Exclude Toolbar button from Ajax Update

5 posts, 0 answers
  1. Albert Shenker
    Albert Shenker avatar
    550 posts
    Member since:
    Mar 2004

    Posted 31 Aug 2009 Link to this post

    I have a toolbar in a user control which is ajaxified using the following declaration:

    <telerik:RadAjaxManagerProxy ID="rap1" runat="server" > 
            <telerik:AjaxSetting AjaxControlID="rtbActions">  
                    <telerik:AjaxUpdatedControl ControlID="pnlFFV" LoadingPanelID="lpFFV" /> 
                    <telerik:AjaxUpdatedControl ControlID="rtbActions" /> 

    When certain toolbar buttons are clicked, controls are updated within a panel control (pnlFFV), and sometimes the toolbar itself is updated. This all works well, however, there is a button in the toolbar, which I want to cause a postback instead of an ajax update (this button is used to download a file and it is necessay to use the reponse object). I tried the following:

    I added this script:

    function realPostBack_FFV(eventTarget, eventArgument) {  
         $find("<%= rap1.ClientID %>").__doPostBack(eventTarget, eventArgument);  

    and in codebehind, I tried to wire it up to the particular toolbar button

    For Each itm As RadToolBarButton In rtbActions.Items  
         If itm.Value = "Download" Then 
              itm.Attributes.Add("onclick"String.Format("realPostBack_FFV('{0}', ''); return false;", itm.UniqueID))  
         End If 

    However, this button still causes an ajax update. can someone help me figure out how to exclude a particular toolbar button from an ajaxupdate if the rest of the toolbar is ajaxified?

    P.S., I also tried modifying the javascript to reference the AjaxManager instead of the Proxy, like so:

    function realPostBack_FFV(eventTarget, eventArgument) {     
         $find("<%= Me.MyAjaxManager.ClientID %>").__doPostBack(eventTarget, eventArgument);     
     //Me.MyAjaxManager gets a reference to the shared AjaxManager in my base page class

    But this dind't seem to make a difference.

  2. Atanas Korchev
    Atanas Korchev avatar
    8462 posts

    Posted 02 Sep 2009 Link to this post

    Hi Albert Shenker,

    Unfortunately it is not that simple. Calling __doPostBack manually will not prevent ajax as the DOM element which triggers the click is within update panel (that's how ASP.NET Ajax determines whether to postback or make ajax).

    I suggest the following solution instead:

        <telerik:RadCodeBlock runat="server" ID="RadCodeBlock1">
            <script type="text/javascript">
                function onRequestStart(sender, args) {
                    var eventTarget = args.get_eventTarget(); //the UniqueID of the control which triggers the ajax
                    var toolBar = $find("<%= RadToolBar1.ClientID %>");
                    if (eventTarget.replace(/\$/ig,"_") == toolBar.get_id()) { //check if this is the toolbar
                        var index = parseInt(args.get_eventArgument()); //the index of the button which was clicked
                        var button = toolBar.get_items().getItem(index);
                        if (button.get_text() == "Postback") { // cancel the ajax
        <telerik:RadAjaxManager runat="server" ClientEvents-OnRequestStart="onRequestStart">
                <telerik:AjaxSetting AjaxControlID="RadToolBar1">
                        <telerik:AjaxUpdatedControl ControlID="RadToolBar1" />
        <telerik:RadToolBar runat="server" ID="RadToolBar1" AutoPostBack="true">
                <telerik:RadToolBarButton Text="Ajax"></telerik:RadToolBarButton>
                <telerik:RadToolBarButton Text="Postback"></telerik:RadToolBarButton>

    Atanas Korchev
    the Telerik team

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  4. Warren
    Warren avatar
    17 posts
    Member since:
    May 2008

    Posted 07 Apr 2010 Link to this post

    Will this work if the toolbar is in a user control and you are using the RadajaxManagerProxy?

  5. Yana
    Yana avatar
    4547 posts

    Posted 08 Apr 2010 Link to this post

    Hello Warren,

    RadAjaxManagerProxy doesn't provide the client-side events as RadAjaxManager,  here it's demonstrated how to attach the events to the manager from the user control.

    All the best,
    the Telerik team

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  6. Rich Coleman
    Rich Coleman avatar
    19 posts
    Member since:
    Jan 2008

    Posted 23 Sep 2010 Link to this post

    This post saved my life!!!
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