Question

I need a regular express for :
letter number letter number letter number format.
eg : "E7R8R9".
Below is my code:

string txt = "G1R1A3";
// Any Single Word Character (Not Whitespace) 1
string re1 = "[a-z][0-9][a-z][0-9][a-z][0-9]";

Regex r = new Regex(re1, RegexOptions.IgnoreCase | RegexOptions.Singleline);
Match m = r.Match(txt);
if (m.Success)
{
    String w1 = m.Groups[1].ToString();
    Console.Write("(" + w1.ToString() + ")" + "\n");
}
Console.ReadLine();

But this code matches "GG1R1A3" this also.
Please help.

Answer 1

Your code is searching for the pattern anywhere within your string. If you want to anchor it to the start (and end) of the string, use ^ and $:

    string re1 = "^[a-z][0-9][a-z][0-9][a-z][0-9]$";