字符串值转换为运营​​商在C＃ [英] Convert string value to operator in C#

问题描述

林试图找出一种方法来动态地构建一个条件。

Im trying to figure out a way to build a conditional dynamically.

在例如

var greaterThan = ">";
var a = 1;
var b = 2;

if(a Convert.ToOperator(greaterThan) b) {...}

我没有看到这篇文章，但无法完全理解如何实现一些东西。
C＃转换字符串用在逻辑条件

I did read this post but could not quite understand how to implement some of the stuff. C# convert a string for use in a logical condition

肛建议表示高度赞赏。

感谢

推荐答案

我不打算将它张贴，但认为它可能有一定的帮助。假设，当然，你并不需要在乔恩的职位先进的通用逻辑。

I wasn't going to post it, but thought that it might be of some help. Assuming of course that you don't need the advanced generic logic in Jon's post.

public static class Extension
{
    public static Boolean Operator(this string logic, int x, int y)
    {
        switch (logic)
        {
            case ">": return x > y;
            case "<": return x < y;
            case "==": return x == y;
            default: throw new Exception("invalid logic");
        }
    }
}

您可以使用类似的代码这一点，与 GREATERTHAN 是一个字符串与想要的逻辑/操作员。

You could use the code like this, with greaterThan being a string with the wanted logic/operator.

if (greaterThan.Operator(a, b))

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