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POTelerik RadAjaxManager loads controls slow the first time
 

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    <p>So I have a RadPanelBar, and within that a RadTreeView. On a node click event I want so update some control.. for now I am just trying to update a textbox. It works fine except that the first time I click on a child node it takes a very long time to update the control.. Just a simple text change. I set a break point in my function and I noticed that it is taking long to fire the OnNodeClick event.. If I click a parent node in the tree view it loads fine on the first click. Also, after the first time I've clicked it.. it loads quickly.. If I refresh the page, it is slow on the first click again.. Is there something I am missing.. Is the structure of my HTML inappropriate for these AJAX calls? I feel like this is a really simple example that should work..</p> <pre><code>&lt;asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"&gt; &lt;telerik:RadAjaxManagerProxy ID="RadAjaxManagerProxy1" runat="server"&gt; &lt;AjaxSettings&gt; &lt;telerik:AjaxSetting AjaxControlID="IncidentReportPanel"&gt; &lt;UpdatedControls&gt; &lt;telerik:AjaxUpdatedControl ControlID="IRViewPanel" LoadingPanelID="LoadingPanel1" /&gt; &lt;/UpdatedControls&gt; &lt;/telerik:AjaxSetting&gt; &lt;/AjaxSettings&gt; &lt;/telerik:RadAjaxManagerProxy&gt; &lt;telerik:RadAjaxLoadingPanel ID="LoadingPanel1" runat="server" Style="width: 320px; padding-top: 125px;" Skin="Vista"&gt; &lt;/telerik:RadAjaxLoadingPanel&gt; &lt;table width="100%"&gt; &lt;tr style="height: 25px"&gt; &lt;td&gt; &lt;/td&gt; &lt;td&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr style="height: 100%"&gt; &lt;td style="width: 250px"&gt; &lt;telerik:RadPanelBar ID="IncidentReportPanel" runat="server" Height="450px" CssClass="IRPanel"&gt; &lt;Items&gt; &lt;telerik:RadPanelItem runat="server" Text="Incident Reports" ImageUrl="./Images/folder.gif" Value="IncidentReports"&gt; &lt;Items&gt; &lt;telerik:RadPanelItem&gt; &lt;ItemTemplate&gt; &lt;telerik:RadTreeView ID="IncidentReportsTreeView" runat="server" OnNodeExpand="LoadTreeNodes" OnNodeClick="PopulateIRData"&gt; &lt;Nodes&gt; &lt;telerik:RadTreeNode Text="Pending" ExpandMode="ServerSideCallBack" ImageUrl="./Images/completed.gif"&gt; &lt;/telerik:RadTreeNode&gt; &lt;telerik:RadTreeNode Text="Completed" ExpandMode="ServerSideCallBack" ImageUrl="./Images/completed.gif"&gt; &lt;/telerik:RadTreeNode&gt; &lt;/Nodes&gt; &lt;/telerik:RadTreeView&gt; &lt;/ItemTemplate&gt; &lt;/telerik:RadPanelItem&gt; &lt;/Items&gt; &lt;/telerik:RadPanelItem&gt; &lt;telerik:RadPanelItem runat="server" Text="Calendar" ImageUrl="./Images/calendar.gif" Value="Calendar"&gt; &lt;Items&gt; &lt;telerik:RadPanelItem&gt; &lt;ItemTemplate&gt; &lt;telerik:RadCalendar runat="server" ID="IRCalendar" Width="100%" /&gt; &lt;/ItemTemplate&gt; &lt;/telerik:RadPanelItem&gt; &lt;/Items&gt; &lt;/telerik:RadPanelItem&gt; &lt;/Items&gt; &lt;/telerik:RadPanelBar&gt; &lt;/td&gt; &lt;td&gt; &lt;asp:Panel ID="IRViewPanel" runat="server"&gt; &lt;telerik:RadTextBox ID="RadText" runat="server"&gt; &lt;/telerik:RadTextBox&gt; &lt;/asp:Panel&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </code></pre> <p></p> <pre><code> protected void PopulateIRData(object sender, RadTreeNodeEventArgs e) { RadText.Text = "Hello, World!"; } </code></pre> <p>EDIT: I updated my code according to this article, <a href="http://www.telerik.com/help/aspnet-ajax/ajax-client-side-performance.html" rel="nofollow">http://www.telerik.com/help/aspnet-ajax/ajax-client-side-performance.html</a> , and the problem persisted... again it only happens the first time..</p> <p>EDIT: Just to clarify, by updating according to that article, I mean that I removed all the tables and relative widths and replaced them with css positioning and fixed widths.. the problem only happens the first time.. and it only happens sometimes.. quite a few times i thought i solved the problem as it would start responding quickly.. but then after I change my .aspx and change it back (even to the exact same thing when it was working quickly).. I get the same problem.. </p> <p>EDIT: So, I removed the AJAX component.. and setup the control so that it does a PostBack.. and it still takes long to hit my break point.. so it seems that its not an AJAX issue... but for some reason my events are taking long to fire..</p> <p>EDIT: So I followed the advice on this post and I used the webservices to do my binding and handle everything from the client side code.. All seemed to be ok until I decided that I wanted to return nodes from my webservice that could also be expanded.. So in my webservice I set the ExpandMode of my RadTreeNodeData object to Webservice.. and it renders the data correctly when I expand the child nodes.. However now I see the same problem from before where some calls take 20-30 seconds.. It takes 20-30 seconds to even hit the break point in my webservice.. Should I use the OnClientNodeExpand event instead? I don't understand why this is so slow!! Any help is greatly appreciated!</p>
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    1. COis it fast all of the other times, and by fast I mean of an acceptable speed.
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    2. COIt's slow only the first time it load. All other times it is a very acceptable speed. If I refresh the page, it is slow the first time again.. then fast all other times after.
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    3. COI really need to get this working.. opening up my first bounty.. hoping for some good suggestions! :)
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