Find and replace question regarding RegEx.Replace

Question

Hello,

I have a text file and I want to be able to change all instances of:

T1M6 to N1T1M6

The T will always be a different value depending on the text file loaded. So example it could sometimes be

T2M6
and that would need to be turned into
N2T2M6.

The N(value) must match the T(value). The M6 will always be M6.


Another example:

T9M6 would translate to N9T9M6

Here is my code to do the loading of the text file:

StreamReader reader = new StreamReader(fDialog.FileName.ToString());
string content = reader.ReadToEnd();
reader.Close();

Here is RegEx.Replace statement that I came up with. Not sure if it is right.

 content = Regex.Replace(content, @"(T([-\d.]))M6", "N1$1M6");

It seems to work at searching for T5M6 and turning it into N1T5M6.

But I am unsure how to turn the N(value) into the value that T is. For example N5T5M6.

Can someone please show me how to do modify my code to handle this?

Thanks.

Answer 1

Like this:

string content = File.ReadAllText(fDialog.FileName.ToString());
content = Regex.Replace(content, @"T([-\d.])M6", "N$1T$1M6");

Also, you should probably replace [-\d.] with \d or -?\d\.?