本文整理汇总了VB.NET中System.ComponentModel.Composition.ImportAttribute类的典型用法代码示例。如果您正苦于以下问题：VB.NET ImportAttribute类的具体用法？VB.NET ImportAttribute怎么用？VB.NET ImportAttribute使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了ImportAttribute类的1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: Main
'Default export infers type and contract name from the
'exported type. This is the preferred method.
<Export()>
Public Class MyExport1
Public ReadOnly Property data As String
Get
Return "Test Data 1."
End Get
End Property
End Class
Public Class MyImporter1
<Import()>
Public Property ImportedMember As MyExport1
End Class
Public Interface MyInterface
End Interface
'Specifying the contract type may be important if
'you want to export a type other then the base type,
'such as an interface.
<Export(GetType(MyInterface))>
Public Class MyExport2
Implements MyInterface
Public ReadOnly Property data As String
Get
Return "Test Data 2."
End Get
End Property
End Class
Public Class MyImporter2
'The import must match the contract type!
<Import(GetType(MyInterface))>
Public Property ImportedMember As MyExport2
End Class
'Specifying a contract name should only be
'needed in rare caes. Usually, using metadata
'is a better approach.
<Export("MyContractName", GetType(MyInterface))>
Public Class MyExport3
Implements MyInterface
Public ReadOnly Property data As String
Get
Return "Test Data 3."
End Get
End Property
End Class
Public Class MyImporter3
'Both contract name and type must match!
<Import("MyContractName", GetType(MyInterface))>
Public Property ImportedMember As MyExport3
End Class
Sub Main()
Dim catalog As AggregateCatalog = New AggregateCatalog()
catalog.Catalogs.Add(New AssemblyCatalog(GetType(MyExport1).Assembly))
Dim container As CompositionContainer = New CompositionContainer(catalog)
Dim test1 As MyImporter1 = New MyImporter1()
Dim test2 As MyImporter2 = New MyImporter2()
Dim test3 As MyImporter3 = New MyImporter3()
container.SatisfyImportsOnce(test1)
container.SatisfyImportsOnce(test2)
container.SatisfyImportsOnce(test3)
Console.WriteLine(test1.ImportedMember.data)
Console.WriteLine(test2.ImportedMember.data)
Console.WriteLine(test3.ImportedMember.data)
Console.ReadLine()
End Sub