Hello,

theres a part of code in my webpage:


.aspx code


            runat="server"
            ID="ResGrid"
            AllowPaging="True"
            onPageIndexChanged="setPage"
            PageSize="15" >


            runat="server"
            ID="Panel1"
            GroupingText="Preferences" >       
           
                Number of results per page:
               
                    10
                    15
                    20
                    25
                    30
               
           

           

       


.aspx.cs code

protected void submitPre_Click(object sender, EventArgs e)
    {
        ResGrid.PageSize = Convert.ToInt32(selectNumResPerPage.SelectedValue);
    }

The problem with this program is that I have to click the submitPre button twice in order to change the PageSize value. While I run my program, I change the selected value of the dropdownlist, I click on the "save changes" button, the page reloads, but there's no change. When I click on the button again and the page reloads for second time, then theres a the change I want to do. Why is that happening;

Can anyone help me please?