本文整理汇总了VB.NET中System.Type.GenericParameterPosition属性的典型用法代码示例。如果您正苦于以下问题：VB.NET Type.GenericParameterPosition属性的具体用法？VB.NET Type.GenericParameterPosition怎么用？VB.NET Type.GenericParameterPosition使用的例子？那么恭喜您, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类System.Type的用法示例。
在下文中一共展示了Type.GenericParameterPosition属性的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: Test
' 导入命名空间
Imports System.Reflection
Imports System.Collections.Generic
' Define a base class with two type parameters.
Public Class Base(Of T, U)
End Class
' Define a derived class. The derived class inherits from a constructed
' class that meets the following criteria:
' (1) Its generic type definition is Base<T, U>.
' (2) It uses int for the first type parameter.
' (3) For the second type parameter, it uses the same type that is used
' for the type parameter of the derived class.
' Thus, the derived class is a generic type with one type parameter, but
' its base class is an open constructed type with one assigned type
' parameter and one unassigned type parameter.
Public Class Derived(Of V)
Inherits Base(Of Integer, V)
End Class
Public Class Test
Public Shared Sub Main()
Console.WriteLine(vbCrLf _
& "--- Display a generic type and the open constructed")
Console.WriteLine(" type from which it is derived.")
' Create a Type object representing the generic type definition
' for the Derived type, by omitting the type argument. (For
' types with multiple type parameters, supply the commas but
' omit the type arguments.)
'
Dim derivedType As Type = GetType(Derived(Of ))
DisplayGenericTypeInfo(derivedType)
' Display its open constructed base type.
DisplayGenericTypeInfo(derivedType.BaseType)
End Sub
Private Shared Sub DisplayGenericTypeInfo(ByVal t As Type)
Console.WriteLine(vbCrLf & "{0}", t)
Console.WriteLine(vbTab & "Is this a generic type definition? " _
& t.IsGenericTypeDefinition)
Console.WriteLine(vbTab & "Is it a generic type? " _
& t.IsGenericType)
Console.WriteLine(vbTab _
& "Does it have unassigned generic parameters? " _
& t.ContainsGenericParameters)
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
' IsGenericParameter is true only for generic type
' parameters.
'
If tParam.IsGenericParameter Then
Console.WriteLine(vbTab & vbTab & tParam.ToString() _
& " (unassigned - parameter position " _
& tParam.GenericParameterPosition & ")")
Else
Console.WriteLine(vbTab & vbTab & tParam.ToString())
End If
Next tParam
End If
End Sub
End Class输出：
--- Display a generic type and the open constructed type from which it is derived. Derived`1[V] Is this a generic type definition? True Is it a generic type? True Does it have unassigned generic parameters? True List type arguments (1): V (unassigned - parameter position 0) Base`2[System.Int32,V] Is this a generic type definition? False Is it a generic type? True Does it have unassigned generic parameters? True List type parameters (2): System.Int32 V (unassigned - parameter position 0)
示例2: B
Public Class B(Of T, U)
End Class
Public Class A(Of V)
Public Function GetSomething(Of X)() As B(Of V, X)
Return New B(Of V, X)()
End Function
End Class