Regex pattern to match and replace a version number in a string c#

Question

I want to find replace Version number from a string by using Regex in c#.

string is like this:

string val="AA.EMEA.BizTalk.GroupNettingIntegrations, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a86ac114137740ef";

Is any one can help me to solve this problem.

That doesn't really make much sense about what you are trying to do, please be more specific — Bali C
– Bali C, Commented Aug 24, 2011 at 14:50

Tejs · Accepted Answer · 2011-08-24 14:51:04Z

2

It seems to me you could easily accomplish this without a regex and have your code be easier to read:

 string components[] = someAssemblyFullyQualifiedName.Split(new char[] { ',' }, StringSplitOptions.IgnoreEmptyEntires);

 if(components.Length > 1)
    components[1] = "Version=2.0.0.0"; // whatever you want to replace with

 string newFullyQualifiedName = string.Join(",", components):

answered Aug 24, 2011 at 14:51

Tejs

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user604613 Over a year ago

Was going to suggest something similar, you beat me to it (though you dont need to supply the "new char[] { ',' }" bit, just ',' is sufficient)

Kevin Kalitowski · Accepted Answer · 2011-08-24 15:19:05Z

1

The following Regex will do the replace you are looking for.

string val = "AA.EMEA.BizTalk.GroupNettingIntegrations, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a86ac114137740ef";
val = Regex.Replace(val, @"Version=[\d\.]+", "Version=2.0.0.0");

EDIT: You can also use look-behind Regex functionality if you don't want to have to put the "Version=" in the replacement string. If you are looking for that, add a comment and I'll draw it up.

edited Aug 24, 2011 at 15:19

answered Aug 24, 2011 at 15:01

Kevin Kalitowski

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2 Comments

syed adeel Over a year ago

val = Regex.Replace(val, @"Version=[\d\.]+", "Version=2.0.0.0"); it should be like this.

GoRoS Over a year ago

I'd use (\d+\.)(\d+\.)(\d+\.)(\d+) instead to be more precise for the regular expression. In yours you could allow "2." or whatever.

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