从字符串c＃中提取double值 [英] Extracting double value from a string c#

问题描述

 我想从我的字符串中提取双倍

 I want to extract the double from my string

buff = "VA VV_CELL1 3.55"

当我使用以下代码时：

When i use the following code:

private void GetLine(string msg, string buff, double numb)
    {
        comPort.WriteLine(msg); 
        Thread.Sleep(50);
        buff = comPort.ReadExisting();
        Thread.Sleep(50);
        MatchCollection matches = Regex.Matches(buff, @".*?([-]{0,1} *\d+.\d+)");
        List<double> doubles = new List<double>();
        foreach (Match match in matches)
        {
            string value = match.Groups[1].Value;
            value = value.Replace(" ", "");
            doubles.Add(double.Parse(value));
            Thread.Sleep(200);
            numb = doubles[0];                
        } 

此代码适用于我的其他字符串，但"CELL1"包含一个数字，所以我没有得到想要的值"3.55"任何想法？

This code work for my other strings but "CELL1" contains a number so i dont get the wanted value "3.55" any ideas?

推荐答案

这将反对buff中提供的值。

This will work against the value provide in buff.

var buff = "VA VV_CELL1 3.55";
var result = System.Text.RegularExpressions.Regex.Replace(buff, "[^0-9.]", "");
double value;
if (double.TryParse(result, out value))
{
    MessageBox.Show(

" {value}"）;
}
else
{
MessageBox.Show （"不是有效的双倍"）;
}

"{value}"); } else { MessageBox.Show("Not a valid double"); }

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