如何从字符串在C＃中提取十进制数 [英] how do extract decimal number from string in c#

问题描述

string sentence = "X10 cats, Y20 dogs, 40 fish and 1 programmer.";

 string[] digits = Regex.Split (sentence, @"\D+");

这段代码我得到的数字数组值这样10,20,40,1

for this code i get values in digits array like this 10,20,40,1

string sentence = "X10.4 cats, Y20.5 dogs, 40 fish and 1 programmer.";

 string[] digits = Regex.Split (sentence, @"\D+");

这段代码我得到的数字数组值这样10,4,20,5,40， 1

for this code i get values in digits array like this 10,4,20,5,40,1

但我喜欢得到这样10.4,20.5,40,1十进制数我怎样才能做到这一点。

but i like to get like this 10.4,20.5,40,1 in decimal numbers how can i do this.

推荐答案

小的改进，以@迈克尔的解决方案：

Small improvement to @Michael's solution:

// NOTES: about the LINQ:
// .Where() == filters the IEnumerable (which the array is)
//     (c=>...) is the lambda for dealing with each element of the array
//     where c is an array element.
// .Trim()  == trims all blank spaces at the start and end of the string
var doubleArray = Regex.Split(sentence, @"[^0-9\.]+")
    .Where(c => c != "." && c.Trim() != "");

返回：

Returns:

10.4
20.5
40
1

原来的溶液回

[empty line here]
10.4
20.5
40
1
.

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