Convert.ToDouble非数字字符串 [英] Convert.ToDouble non-numeric string

问题描述

我要提取出一些可能含有非数字字符

I want to extract the number out of a string that might contain non-numeric characters

我想一个字符串 Convert.ToDouble（正则表达式.Replace（数据[I]的ToString（），@答案这里，））;

示例字符串：<$ 。C $ C>wd123.321dw
想要得到123.321出了

Example string: "wd123.321dw" Want to get 123.321 out of that.

另外：我们-123.321ew为-123.321

Also for negatives: "we-123.321ew" for -123.321

任何线索？

推荐答案

像这样的事情？

        string n = "wd123.321dw";
        var regNumber = new Regex(@"\-?\d+\.?\d+");

        var match = regNumber.Match(n);
        if ( match.Success )
        {
            double d;
            if ( Double.TryParse(match.Value, out d) )
            {
                Console.WriteLine("The number is: {0}",d);
            }
        }

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