如何测试表达式的相等性 [英] How to test expressions equality

问题描述

可能重复：

最有效的方法来测试lambda表达式的相等性

如何检查两个Expression< Func< T，bool>>相同

如何测试这两个表达式与此示例相同

How to test that two expressions are the same like this sample

        string firstname = "Ahmed";
        Expression<Func<string, bool>> exp1 = (s) => s.Contains(firstname);
        Expression<Func<string, bool>> exp2 = (s) => s.Contains(firstname);

        Console.WriteLine(exp1 == exp2);//print false as two references are no equal

现在如何确保expression1等于expression2，因为它们具有相同的条件？

now how to ensure that expression1 equals to expression2 , as they have the same criteria?

推荐答案

是 ExpressionEqualityComparer 的代码，可以显示如何执行。

Here is the code for ExpressionEqualityComparer which can show how to do it.

https://source.db4o.com/db4o/trunk/db4o .net / Db4objects.Db4o.Linq / Db4objects.Db4o.Linq /表达式/

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