How to do Asp.net Ajax with Sharepoint 2010 -“The control with ID 'thePanel' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it”

I am trying to implement ajax functionality in SP 2010 Visual web part through Updatepanel/ScriptMgr from Asp.net Ajax lib.

When I try to add the UpdatePanel through code or server tags it throws me the following error:

“The control with ID 'thePanel' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it”  

When I add the script manager through code or server tags, I ran into the following issues.

Please let me know if I miss something.

Neither of the snippets are working…

   protected override void CreateChildControls()

        {

            base.CreateChildControls();

            var panel = new UpdatePanel { ID = "thePanel" };

            //Important: UpdateMode MUST be Conditional in a webpart to prevent conflicts with the ribbon.

            panel.UpdateMode = UpdatePanelUpdateMode.Conditional;

            var button = new Button { ID = "theButton", Text = "Click Me" };

            button.Click += ButtonClick;

            TheLabel = new Label { ID = "theLabel" };

            Control template = panel.ContentTemplateContainer;

            template.Controls.Add(button);

            template.Controls.Add(TheLabel);

            Controls.Add(panel);

        }

( Or )

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

<ContentTemplate>

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

<asp:Button ID="btnsubmit" Text="Submit" OnClick="btnClick_Handler" runat="server"/>

</ContentTemplate>

</asp:UpdatePanel>

REPLY :1

.ascx

<asp:PlaceHolder ID="sMgr_place" runat="server" />

<asp:UpdatePanel runat="server" OnInit="updatePanel_Init">

<ContentTemplate> ... </ContentTemplate></asp:UpdatePanel>

.ascx.cs

public void updatePanel_Init(object sender, EventArgs e)

{   

 if (ScriptManager.GetCurrent(Page) == null)  

  {       

 ScriptManager sMgr = new ScriptManager();        

 sMgr.EnablePartialRendering = true;        

 sMgr_place.Controls.Add(sMgr);   

 }

} 

Check this

http://stackoverflow.com/questions/183950/add-scriptmanager-to-page-programmatically

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