sort columns of gridview in asp.net c#

Question

Can anyone tell the function to sort the columns of a gridview in c# asp.net.

The databound to gridview is from datacontext created using linq. I wanted to click th

Answer 1

In Half Pseudocode for SQL Query

string Query= string.Empty;
string SortExpression = string.Empty;

// HDFSort is an HiddenField !!!

protected void SortCommand_OnClick(object sender, GridViewSortEventArgs e)
{
   SortExpression = e.SortExpression; 
   Query = YourQuery + " ORDER BY "+SortExpression +" "+ HDFSort.Value ;
   HDFSort.Value = HDFSort.Value== "ASC" ? "DESC" : "ASC";
   RefreshGridView();
}

protected void RefreshGridView()
{
   GridView1.DataSource = DBObject.GetData(Query);
   GridView1.DataBind();
}