Home / Community & Support / Developer Productivity Tools Forums / ASP.NET > Docking > DropDownList is disappearing in RadAjaxPanel when asynchronous postback

• Durga

  Posted on Jun 29, 2009 (permalink)

  Hi,
  
  DropDownList is disappearing in RadAjaxPanel when asynchronous postback even happend, what should i do to overcome this issue.
  
  Thanks/Durga

• Durga

  Posted on Oct 13, 2009 (permalink)

  Hi,
  
  Please provide solution for my below requirement. I tried in so many times to dispaly the asp:DropDownList box when buttons hits in the search form but no luck. please help me out.
  
  
  Thanks in Advance
  Durga
  

• Durga

  Posted on Oct 13, 2009 (permalink)

  Hi,
  
  Please provide solution for my below requirement. I tried in so many times to dispaly the asp:DropDownList box when buttons hits in the search form but no luck. please help me out.
  
  Please find the enclosed attachment (1.jpg).
  
  This ddl's will display again after search result set generates.
  
  Thanks in Advance
  Durga
  

  Attached files

  • 1.JPG

• Mahesh Sajja

  Posted on Mar 9, 2010 (permalink)

  Hi,
  
  I am also facing the same problem.please post the solution if anybody knows.
  
  Thanks,
  Mahesh

• Jim

  Posted on Mar 12, 2010 (permalink)

  In the following code I have a DropDownList decorated by the FormDecorator and it doesn't seem to be any problems:
  
  

  <telerik:RadFormDecorator ID="FormDecorator1" runat="server" DecoratedControls="All" />

  <div>

  <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server">

  <telerik:RadDockLayout ID="RadDockLayout1" runat="server">

  <telerik:RadDockZone ID="RadDockZone1" runat="server" MinHeight="300px" Width="300px">

  <telerik:RadDock ID="RadDock1" runat="server" Width="300px" Title="RadDock-Title"

  DockMode="Docked">

  <ContentTemplate>

  <br />

  <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="OnSelectedIndexChanged">

  <asp:ListItem Text="Item1"></asp:ListItem>

  <asp:ListItem Text="Item2"></asp:ListItem>

  <asp:ListItem Text="Item3"></asp:ListItem>

  <asp:ListItem Text="Item4"></asp:ListItem>

  </asp:DropDownList>

  <br />

  <br />

  <br />

  <asp:Label ID="Label1" runat="server"></asp:Label>

  <br />

  </ContentTemplate>

  </telerik:RadDock>

  </telerik:RadDockZone>

  </telerik:RadDockLayout>

  </telerik:RadAjaxPanel>

  
  

  protected void OnSelectedIndexChanged(object sender, EventArgs e)

  {

  Label1.ForeColor = System.Drawing.Color.Red;

  Label1.Text = DateTime.Now.ToString();

  }

  
  Please check your projects for global CSS interfering with the DropDownList. In case the controls are created dynamically make sure they are recreated on every postback or they will not appear on the page.
  
  Use FireBug or IE Dev Toolbar to inspect the page after the postback to see if any HTML is rendered by the DropDownList.
  
  
  
  

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