Question

In Visual Studio, I’m very curious to know the regular expression to replace:

MyLog.LogFatal("Error E20111205-1147. Custom error.\n");

with this:

MyLog.LogFatal("{0}Error E20111205-1147. Custom error.\n",TPrefix(this));

It has to work for any error number, i.e. E12345678-1234.

Update

I should have clarified my question: I want to alter my C# source code, within Visual Studio, using the “Find..Find and Replace..Quick Replace” (Ctrl-H) command. There is about 1,000 instances of this message in my C# source code tree, and it would take too long to edit it manually.

Answer 1

EDIT: Updated solution, complete Regex is

Starting with:

MyLog.LogFatal("Error E20111205-1147. Custom error.\n");

Find Expression:

// Matches MyLog.LogFatal(" {any text with 0-9, a-z, A-Z, space, -, . character 
//   and terminated by \n"} "); 
// Hence, the captured expression from your example is 
//   Error E20111205-1147. Custom error.\n"
MyLog.LogFatal\(\"{[0-9a-zA-Z -\\\.]+\\n\"}\);

Replace Expression:

// Replaces MyLog.LogFatal("{0} {your captured expression}, TPrefix(this));
MyLog.LogFatal(\"{0}\1, TPrefix(this));

You Get:

MyLog.LogFatal("{0}Error E20111205-1147. Custom error.\n", TPrefix(this));

For an introduction to VS2010 Regex Find and replace, please see this blog post.