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C# LabelTarget类代码示例

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


LabelTarget类属于System.Linq.Expressions命名空间,在下文中一共展示了LabelTarget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C#代码示例。

示例1: typeof

// Add the following directive to the file:
// using System.Linq.Expressions;  

// A label expression of the void type that is the target for Expression.Return().
LabelTarget returnTarget = 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.
BlockExpression blockExpr =
    Expression.Block(
        Expression.Call(typeof(Console).GetMethod("WriteLine", new Type[] { typeof(string) }), Expression.Constant("Return")),
        Expression.Return(returnTarget),
        Expression.Call(typeof(Console).GetMethod("WriteLine", new Type[] { typeof(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<Action>(blockExpr).Compile()();
开发者ID:.NET开发者,项目名称:System.Linq.Expressions,代码行数:20,代码来源:LabelTarget

输出:

Return

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


注:本文中的System.Linq.Expressions.LabelTarget类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。