Hi Team,
I tried following steps to use RadMultiSelect dropdown in my project but getting compile time error . 
1) I have registered Telerik.Web.UI assembly in aspx page
2) Added RadScriptManager and RadSkinManager on aspx page.
3) then added following code - 
<telerik:RadMultiSelect runat="server" DataValueField="text" Filter="Contains" EnforceMinLength="false" Placeholder="Select Receiptees"
    DataTextField="text" Width="500px" ID="requiredMultiSelect">
<Items>
<telerik:MultiSelectItem Text="Steven White"></telerik:MultiSelectItem>
<telerik:MultiSelectItem Text="Nancy King"></telerik:MultiSelectItem>
</Items>
</telerik:RadMultiSelect>   
4) added this line in aspx.vb file for default selection
requiredMultiSelect.Value = {"Anne King", "Andrew Fuller"}

And getting compile time error -
Type 'Global.Telerik.Web.UI.RadMultiSelect' is not defined.

Not able to find solution for this on telerik webpage also , Can anyone please help me with this?

I am trying to disable embeddedscripts for radgrid - everything works but context menu - which scripts altogether do I need to add?

This write up (linked below) is incorrect or out of date - can someone please help.

https://docs.telerik.com/devtools/aspnet-ajax/getting-started/performance/disabling-embedded-resources#disabling-embedded-resources

Hello,

I have a problem with RadScriptManager

I have an exisiting ASP.Net Web Forms web application.

There is Default.aspx and used Main.Master master page

I did the necessary to integrate Telerik UI Web correctly.

In the master page there is <asp:ScriptManager ID="ScriptManager...

and in the Default.aspx I added <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

and <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />

and <telerik:RadWindowManager RenderMode="Lightweight"....

and <button onclick="openReqForm(); return false;">hello</button>

in code behind:

string fctOpenReqForm = "<script type=\"text/javascript\">function openWin {var oWnd = radopen(\"Request.aspx\", \"RadWindow1\"); } </script>";

Page.ClientScript.RegisterStartupScript(this.GetType(), "openReqForm", fctOpenReqForm);

When I execute I have an error message: "Only one instance of script manager can be added to the page...

I need to add a Telerik button and other telerik things to the page and use javascript methods...

Any help? thanks

Hi,

I have been throught a lot of trouble making work telerik controls with a proxy. I'm using asp.net webform on IIS with .net 4.5 and Telerik  2020.3.1021.45

I recently added a reverse proxy (ARR) to IIS to make my website work with the blue/green pattern to get a 0 downtime deployment. So I get a webfarm that redirect to the live website with the reverseproxy. Every things work great except telerik controls.

I get many javascript exception that make me think that the telerik webressource doesnt seems to get through the proxy :  

• ASP.NET Ajax client-side framework failed to load
• 'Sys' is undefined
• “Telerik.Web.UI” is undefined

I tried to change many stuff but without sucess :

• Suppress radcompression from webconfig
• modified the <httpHandlers> and <handlers> for WebResource.axd. Changed the type to Telerik.Web.UI.WebResourceSession since I use a webfarm with shared session state.
  • How to integrate RadControls for ASP.NET AJAX in a WebFarm o (telerik.com)
• Added a <location> section to the application configuration file to allow access to Telerik.Web.UI.WebResource.axd 
  • ASP.NET Ajax client-side framework failed to load in UI for ASP.NET AJAX | Telerik Forums
• added EnableScriptCombine="false"  to telerik:RadScriptManager
  • work for all simple controls (dropdownlist) but failed for datagrid and other ajax control)

• change webfarm caching in IIS to "Include query string"

  • Reverse Proxy (ARR) and ScriptResource.axd Issue in UI for ASP.NET AJAX | Telerik Forums

I don't know what to check next. Thank you for your advices/ideas...

JF

I have a master page with the following code:

        <telerik:RadScriptManager ID="RadScriptManager1" runat="server" EnablePageMethods="True" EnableCdn="True" EnablePartialRendering="True">
            <Scripts>
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" />
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js" />
            </Scripts>
        </telerik:RadScriptManager>

My SignalR Javascript code:

    <!--Script references. -->
    <!--Reference the jQuery library. -->
    <script src="Scripts/jquery-3.6.0.min.js"></script>
    <!--Reference the SignalR library. -->
    <script src="Scripts/jquery.signalR-2.4.3.min.js"></script>
    <!--Reference the autogenerated SignalR hub script. -->
    <script src="signalr/hubs"></script><telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">
        <script type="text/javascript">
            $(function () {
                // Declare a proxy to reference the hub.  
                // Error Line 
                var hub = $.connection.progressHub;

                // Create a function that the hub can call to report progress.
                hub.client.receiveMessge = function (Item) {
                    $('#<%=lblCurrRec.ClientID%>').html(Item.SITE_CODE);
                    $('#<%=lblStat.ClientID%>').html(Item.STATUS);
                    $('#<%=lblRes.ClientID%>').html(Item.MESSAGE);
                };

                hub.client.UpdateTotal = function (iTotal, iSent, iNotSent) {
                    $('#<%=lblTotal.ClientID%>').html(iTotal);
                    $('#<%=lblRecsProc.ClientID%>').html(iSent);
                    $('#<%=lblErrorRecs.ClientID%>').html(iNotSent);
                };

                $.connection.hub.start();
            });
        </script>
    </telerik:RadScriptBlock>
    

When I run the code I get the following error:

 Cannot read properties of undefined (reading 'progressHub')

If I put all this in it's own test page and replace the RadScriptManager with the following it works flawlessly:

<asp:ScriptManager ID="MainScriptManager" runat="server" EnablePartialRendering="true" EnablePageMethods="true" AsyncPostBackTimeout="600" />

Hi There,

I have been reviewing quite a few forum posts and trying different suggestions, but I haven't found a solution that works for my situation. Help would be greatly appreciated. It's probably something simple that I'm missing.

I have a page that includes RadScriptManager, RadAjaxManager, RadSplitter, RadPane (with regular local content), RadSplitBar, and RadPane2 (contains other aspx pages like an iframe).

When RadPane2 contains another page, even if it's not an AJAX page, JavaScript calls to the RadAjaxManager from the primary page only fire the first time. I'm trying to call a method on the code behind page to update an item in a RadMenu.

If I have all the content is on one page without referring to a separate page, I can make multiple calls to the RadAjaxManager without problems.

Pieces of the code:

 <telerik:RadScriptManager ID="RadScriptManager1" runat="server" />
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" OnAjaxRequest="RadAjaxManager1_AjaxRequest">
                <AjaxSettings>
                  <telerik:AjaxSetting AjaxControlID="RadAjaxManager1">
                        <UpdatedControls>
                            <telerik:AjaxUpdatedControl ControlID="rmCounts"></telerik:AjaxUpdatedControl>
                        </UpdatedControls>
                    </telerik:AjaxSetting>
                </AjaxSettings>
</telerik:RadAjaxManager>

        <telerik:RadCodeBlock ID="RadCodeBlock1" runat="server" >
        <script type="text/javascript" language="JavaScript">
             function countUpdate() {
                var ajaxManager = $find("<%= RadAjaxManager1.ClientID %>");
                ajaxManager.ajaxRequest("updateCounts");
                return false;      }
        </script>
        </telerik:RadCodeBlock>

Example code behind method:

        public void RadAjaxManager1_AjaxRequest(object sender, AjaxRequestEventArgs e)
        {
            updateCountsCodeBehind();
        }

Thanks,

Dan