UserControl disapears after the second postback (ajax request)

5 posts, 0 answers
  1. Stephane
    Stephane avatar
    27 posts
    Member since:
    Mar 2009

    Posted 02 Aug 2011 Link to this post

    Hi,
    I build an aspx page which contains only one RadTabStrip and its RadMultiPage.

    In the page_load event (in the behind code), I build dynamically the RadTabStrip and the RadMultiPage
    protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                string[] arguments = Session[SessionParameterName.LISTDOCTOVISU] as string[];
                for (int i = 0; i < arguments.Length; i++)
                {
                    AddTab(arguments[i]);
                    AddPageView(RadTabStripDocView.Tabs[i]);
                }
            }      
        }

    For each value the named Session field, i create a RadTab and a PageView, like in the live demo example.
    I also implemented the function AddTab and AddPageView
    private void AddTab(string codeDoc)
        {
            RadTab tab = new RadTab();
            tab.Text = codeDoc;
            tab.Attributes.Add("CodeDoc", codeDoc);
            tab.Value = codeDoc;
            RadTabStripDocView.Tabs.Add(tab);
        }
     
        private void AddPageView(RadTab tab)
        {
            RadPageView pageView = new RadPageView();
            pageView.ID = "PageView_ID_" + tab.Value;
            pageView.Attributes.Add("CodeDoc", tab.Value);
            RadMultiPageDocView.PageViews.Add(pageView);
            tab.PageViewID = pageView.ID;
        }

    and the event PageViewCreate on the RadMultiPage
    protected void RadMultiPage1_PageViewCreated(object sender, RadMultiPageEventArgs e)
        {
            string codeDoc = e.PageView.Attributes["CodeDoc"];
            if (!string.IsNullOrEmpty(codeDoc))
            {
                string userControlName = "usercontrol/ViewerDocument.ascx";
                ViewerDocument userControl = Page.LoadControl(userControlName) as ViewerDocument;
                userControl.ID = e.PageView.ID + "_ViewerDocument";
                userControl.CodeDoc = e.PageView.Attributes["CodeDoc"];
                e.PageView.Controls.Add(userControl);
            }
        }


    My user control content:
    <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="ViewerDocument.ascx.cs"
        Inherits="Class_iWebAsp.usercontrol.ViewerDocument" %>
    <telerik:RadCodeBlock runat="server" ID="PreviewDocumentForMultiDocCodeBlock">
        <script type="text/javascript">       
        </script>
    </telerik:RadCodeBlock>
    <telerik:RadAjaxManagerProxy ID="RadAjaxManagerProxy1" runat="server">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="RadToolBarPaging">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadSplitter1" LoadingPanelID="RadAjaxLoadingPanel1"  />
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManagerProxy>
    <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" Skin="Default">
    </telerik:RadAjaxLoadingPanel>
    <telerik:RadSplitter ID="RadSplitter1" runat="server" Width="100%" Height="100%"
        Orientation="Horizontal">
        <telerik:RadPane ID="RadPaneToolBarPaging" runat="server" Scrolling="None" Height="35px"
            Width="100%">
            <telerik:RadToolBar ID="RadToolBarPaging" runat="server" AutoPostBack="true" OnButtonClick="RadToolBarPaging_buttonClick"
                Width="100%">
                <Items>
                    <telerik:RadToolBarButton ImageUrl="../images_toolbar/arrow_first.gif" Value="first">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton ImageUrl="../images_toolbar/arrow_prev.gif" Value="prev">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton IsSeparator="true">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton PostBack="false" Value="info">
                        <ItemTemplate>
                            <asp:Label ID="LabelInfo" runat="server" Text="Page 1/1"></asp:Label>
                        </ItemTemplate>
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton IsSeparator="true">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton ImageUrl="../images_toolbar/arrow_next.gif" Value="next">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton ImageUrl="../images_toolbar/arrow_last.gif" Value="last">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton IsSeparator="true" />
                    <telerik:RadToolBarButton ImageUrl="../images_toolbar/zoom_arriere_16x.png" Value="zoommois"
                        PostBack="false">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton ImageUrl="../images_toolbar/zoom_avant_16x.png" Value="zoomplus"
                        PostBack="false">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton IsSeparator="true">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton ImageUrl="../Icons/pdf.jpg" Value="saveas" Target="_blank"
                        PostBack="false" ToolTip="Télécharger(version PDF)">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton ImageUrl="../Images/saveas.gif" Value="saveasOri" Target="_blank"
                        PostBack="false" ToolTip="Télécharger(vesion original)">
                    </telerik:RadToolBarButton>
                    <telerik:RadToolBarButton ImageUrl="../Images/print.gif" Value="print" PostBack="false"
                        Visible="false" ToolTip="Imprimer">
                    </telerik:RadToolBarButton>
                </Items>
            </telerik:RadToolBar>
        </telerik:RadPane>
        <telerik:RadPane ID="RadPanePreviewDoc" runat="server">
            qsfhklqjfqklsfqklfjqlfjqlkf
        </telerik:RadPane>
    </telerik:RadSplitter>
    <asp:HiddenField ID="HiddenFieldPageNumber" runat="server" Value="1" />
    <asp:HiddenField ID="HiddenFieldPageTotal" runat="server" Value="1" />

    So When I click on the RadToolBarButton the ajax Postback is well fired, the second times is a not an ajax postback it's a simple postback, the RadAjaxManager is not on ajaxrequest, and my usercontrols disappear.

    Could you help me?
  2. Pavlina
    Admin
    Pavlina avatar
    6084 posts

    Posted 05 Aug 2011 Link to this post

    Hello Stephane,

    Please revise the following help topic and online example which elaborate on Loading UserControls with Ajax. I hope this information will be useful for you.

    All the best,
    Pavlina
    the Telerik team

    Browse the vast support resources we have to jump start your development with RadControls for ASP.NET AJAX. See how to integrate our AJAX controls seamlessly in SharePoint 2007/2010 visiting our common SharePoint portal.

  3. UI for ASP.NET Ajax is Ready for VS 2017
  4. Stephane
    Stephane avatar
    27 posts
    Member since:
    Mar 2009

    Posted 05 Aug 2011 Link to this post

    Ok I will try your issue.
    Thanks.

    Best regards,
    Stéphane.
  5. Bruno
    Bruno avatar
    10 posts
    Member since:
    Aug 2011

    Posted 08 Aug 2011 Link to this post

    Hi Stephane, 

    I am dealing with the same issue. Any luck on the links?

    Regards, Tks
    Bruno
  6. Pavlina
    Admin
    Pavlina avatar
    6084 posts

    Posted 08 Aug 2011 Link to this post

    Hello Bruno,

    Could you please open a formal support ticket and send us a sample project, illustrating the issue you are facing? We will debug it locally and turn back to you with a solution.

    Best wishes,
    Pavlina
    the Telerik team

    Browse the vast support resources we have to jump start your development with RadControls for ASP.NET AJAX. See how to integrate our AJAX controls seamlessly in SharePoint 2007/2010 visiting our common SharePoint portal.

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