RadAjax for ASP.NET AJAX
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RadControls for ASP.NET AJAX

RadAjax for ASP.NET AJAX Manager allows a single instance of the control on the same page only. One cannot place manager in the main page and second instance inside a user control anymore. RadAjaxManager designer on the other hand, cannot locate the WebUserControl (as well as controls inside it).

Since the release of RadAjax for ASP.NET AJAX from May 2007, there is a new, RadAjaxManagerProxy control. The new control can be added inside a WebUserControl and configured the same way as the manager to AJAX-enable the user control completely codeless:

CopyASCX
<telerik:RadAjaxManagerProxy ID="AjaxManagerProxy1" runat="server">
    <AjaxSettings>
        <telerik:AjaxSetting AjaxControlID="DropDownList1">
            <UpdatedControls>
                <telerik:AjaxUpdatedControl ControlID="DetailsView1" />
                <telerik:AjaxUpdatedControl ControlID="GridView1" />
            </UpdatedControls>
        </telerik:AjaxSetting>
        <telerik:AjaxSetting AjaxControlID="GridView1">
            <UpdatedControls>
                <telerik:AjaxUpdatedControl ControlID="GridView1" />
                <telerik:AjaxUpdatedControl ControlID="DetailsView1" />
            </UpdatedControls>
        </telerik:AjaxSetting>
    </AjaxSettings>
</telerik:RadAjaxManagerProxy>
Note

RadAjaxManagerProxy can be used for design-time configuration only. It does not have a client-side object, methods or events!

Note

If one still needs the manager instance at the code of a WebUserControl for example so that an AJAX request need to be triggered explicitly, she can get the manager by RadAjaxManager.GetCurrent() method call. The method will return null if there is no manager on the page, similar to ASP:ScriptManager implementation.

Should you need the server or client-side RadAjaxManager functionality (like ResponseScripts collection, ajaxRequest function) you can get the "master" manager instance via Server-Side GetCurrent method from the user control code-behind:

CopyRadAjaxManager GetCurrent method
RadAjaxManager.GetCurrent(Page);

Use server-side code block in a JS function inside your WebUserControl to call the master manager ajaxRequest function:

CopyAccessing RadAjaxManager from WebUserControl's JavaScript
<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
    <script type="text/javascript">
        function myUserControlClickHandler() {
            $find("<%= RadAjaxManager.GetCurrent(Page).ClientID %>").ajaxRequest("content");
        }
    </script>
</telerik:RadCodeBlock>

As to the AJAX settings, the old RadAjax approach, adding AJAX settings programmatically, is still applicable. Here is a simple example demonstrating how this could be achieved:

ASPX:

CopyMain page
<form id="Form1" method="post" runat="server">
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
</telerik:RadScriptManager>
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
</telerik:RadAjaxManager>
<uc1:webusercontrol1 id="WebUserControl1" runat="server"></uc1:webusercontrol1>
</form>
CopyUser Control
<asp:Button ID="Button1" Text="Button" runat="server"></asp:Button>
<asp:Label ID="Label1" runat="server">Label</asp:Label>

And in the code-behind:

See Also