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VB.NET Expression.Return方法代码示例

本文整理汇总了VB.NET中System.Linq.Expressions.Expression.Return方法的典型用法代码示例。如果您正苦于以下问题:VB.NET Expression.Return方法的具体用法?VB.NET Expression.Return怎么用?VB.NET Expression.Return使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在System.Linq.Expressions.Expression的用法示例。


在下文中一共展示了Expression.Return方法的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: Type

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

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

' This block contains a GotoExpression that represents a return statement with no value.
' 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("Return")),
          Expression.Return(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:Expression.Return

输出:

Return

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


注:本文中的System.Linq.Expressions.Expression.Return方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,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。