how to sort single row from datatable in descending order ?

hi,

try following code

DataTable dt = new DataTable();
dt.Columns.Add("mydata");
dt.Rows.Add("40,45,10,15");
foreach (DataRow drow in dt.Rows)
{
    drow[0] = string.Join(",", Convert.ToString(drow[0]).Split(new char[] { ',' }).OrderByDescending(f1=>Convert.ToInt32(f1)));
    drow.EndEdit();
    dt.AcceptChanges();
}

hope this will help you.