URL Replacement

In the second and third cases, since what you're trying to match is not immediately followed by an opening curly bracket, how do you know what you're trying to match?

For example in the second case, how do you know you're trying to match '/spm/kpi-setup/view/' and not '/spm/kpi-setup/' or '/spm/kpi-setup/view/preventative-analysis/' ?

Also, if it's not adjacent to what you're trying to match, how do you know what the replacement is? For example in the third case, how do you know it's '40526' and not 'corrective-actions' ?

Thanks for your solution..But it is not a generic solution.

Need to handle many cases.

Case 1:


Case 3:

Incidentally, if you want to know whether there was a match or not, you could change the URLReplace method so that it returns a bool rather than void:

Try this:

using System;
using System.Text.RegularExpressions;

class Test
{
   static void Main()
   {
      string browserURL= "/spm/kpi-setup/view/{spmkpiinstance}/preventative-analysis";
      string tobeInjectedURL = "/spm/kpi-setup/view/40526/corrective-actions/";
      URLReplace(ref browserURL, tobeInjectedURL);      
      Console.WriteLine(browserURL); 
      Console.ReadKey();
   }

   static void URLReplace(ref string browserURL, string tobeInjectedURL)
   {      
      string regExp = @"^(.*?)(\{.*?})(.*)$";
      Match m = Regex.Match(browserURL, regExp);
      string start = m.Groups[1].Value;
      if (tobeInjectedURL.StartsWith(start))
      {
        int len = start.Length;
        int index = tobeInjectedURL.IndexOf('/', len);      
        string replacement = tobeInjectedURL.Substring(len, index - len);
        browserURL = start + replacement + m.Groups[3].Value;
      }
   } 
}

The output should be:

/spm/kpi-setup/view/40526/preventative-analysis