[RESOLVED] Regular Expression Help

[RohanWest]

Hi, i'm having some problems with regualr expressions,

how can i write a regualr expression so that the following string

strInput = "Hello:World";
strMatch = @"[^:]*:";

foreach(System.Text.RegularExpressions.Match m in System.Text.RegularExpressions.Regex.Matches(strInput,strMatch))
{
	Console.WriteLine(m.Value);
}

it provides two matches 'Hello' and 'World'

Thanks

Rohan

[BramVandenbon]

Are you sure you want to do it with regular expressions? I would do it with the split function.

String[] seperators = new String[1];
seperators[0] = ":";
String[] results = strInput.Split(seperators);

I usually do a Trim() before and after to remove spaces before and after the text. And there are also some interesting parameters like this one:

Split(seperators, StringSplitOptions.RemoveEmptyEntries)

This for cases like "sometext::sometext2".

I hope this helps. Ofcourse if this makes part of something bigger and more complicated, I can see why you want to use regular expressions anyway. But remember regular expressions are heavy on the processor.

[BramVandenbon]

Oh and if you want to display them:

foreach (String s in results){
  Console.Writeline(s);
}

or

for(int i=0;i<results.Length;i++){
  Console.Writeline(s[i]);
}

But I guess you know that But just to make it complete

[RohanWest]

Hi thanks for the reply,

I was trying to combine it with another regular expression, i have worked out how to do it now... here is the whole thing

string strInput = @"[Resource:Name]\MyDirectory\[Demo:Application].exe";
string strMatch = @"(?<PlaceHolder>\[(?<Resource>[^\:]*):(?<Key>[^\]]*)[\]])";

foreach(System.Text.RegularExpressions.Match m in System.Text.RegularExpressions.Regex.Matches(strInput,strMatch))
{
	Console.WriteLine(m.Groups["PlaceHolder"].Value);
	Console.WriteLine(m.Groups["Resource"].Value);
	Console.WriteLine(m.Groups["Key"].Value);

}

This outputs

[Resource:Name]
Resource
Name
[Demo:Application]
Demo
Application

By using these groups i can look up the required resource and replace the 'PlaceHolder' in the original string

Thanks

Rohan