 使用 方法建立方法泛型。 方法 SetParameters 可用來提供方法一個參數,其類型將由第一個泛型型別參數指定。 方法 SetReturnType 可用來提供方法傳回型別,由第二個泛型型別參數所指定。
此程式代碼是為方法提供之較大範例的 DefineGenericParameters 一部分。
// 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);
// 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);
' 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)
// 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]);
// 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]);
' 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))
備註
當方法的其中一個泛型型別參數指定傳回型別時,請使用這個方法來設定泛型方法的傳回型別。 如果傳回類型具有選擇性或必要的自定義修飾詞,例如 IsConst,請使用 SetSignature(Type, Type[], Type[], Type[], Type[][], Type[][]) 方法多載。
呼叫這個方法會取代使用 方法建立的傳回型別 TypeBuilder.DefineMethod 。