Sort gridview without viewstate [source code]

Introduction 

Many developers who try to sort a GridView generally use the ViewState for maintaining the last position of the GridView. Here, I want to show you a new technique of doing this...

Here is my GridView code:

<asp:GridView ID="GridView1" runat="server" AllowSorting="true" 
        AutoGenerateColumns="False" onsorting="GridView1_Sorting" 
        CurrentSortField="employeeid" CurrentSortDirection="ASC" 
        onrowcreated="GridView1_RowCreated" AllowPaging="true" 
        CaptionAlign="Bottom" onpageindexchanging="GridView1_PageIndexChanging" 
        onprerender="GridView1_PreRender" 
         PageSize="2">
      <Columns>
        <asp:BoundField  DataField="EmployeeId" HeaderText="Last Name"  
              ItemStyle-Width="15%" SortExpression="EmployeeId" >
        <ItemStyle Width="15%"></ItemStyle>
          </asp:BoundField>
        <asp:BoundField DataField="Name" HeaderText="First Name"  ItemStyle-Width="15%" 
              SortExpression="Name"  >
             <ItemStyle Width="15%"></ItemStyle>
          </asp:BoundField>
        <asp:BoundField DataField="gender" HeaderText="Email" ItemStyle-Width="15%" >
            <ItemStyle Width="15%"></ItemStyle>
          </asp:BoundField>
        <asp:TemplateField HeaderText="Change Password"  ItemStyle-Width="15%">

        <ItemTemplate>

            <asp:LinkButton ID="imgbtn1" runat="server">change password</asp:LinkButton>
        </ItemTemplate>

             <ItemStyle Width="15%"></ItemStyle>
          </asp:TemplateField>
        <asp:BoundField DataField="city" HeaderText="Date created"  ItemStyle-Width="15%">
             <ItemStyle Width="15%"></ItemStyle>
          </asp:BoundField>
        </Columns>
        <PagerSettings Mode="NextPreviousFirstLast" />
    </asp:GridView>

And I sort using the attribute property of the GridView.

see here through attribute i am maintaining last sorted record suppose last i sort asc then asc and if i last sorted desc then desc this is how its working >> 

private void GridView1_Sorting (GridView gridview, GridViewSortEventArgs e, 
         out SortDirection sortDirection, out string sortField)
{
    sortField = e.SortExpression;
    sortDirection = e.SortDirection;
    if (gridview.Attributes["CurrentSortField"] != null && 
         gridview.Attributes["CurrentSortDirection"] != null)
    {
        if (sortField == gridview.Attributes["CurrentSortField"])
        {
            if (gridview.Attributes["CurrentSortDirection"] == "ASC")
            {
                sortDirection = SortDirection.Descending;
            }
            else
            {
                sortDirection = SortDirection.Ascending;
            }
        }
        gridview.Attributes["CurrentSortField"] = sortField;
        gridview.Attributes["CurrentSortDirection"] = 
           (sortDirection == SortDirection.Ascending ? "ASC" : "DESC");
    }
}

Now you will get the last sorted and filed easily and it generally shows that while developing there is too much load on the page using the viewstate. 

I am sure this will definitely help you. if you still not get it see source code... If you like it rate it.