Type.IsGenericParameter Type.IsGenericParameter Type.IsGenericParameter Type.IsGenericParameter Property

定義

取得值,指出目前的 Type 是否表示泛型類型或泛型方法定義中的類型參數。Gets a value indicating whether the current Type represents a type parameter in the definition of a generic type or method.

public:
 virtual property bool IsGenericParameter { bool get(); };
public virtual bool IsGenericParameter { get; }
member this.IsGenericParameter : bool
Public Overridable ReadOnly Property IsGenericParameter As Boolean

屬性值

如果 Type 物件表示泛型型別或泛型方法定義中的型別參數,則為 true,否則為 falsetrue if the Type object represents a type parameter of a generic type definition or generic method definition; otherwise, false.

範例

下列範例會使用IsGenericParameter来測試是否為泛型類型的泛型型別參數的屬性。The following example uses the IsGenericParameter property to test for generic type parameters in a generic type.

if ( t->IsGenericType )
{
   
   // If this is a generic type, display the type arguments.
   //
   array<Type^>^typeArguments = t->GetGenericArguments();
   Console::WriteLine( L"\tList type arguments ({0}):",
      typeArguments->Length );
   System::Collections::IEnumerator^ myEnum =
      typeArguments->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Type^ tParam = safe_cast<Type^>(myEnum->Current);
      
      // If this is a type parameter, display its
      // position.
      //
      if ( tParam->IsGenericParameter )
      {
         Console::WriteLine(
            L"\t\t{0}\t(unassigned - parameter position {1})",
            tParam, tParam->GenericParameterPosition );
      }
      else
      {
         Console::WriteLine( L"\t\t{0}", tParam );
      }
   }
}
if (t.IsGenericType)
{
    // If this is a generic type, display the type arguments.
    //
    Type[] typeArguments = t.GetGenericArguments();

    Console.WriteLine("\tList type arguments ({0}):", 
        typeArguments.Length);

    foreach (Type tParam in typeArguments)
    {
        // If this is a type parameter, display its
        // position.
        //
        if (tParam.IsGenericParameter)
        {
            Console.WriteLine("\t\t{0}\t(unassigned - parameter position {1})",
                tParam,
                tParam.GenericParameterPosition);
        }
        else
        {
            Console.WriteLine("\t\t{0}", tParam);
        }
    }
}
If t.IsGenericType Then
    ' If this is a generic type, display the type arguments.
    '
    Dim typeArguments As Type() = t.GetGenericArguments()
    
    Console.WriteLine(vbTab & "List type arguments (" _
        & typeArguments.Length & "):")
    
    For Each tParam As Type In typeArguments
        ' If this is a type parameter, display its position.
        '
        If tParam.IsGenericParameter Then
            Console.WriteLine(vbTab & vbTab & tParam.ToString() _
                & vbTab & "(unassigned - parameter position " _
                & tParam.GenericParameterPosition & ")")
        Else
            Console.WriteLine(vbTab & vbTab & tParam.ToString())
        End If
    Next tParam
End If

備註

Type 物件表示泛型型別參數,可由呼叫GetGenericArguments方法Type物件,代表泛型類型定義,或有GetGenericArguments方法MethodInfo物件,代表泛型方法定義。Type objects that represent generic type parameters can be obtained by calling the GetGenericArguments method of a Type object that represents a generic type definition, or the GetGenericArguments method of a MethodInfo object that represents a generic method definition.

  • 泛型型別或方法定義IsGenericParameter屬性會傳回true產生陣列的每個項目。For a generic type or method definition, the IsGenericParameter property returns true for every element of the resulting array.

  • 封閉式建構的類型或方法,如IsGenericParameter屬性會傳回false所傳回的陣列的每個項目的GetGenericArguments方法。For a closed constructed type or method, the IsGenericParameter property returns false for every element of the array returned by the GetGenericArguments method.

  • 對於開放式建構的類型或方法,陣列的某些項目可能是特定類型而有些則可能是型別參數。For an open constructed type or method, some elements of the array might be specific types and others might be type parameters. IsGenericParameter 會傳回false類型和true的型別參數。IsGenericParameter returns false for the types and true for the type parameters. 程式碼範例ContainsGenericParameters屬性示範混用型別和型別參數的泛型類別。The code example for the ContainsGenericParameters property demonstrates a generic class with a mixture of types and type parameters.

如需泛型反映中所使用之規範的恆成立條件清單,請參閱 IsGenericType 屬性備註。For a list of the invariant conditions for terms used in generic reflection, see the IsGenericType property remarks.

適用於

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