VB.NET NativeActivity<TResult>类代码示例

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本文整理汇总了VB.NET中System.Activities.NativeActivity<TResult>类的典型用法代码示例。如果您正苦于以下问题：VB.NET NativeActivity<TResult>类的具体用法？VB.NET NativeActivity<TResult>怎么用？VB.NET NativeActivity<TResult>使用的例子？那么恭喜您, 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NativeActivity<TResult>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，您的评价将有助于我们的系统推荐出更棒的VB.NET代码示例。

示例1: Execute

Public NotInheritable Class ReadInt
    Inherits NativeActivity(Of Integer)
    
    <RequiredArgument()>
    Property BookmarkName() As InArgument(Of String)

    Protected Overrides Sub Execute(ByVal context As NativeActivityContext)
        Dim name As String
        name = BookmarkName.Get(context)

        If name = String.Empty Then
            Throw New ArgumentException("BookmarkName cannot be an Empty string.",
                "BookmarkName")
        End If

        context.CreateBookmark(name, New BookmarkCallback(AddressOf OnReadComplete))
    End Sub

    ' NativeActivity derived activities that do asynchronous operations by calling 
    ' one of the CreateBookmark overloads defined on System.Activities.NativeActivityContext 
    ' must override the CanInduceIdle property and return True.
    Protected Overrides ReadOnly Property CanInduceIdle As Boolean
        Get
            Return True
        End Get
    End Property

    Sub OnReadComplete(ByVal context As NativeActivityContext, ByVal bookmark As Bookmark, ByVal state As Object)
        Result.Set(context, Convert.ToInt32(state))
    End Sub

End Class

开发者ID:VB.NET开发者，项目名称:System.Activities，代码行数:32，代码来源:NativeActivity

注：本文中的System.Activities.NativeActivity<TResult>类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。