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Properties

The AjaxManager exposes a set of server-side properties.

The following list shows some of the most frequently used ones. For the full list, refer to the Server-Side API of the RadAjaxManager class.

  • EnableAJAX—When you set the EnableAJAX property to true (the default), all requests (controls either within the RadAjaxPanel Template or managed by the RadAjaxManager) are handled with AJAX. If this property is false, requests are handled in the legacy postback manner.

  • EnableHistory—When you set the EnableHistory property to true (the default is false), the browser history is enabled, even when using AJAX. The Forward and Back buttons of the browser work as expected (IE browser only). For more information, refer to the article on the Back and Forward browser buttons.

  • EnablePageHeadUpdate—When you set the EnablePageHeadUpdate property to true (the default), the Page <head> element can be modified during AJAX updates. You'll find this functionality especially useful when you initiate controls as invisible or when loading the control dynamically on an AJAX request.

  • IsAjaxRequest—Set this property to true when the current request is through AJAX, and to false when the request is a standard postback. In the following example, Button1 has been configured to be AJAX-enabled and the alert will display true. Clicking Button2 will display false.

    The following example demonstrates how to set the IsAjaxRequest.

        <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
    </telerik:RadScriptManager>
    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
            <AjaxSettings>
                <telerik:AjaxSetting AjaxControlID="Button1">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="Label1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
            </AjaxSettings>
    </telerik:RadAjaxManager>
    <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
    <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
    <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="Button" />    
    ````
    
        protected void Button1_Click(object sender, EventArgs e)
    {
        RadAjaxManager1.Alert(RadAjaxManager1.IsAjaxRequest.ToString());
    }
    
    protected void Button2_Click(object sender, EventArgs e)
    {
        RadAjaxManager1.Alert(RadAjaxManager1.IsAjaxRequest.ToString());
    }               
    ````
    
        Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
        RadAjaxManager1.Alert(RadAjaxManager1.IsAjaxRequest.ToString())
    End Sub
    
    Protected Sub Button2_Click(ByVal sender As Object, ByVal e As EventArgs)
        RadAjaxManager1.Alert(RadAjaxManager1.IsAjaxRequest.ToString())
    End Sub
    ````
    
    • DefaultLoadingPanelID—Allows you to specify a default LoadingPanel that will be shown when updating AJAX-enabled controls.

    • UpdatePanelsRenderMode—Determines the way of rendering the AJAX panels. When you chose the Block option, the panels will be rendered as div elements. If you chose the Inline option, the panels will be rendered as span elements.

    • UpdateInitiatorPanelsOnly—By setting this property to true (its default value is false), only the containers added as UpdatedControls for a specific initiator will be conditionally updated. For more information, refer to the article on updating the UpdatePanels of the initiator only.

    • ResponseScripts—This collection of strings contains JavaScript for you to execute when the response returns to the browser. In the following example, an alert() JavaScript function is added to the collection. Also, see below for the rendered HTML results showing the call to alert() near the end of the HTML.

        protected void Button2_Click(object sender, EventArgs e)
    {
        RadAjaxManager1.ResponseScripts.Add("alert('this fires after the response');");
    }           
    ````
    
        Protected Sub Button2_Click(ByVal sender As Object, ByVal e As EventArgs)
        RadAjaxManager1.ResponseScripts.Add("alert('this fires after the response');")
    End Sub             
    ````
    

    The following example contains some sample code showing the usage of the ResponseScripts property.

        <script type="text/javascript">
        setTimeout(function () { alert('this fires after the response'); }, 0); 
        Sys.Application.initialize();   
        Sys.Application.add_init(function () {
        $create(Telerik.Web.UI.RadAjaxManager, { "ajaxSettings": [{ InitControlID: "Button1", UpdatedControls: [{ ControlID: "Label1", PanelID: ""}]}], "clientEvents": { OnRequestStart: "", OnResponseEnd: "" }, "defaultLoadingPanelID": "", "enableAJAX": true, "enableHistory": false, "links": [], "styles": [], "uniqueID": "RadAjaxManager1" }, null, null, $get("RadAjaxManager1"));
    });
    </script>
    ````
    

See Also

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