Question

I have developed an asp.net application that has a Gridview control. I want it to sort when I click on the Gridview header text in asp.net. Entity framework is used to bind the gridview.

protected void grdmortgagesaver_Sorting(object sender, GridViewSortEventArgs e)
{
    string sortExpression = e.SortExpression;

    if (GridViewSortDirection == SortDirection.Ascending)
    {
        GridViewSortDirection = SortDirection.Descending;
        SortGridView(sortExpression, DESCENDING);
    }
    else
    {
        GridViewSortDirection = SortDirection.Ascending;
        SortGridView(sortExpression, ASCENDING);
    }   

}

private void SortGridView(string sortExpression, string direction)
{

 //  You can cache the DataTable for improving performance
     var databind = from i in mortgageentites.Clients orderby i.LastName select i;
    if (databind.Count() > 0)
    {    
        grdmortgagesaver.DataSource = databind.ToList();
        grdmortgagesaver.DataBind();
        DataTable dt = clients;
        if (dt != null)
        {
            // DataTable dt = ds.Tables[0];
            DataView dv = new DataView(dt);
            dv.Sort = sortExpression + direction;
            grdmortgagesaver.DataSource = dv;
            grdmortgagesaver.DataBind();
        }
    }
}

Answer 1

If you are using a standard ASP.NET System.Web.UI.WebControls.GridView, you can simply “Enable Sorting”, in the properties pane by setting “AllowSorting” to true or via the “pop-out” on the top right of the control by checking “Enable Sorting”