Hi,

Recently I started using the AJAX control toolkit Tabs. 

I do a postback when the tab is clicked, the problem is it shows the panel first and then refresh the screen later.  It looks like that the screen is refreshed twice.

Initially my panel will be without the data and when the postback happens then it would get the information into the panel.  

Is there anyway to avoid showing the panel until the postback happens?

Thanks in advance. 

HI, if u r binding the tabs in page load then try to bind in if(!ispostback)

Thanks 

<form id="form1" runat="server">
      
<asp:ScriptManager ID="ScriptManager1"  EnableScriptGlobalization="true"  EnableScriptLocalization="true" runat="server" EnablePageMethods="true"></asp:ScriptManager>
        <Header:MainMenu ID="mainmenu" runat="server" />
        <br />
        <p class="addEditHeader">
            <%=Page.Title %>
        </p>
        <ajaxToolkit:TabContainer runat="server" ID="Tabs" Height="400px"  ScrollBars="Auto"  Width="100%" AutoPostBack="True"  OnActiveTabChanged="SetDLId"  ActiveTabIndex="0" >
           <ajaxToolkit:TabPanel runat="server" ID="Panel2" HeaderText="Distribution List Item Entry">
                <ContentTemplate>
                    <asp:UpdatePanel ID="updatePanel1" runat="server">
                        <ContentTemplate>
                            <DL:Entry ID="DLEntry" runat="server"  />
                           
                        </ContentTemplate>
                    </asp:UpdatePanel>
                    
                </ContentTemplate>
            </ajaxToolkit:TabPanel>
            <ajaxToolkit:TabPanel runat="server" ID="Panel3" HeaderText="Distribution List View"   Width="98%" >
                <ContentTemplate>
                     <DLReport:DLRep ID="Rep" runat="server" />
                </ContentTemplate>
            </ajaxToolkit:TabPanel>
        </ajaxToolkit:TabContainer>
    </form>     

Hi Sonasonia,

Switch from tabs is fired by javascript, it is occurred before postback, so if you page is complex, your phenomenon is obvious.  But it won't cause double postback.  We suggest that you'd better use a debugging tool such as Fiddler, Web Development Helper to detect which control caused the double postback, and do some modifications.

Best regards,

Jonathan