Question

I have a line item like :

//FirstString/Second[001]/LastString

I need to replace [001] to [002] using Xpath.

After replacement the line item should look like :

//FirstString/Second[002]/LastString

I tried this in C# as follows :

   if (xpath.Contains("/Second") && xpath.Contains("["))
      {
        xpath = xpath.Remove(xpath.IndexOf("[")).Trim();
        xpath = xpath.Replace("Second", "Second[002]");

      }

But it is not working properly.

The result that I am getting : //FirstString/Second[002]

Instead of //FirstString/Second[002]/LastString

Any thoughts?

Thanks in Advance.

Answer 1

Regex solution:

var input = "//FirstString/Second[001]/LastString";

var result = Regex.Replace(input, @"(?<=Second\[)\d+(?=\])", "002");

---

string[] input = {
                        "//FirstString/Second[001]/LastString", 
                        "FirstString/Second[003]/LastString", 
                        "FirstString/Second[004]/LastString"
                    };

var result = input.Select(s => Regex.Replace(s, @"(?<=Second\[)\d+(?=\])", "002"));

foreach (var s in result)
{
    Console.WriteLine(s);
}