How do I parse a string using C# and regular expressions?

Question

How do I convert the string:

"Microsoft Windows XP Professional x64 Edition|C:\\\\WINDOWS|\\\\Device\\\\Harddisk4\\\\Partition1"

to

"Microsoft Windows XP Professional x64 Edition"

...using regular expressions?

I want to cut out all after | symbol. Is it easy to realise it via Regex.Replace ? Where could I found syntax description for Regex.Replace patterns?

Answer 1

You don't need a Regex for that. You can use substring:

var text = @"Microsoft Windows XP Professional x64 Edition|C:\WINDOWS|\Device\Harddisk4\Partition1";
text = text.Substring(0,text.IndexOf("|"));

Answer 2

string str = @"Microsoft Windows XP Professional x64 Edition|C:\WINDOWS|\Device\Harddisk4\Partition1";
string str2 = str.Split('|')[0];

str2 = "Microsoft Windows XP Professional x64 Edition"

Answer 3

If you're determined to use a regular expression:

Regex p = new Regex(@"([^|]*)|");
string s = @"Microsoft Windows XP Professional x64 Edition|C:\\WINDOWS|\\Device\\Harddisk4\\Partition1";
s = p.Match(s).Value;

Answer 4

使用String.Split（），它产生一个String []，然后选择零元素。

Answer 5

string GetOSType(string data)
{
      return data.Split(Convert.ToChar("|"))[0];
}

this is assuming the string is ALWAYS going to split. Probably to be sure you would want to wrap a try - catch block around this function.

Answer 6

如果您仍然想了解有关正则表达式的更多信息，这里有一个不错的备忘单和一个简单的在线正则表达式生成器工具 ，可以帮助您入门。

Answer 7

A simple solution may be to use:

    string szOrig = "Microsoft Windows XP Professional x64 Edition|C:\\WINDOWS|\\Device\\Harddisk4\\Partition1";
    string[] separator = new string[] { "|" };
    string[] szTemp = szOrig.Split(separator, StringSplitOptions.RemoveEmptyEntries);
    string szRequired = szTemp[0];

May not be the best way, but works.