wpf grid sort data

how can a programmer using dapfor wpf gridcontrol to sort data by column used for grouping.

 

Here is how you can do it.
C#
Header header = grid.Headers[0];
Column column1 = header["Column1"];
Column column2 = header["Column2"];

//Sort by the first column
column1.SortDirection = SortDirection.Ascending;

//Turn on the multiple sort by the second column
column2.SortDirection = SortDirection.Descending;

//Enumerate all sorted columns
foreach (Column column in header.SortedColumns)
{
//Some code here...
}

//Clear the sort
header.SortedColumns.Clear();