C# regular expression

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Hi everyone,

Can someone help me write a C# regular expression to extract "2.224 KB" from the following string @{AnyText=2.224 KB (2,277 bytes)

Regards
Sebastian

Posted 17-Jan-13 23:05pm

Sebastian T Xavier

Updated 17-Jan-13 23:06pm

v2

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Andreas Gieriet · Answer 1 · 2013-01-20T09:04:00

How about:

C#

...
string input = ...;
Match match = Regex.Match(input, @"\w+\s*=\s*(\d+(?:\.\d+)?\s*[A-Z]+)");
string size = match.Success ? match.Groups[1].Value : string.Empty;
...

Depends very much on the input string if the @ and { are relevant to properly match the text.

Note: If you need to be culture aware, the whole regex becomes far more difficult: decimal separator and thousand separator may be rather "weird" in versious cultures (e.g. some scandinavian language, the thousand separator is some kind of space...). In that case, you need to be a bit more fuzzy, e.g. @"\w+\s*=\s*(.*?\s*[A-Z][A-Z])".

Cheers
Andi

*dan!sh* · Answer 2 · 2013-01-17T23:10:00

Solution 1

More information is required before this can be answered appropriately.

Assumptions:
1. String always remains like: "@{AnyText=< SizeInKBHere > (2,277 bytes)"
2. This is the total string and not a part of a huge string.

You can get substring from the string provided.
1. Get the index of "=" and second space.
2. Using information from #1, get the substring starting after "=" till second space.

Posted 17-Jan-13 23:10pm

dan!sh

Updated 17-Jan-13 23:11pm

v2

Comments

Sebastian T Xavier 18-Jan-13 5:11am

string is not same always, see the updated question. this is the whole string.

dan!sh 18-Jan-13 5:14am

My response still stays valid assuming "AnyText" will not have "=" sign.

Sebastian T Xavier 18-Jan-13 5:22am

I can try the following code, but looking for a better approach...

String stra = "@{TotalItemSize=2.224 KB (2,277 bytes)";
int startindex = 0;
int endindex = 0;
string result = "";
startindex = stra.IndexOf("=")+1;
endindex = stra.IndexOf(" (");
result = stra.Substring(startindex, endindex-startindex );