Combo on masterpage

[Mattia]

Hi,
I have a combo and a menu on my masterpage. On combo selectedindexchanged I populate the menu.
Each menu open a content page.
When I click on a menu I lost the combo selection.

<telerik:RadScriptManager ID="RadScriptManager1" runat="server"></telerik:RadScriptManager>
     <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
         <AjaxSettings>
             <telerik:AjaxSetting AjaxControlID="ChooseProjectDdl">
                 <UpdatedControls>
                     <telerik:AjaxUpdatedControl ControlID="ChooseProjectDdl" />
                     <telerik:AjaxUpdatedControl ControlID="RadMenu1"  />
                     <telerik:AjaxUpdatedControl ControlID="BreadCrumbSiteMap"  />
                 </UpdatedControls>
             </telerik:AjaxSetting>

             <telerik:AjaxSetting AjaxControlID="RadMenu1">
                 <UpdatedControls>
                     <telerik:AjaxUpdatedControl ControlID="RadMenu1"  />
                     <telerik:AjaxUpdatedControl ControlID="ChooseProjectDdl" />
                     <telerik:AjaxUpdatedControl ControlID="BreadCrumbSiteMap"  />
                     <telerik:AjaxUpdatedControl ControlID="ContentPlaceHolder1"  />
                 </UpdatedControls>
             </telerik:AjaxSetting>
         </AjaxSettings>

     </telerik:RadAjaxManager>
     <telerik:RadAjaxLoadingPanel ID="RadAjaxMainLoadingPanel" runat="server" Skin="Default" />


     <div>

         <header>
             <div class="projectChooser">
                 <telerik:RadComboBox ID="ChooseProjectDdl" runat="server" Width="250" Height="150" on
                     EmptyMessage="Select a Project" EnableLoadOnDemand="true"
                     OnSelectedIndexChanged="ChooseProjectDdl_SelectedIndexChanged" AutoPostBack="true"
                     Label="Project:">
                     <WebServiceSettings Method="GetUserProjects" Path="ProjectsWebService.asmx" />
                 </telerik:RadComboBox>
             </div>
         </header>


             <div class="demo-container size-medium no-bg">
                 <div class="demo-content">
                     <telerik:RadMenu ID="RadMenu1"
                         runat="server"
                         EnableRoundedCorners="true"
                         EnableShadows="true"
                         EnableTextHTMLEncoding="true"
                         Skin="Default">
                     </telerik:RadMenu>
                     <br />
                     <div class="breadcrumb">
                         <telerik:RadSiteMap ID="BreadCrumbSiteMap" runat="server" DataTextField="Text" DataNavigateUrlField="NavigateUrl" Skin="Silk">
                             <DefaultLevelSettings ListLayout-RepeatDirection="Horizontal" SeparatorText="/" Layout="Flow" />
                         </telerik:RadSiteMap>
                         <h3>
                             <asp:Literal runat="server" ID="PageTitleLiteral" />
                         </h3>
                     </div>
                 </div>
             </div>


             <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
             </asp:ContentPlaceHolder>

     </div>

I tried to save the value on a session and force the selectedvalue on the MasterPage on Load event but it doesn't work

if (!Page.IsPostBack)
            {
                if (Session["ActiveProject"] != null && GlobalClientInfo.LoggedUser != null)
                {
                    ProjectEntity pjt = (ProjectEntity)Session["ActiveProject"];
                    m_ProjectId = pjt.Id;
                    ChooseProjectDdl.SelectedValue = m_ProjectId.ToString();
                }
            }

What do I miss?

[Ivan Danchev]

Hello,

The problem that I noticed in your code is that you are trying to access the RadComboBox selection in the Session object only when the page is loaded for the first time (!Page.IsPostBack).
Based on the provided information I assume that you store the RadComboBox SelectedValue to the Session object when  the RadComboBox OnSelectedIndexChanged event fires. 

When the page is initially loaded the Session["ActiveProject"]  is null, as there is no selected item yet. To access the selected value from the Session on each post-back you can simply use the following syntax:
//code behind

if (Page.IsPostBack)
            {
                if (Session["ActiveProject"] != null && GlobalClientInfo.LoggedUser != null)
                {
                    ProjectEntity pjt = (ProjectEntity)Session["ActiveProject"];
                    m_ProjectId = pjt.Id;
                    ChooseProjectDdl.SelectedValue = m_ProjectId.ToString();
                }
            }

Regards,
Ivan Danchev
Telerik