Gridview-Grouping Data

[icanhelp33]

I am using a method to group data in Gridview. I am able to compare
one sortexpression with the gridview field. I would also like to
compare sortexpression2 with another gridviewfield. How is that
possible.

For example: GridView has FirstName,LastN ame,City

I would like to compare "FirstName" & "LastName" then set flag only
when both conditions are met.

private bool _SortedFlag = false;
private int _SortColumnInde x = -1;
private string _SortColumnHead er = "";

private void ResolveGrouping Data(string sortExpression1 , string
sortExpression2 )
{
foreach (DataControlFie ld field in gridCustomer.Co lumns)
{
if (field.SortExpr ession == sortExpression1 )
{
_SortedFlag = true;
_SortColumnInde x =
gridCustomer.Co lumns.IndexOf(f ield);
_SortColumnHead er = field.HeaderTex t;
break;
}
}
}