ASP.NET GridView Paging and Sorting

Below is the sample to include Sorting and Paging in ASP.Net GridView.

ASPX Code

<asp:GridView ID="grd" runat="server" AutoGenerateColumns="False" 
                AllowSorting="true" OnSorting="grd_Sorting" 
                AllowPaging="true" PageSize="50" OnPageIndexChanging="grd_PageIndexChanging">

Code Behind

protected void grd_Sorting(object sender, GridViewSortEventArgs e)
        {
            try
            {
                mDT = GetData();
                
                SetSortDirection(SortDirection);
                if (mDT != null)
                {                    
                    mDT.DefaultView.Sort = e.SortExpression + " " + _sortDirection;
                    grd.DataSource = mDT;
                    grd.DataBind();
                    SortDirection = _sortDirection;
                }
            }
            catch(Exception exp)
            {
            }
        }

protected void grd_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            grdList.PageIndex = e.NewPageIndex;

            try
            {
                mDT = GetData();
                
                SetSortDirection(SortDirection);
                if (mDT != null)
                {
                    
                    grd.DataSource = mDT;
                    grd.DataBind();
                    SortDirection = _sortDirection;
                }
                
            }
            catch (Exception exp)
            {
            }
        }

GridView Sort not working when AutoGenerateColumns = False
Need to set SortExpression to the columns manually (SortExpression=”datafield” ), when AutoGenerateColumns=”false”. If AutoGenerateColumns=”True”, then DataGrid sets SortExpression automatically based on the field name.

<asp:BoundField DataField="datacolumn" SortExpression="datacolumn" HeaderText="Data Header">