This is a migrated thread and some comments may be shown as answers.

Can you use a RadComboBox in XMLHttpPanel?

2 Answers 144 Views

XmlHttpPanel

This is a migrated thread and some comments may be shown as answers.

Eric asked on 12 Nov 2009, 09:53 PM

I'd like to know if it's possible to use a RadCombobox within an XMLHttpPanel.

My attempts thus far yield the following error:

"XMLHttpPanel Callback Loading error:
Exception=Script control 'cmbo2' is not a registered script control. Script controls must be registered using RegisterScriptControl() before calling RegisterScriptDescriptors().
Parameter name: scriptControl"

My code looks like this:

    
            <%@ Page Language="VB" %> 
        
            <%@ Register assembly="Telerik.Web.UI" namespace="Telerik.Web.UI" tagprefix="telerik" %> 
        
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/tr/xhtml11/DTD/xhtml11.dtd"> 
        
            <script runat="server">  
        
                Protected Overrides Sub OnPreRender(ByVal e As EventArgs)  
        
                    MyBase.OnPreRender(e)  
        
                    ScriptManager1.RegisterScriptControl(Of RadComboBox)(cmbo2)  
        
                End Sub  
        
                Protected Sub XmlHttpPanel_ServiceRequest(ByVal sender As Object, ByVal e As RadXmlHttpPanelEventArgs)  
        
                    Dim val As String = e.Value  
        
                    'Simulate a longer process  
        
                    System.Threading.Thread.Sleep(1000)  
        
                    cmbo2.Items.Clear()  
        
                    lbl1.Text = Now 
        
                End Sub  
        
            </script> 
        
            <html xmlns="http://www.w3.org/1999/xhtml">  
        
                <head id="Head1">  
        
                    <title></title>  
        
                    <script language="javascript" type="text/javascript">  
        
                        function cmboChanged(sender, args) {  
        
                            var panel = $find("<%=RadXmlHttpPanel1.ClientID%>");  
        
                            panel.set_value("");  
        
                        }  
        
                    </script>                  
        
                </head> 
        
                <body> 
        
                <form id="form1" method="post" runat="server">  
        
                    <telerik:RadScriptManager runat="server" ID="ScriptManager1" /> 
        
                    <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" Skin="Default"></telerik:RadAjaxLoadingPanel> 
        
                    <telerik:RadComboBox runat="server" ID="cmbo1" OnClientSelectedIndexChanged="cmboChanged" > 
        
                        <Items> 
        
                            <telerik:RadComboBoxItem Text="1" Value="1" /> 
        
                            <telerik:RadComboBoxItem Text="2" Value="2" /> 
        
                            <telerik:RadComboBoxItem Text="3" Value="3" /> 
        
                            <telerik:RadComboBoxItem Text="4" Value="4" /> 
        
                        </Items> 
        
                    </telerik:RadComboBox> 
        
                    <telerik:RadXmlHttpPanel   
        
                        ID="RadXmlHttpPanel1" runat="server"   
        
                        LoadingPanelID="RadAjaxLoadingPanel1" 
        
                        OnServiceRequest="XmlHttpPanel_ServiceRequest">  
        
                        <telerik:RadComboBox runat="server" ID="cmbo2" > 
        
                            <Items> 
        
                                <telerik:RadComboBoxItem Text="1" Value="1" /> 
        
                                <telerik:RadComboBoxItem Text="2" Value="2" /> 
        
                                <telerik:RadComboBoxItem Text="3" Value="3" /> 
        
                                <telerik:RadComboBoxItem Text="4" Value="4" /> 
        
                            </Items> 
        
                        </telerik:RadComboBox>      
        
                        <asp:Label runat="server" id="lbl1" /> 
        
                    </telerik:RadXmlHttpPanel> 
        
                    </form> 
        
                </body> 
        
            </html>

2 Answers, 1 is accepted

Accepted

answered on 16 Nov 2009, 12:31 PM

Hi Steve,

Yes it is possible to place a RadComboBox inside the RadXmlHttpPanel. When using any RadControl inside the Panel you need to set the RegisterWithScriptManager property to false. Also set the EnableClientScriptEvaluation property to true, so that the client scripts loaded from the RadComboBox are evaluated and you can use its client-side methods and properties.

Do not hesitate to contact us if you have any other questions.

Sincerely yours,
Pero
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Watch a video on how to optimize your support resource searches and check out more tips on the blogs.