VB.NET GotoExpression类代码示例

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本文整理汇总了VB.NET中System.Linq.Expressions.GotoExpression类的典型用法代码示例。如果您正苦于以下问题：VB.NET GotoExpression类的具体用法？VB.NET GotoExpression怎么用？VB.NET GotoExpression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GotoExpression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: Type

' Add the following directive to your file:
' Imports System.Linq.Expressions  

' A label expression of the void type that is the target for the GoToExpression.
Dim returnTarget As LabelTarget = Expression.Label()

' This block contains a GotoExpression.
' It transfers execution to a label expression that is initialized with the same LabelTarget as the GotoExpression.
' The types of the GotoExpression, label expression, and LabelTarget must match.
Dim blockExpr As BlockExpression =
      Expression.Block(
          Expression.Call(GetType(Console).GetMethod("WriteLine", New Type() {GetType(String)}), Expression.Constant("GoTo")),
          Expression.Goto(returnTarget),
          Expression.Call(GetType(Console).GetMethod("WriteLine", New Type() {GetType(String)}), Expression.Constant("Other Work")),
          Expression.Label(returnTarget)
      )

' The following statement first creates an expression tree,
' then compiles it, and then runs it.
Expression.Lambda(Of Action)(blockExpr).Compile()()

开发者ID:VB.NET开发者，项目名称:System.Linq.Expressions，代码行数:20，代码来源:GotoExpression

输出：

GoTo

"Other Work" is not printed because 
the Return expression transfers execution from Expression.GoTo(returnTarget)
to Expression.Label(returnTarget).

注：本文中的System.Linq.Expressions.GotoExpression类示例整理自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。