<p>This is my first real question of need for any of those Gridview experts out there in the .NET world.</p>

<p>I an creating a Gridview from codebehind and I am holding a bunch of numerical data in the columns.  Although, I do add the comma in the number fields from codebehind.  When I load it to the Gridview, I have the sorting ability turned on, BUT the gridview chooses to ALPHA sort rather than sorting numerically because I add in those commas.</p>

<p>So I need help.  Anyone willing to give this one a shot?  I need to change some of my columns in the gridview to numerical sort rather than the alpha sort it is using.</p>

If you do end up implementing your own comparer and sorting them as strings, the algorithm for treating numbers 'properly' is called Natural Sorting. Jeff wrote a pretty good entry on it here:
Sorting for Humans : Natural Sort Order
You can find a pretty good implementation in C# here:
http://www.codeproject.com/KB/string/NaturalSortComparer.aspx