打印表达式树 [英] Print expression tree

问题描述

嗨


我试图打印表达式树，但计算出的值是C＃。



我有一个方法：

Hi
I am trying to "print" the expression tree, but with the calculated values in C#.

I have a method:

public string GetElement(Expression<Predicate<T>> match)
        {
   ParameterExpression pe = Expression.Parameter(typeof(T), "s");
            BinaryExpression be = match.Body as BinaryExpression;

            var ExpressionTree = Expression.Lambda<Func<T, bool>>(match.Body, new[] { pe });
            return ExpressionTree;
}

如果我使用GetElement，它会正确显示（s => s.Name ==New York）但如果我尝试：

It shows correctly if I uses GetElement(s => s.Name == "New York") but if I try:

var name = "New York";
 GetElement(s=>s.Name == name) 

我得到s =>（s.Name == value（WpfTester.MainWindow） +<> c__DisplayClass0_0）.name）



我尝试过：



我只试过

I get "s => (s.Name == value(WpfTester.MainWindow+<>c__DisplayClass0_0).name)"

What I have tried:

I have only tried

Expression.Lambda<Func<T, bool>>(match.Body, new[] { pe });

推荐答案

在我的<中查看 LINQString.cs 文件a href =https://www.codeproject.com/Articles/375413/RaptorDB-The-Document-Store-2> RaptorDB - 文档存储 [ ^ ] project。

See the LINQString.cs file in my RaptorDB - The Document Store[^] project.

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