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How to avoid RadAjaxLoadingPanel

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giuseppe
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giuseppe asked on 20 Mar 2011, 12:02 PM
Hello,

I am using a RadGrid that should be refreshed every 2 seconds.I setup a asp:timer and RadAjaxManager on the page and everything is working fine. What I would like to acheive is to avoid the RadAjaxLoadingPanel to be shown douring refresh; in other words I would like to get the new rows in the Grid without showing to the user that the page is loading again.
If I am seeting the RadAjaxLoadingPanel visible = false, the grid doesn't refresh and the same if RadAjaxLoadingPanel is not set within RadAjaxManager.
Do you have any suggestion?

Thanks, Giuseppe

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Mira
Telerik team
answered on 21 Mar 2011, 01:06 PM
RadAjaxGridTimer405347.zip
Hello Giuseppe,

I tried to replicate the issue which you described, but to no avail.
Attached to this message, you will find the code which I used for testing.

Please, take a look at it and let me know if there are any differences at your end, which I may be leaving out.

Regards,
Mira
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giuseppe
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answered on 21 Mar 2011, 08:33 PM

Now without touching anything I am getting this on any radcontrol
---------------------------

---------------------------
Error creating template groups. Reason: System.InvalidCastException: Impossibile eseguire il cast di [A]Telerik.Web.UI.RadGrid a [B]Telerik.Web.UI.RadGrid. Il tipo A ha origine da 'Telerik.Web.UI, Version=2011.1.315.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4' nel contesto 'LoadNeither' nella posizione 'C:\Users\LAP3\AppData\Local\Microsoft\VisualStudio\10.0\ProjectAssemblies\v0x8yve501\Telerik.Web.UI.dll'. Il tipo B ha origine da 'Telerik.Web.UI, Version=2011.1.315.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4' nel contesto 'LoadNeither' nella posizione 'C:\Users\LAP3\AppData\Local\Microsoft\VisualStudio\10.0\ProjectAssemblies\mwkevpwv01\telerik.web.ui.dll'.

   in Telerik.Web.Design.RadGridDesigner.get_TemplateGroups()
---------------------------
OK  
---------------------------

Here is the code:

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="chat.aspx.vb" Inherits="ChatApp.chat" %>
  
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      
    <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
        <Scripts>
            <%--Needed for JavaScript IntelliSense in VS2010--%>
            <%--For VS2008 replace RadScriptManager with ScriptManager--%>
            <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>
        <telerik:RadFormDecorator ID="RadFormDecorator1" Runat="server" 
            DecoratedControls="All" Skin="Sitefinity" />
    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="Timer1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="Panel1" />
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>
        <br />
  
<!--start-->
        <telerik:RadToolTipManager ID="RadToolTipManager1" runat="server">
        </telerik:RadToolTipManager>
        <telerik:RadToolTip ID="RadToolTip1" runat="server">
        </telerik:RadToolTip>
        <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" 
            Skin="Default" Height="16px" Width="16px">
        </telerik:RadAjaxLoadingPanel>
        <asp:Panel ID="Panel1" runat="server">
    
               <telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" 
                AutoGenerateColumns="False" CellSpacing="0" DataSourceID="SqlDataSource1" 
                GridLines="None" ShowHeader="False" Width="300px" Culture="(Default)">
                <MasterTableView DataKeyNames="id" DataSourceID="SqlDataSource1">
                    <CommandItemSettings ExportToPdfText="Export to PDF" />
                    <RowIndicatorColumn FilterControlAltText="Filter RowIndicator column">
                        <HeaderStyle Width="20px" />
                    </RowIndicatorColumn>
                    <ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column">
                        <HeaderStyle Width="20px" />
                    </ExpandCollapseColumn>
                    <Columns>
                        <telerik:GridBoundColumn DataField="id" DataType="System.Int32" 
                            FilterControlAltText="Filter id column" HeaderText="id" ReadOnly="True" 
                            SortExpression="id" UniqueName="id">
                        </telerik:GridBoundColumn>
                        <telerik:GridBoundColumn DataField="From_User" DataType="System.Int32" 
                            FilterControlAltText="Filter From_User column" HeaderText="From_User" 
                            SortExpression="From_User" UniqueName="From_User">
                        </telerik:GridBoundColumn>
                        <telerik:GridBoundColumn DataField="To_User" DataType="System.Int32" 
                            FilterControlAltText="Filter To_User column" HeaderText="To_User" 
                            SortExpression="To_User" UniqueName="To_User">
                             
                        </telerik:GridBoundColumn>
                        <telerik:GridBoundColumn DataField="Message_Original" 
                            FilterControlAltText="Filter Message_Original column" 
                            HeaderText="Message_Original" SortExpression="Message_Original" 
                            UniqueName="Message_Original">
                        </telerik:GridBoundColumn>
                        <telerik:GridBoundColumn DataField="Message_Translated" 
                            FilterControlAltText="Filter Message_Translated column" 
                            HeaderText="Message_Translated" SortExpression="Message_Translated" 
                            UniqueName="Message_Translated">
                        </telerik:GridBoundColumn>
                        <telerik:GridBoundColumn DataField="Translated_To" 
                            FilterControlAltText="Filter Translated_To column" HeaderText="Translated_To" 
                            SortExpression="Translated_To" UniqueName="Translated_To">
                        </telerik:GridBoundColumn>
                        <telerik:GridBoundColumn DataField="Date_Time" DataType="System.DateTime" 
                            FilterControlAltText="Filter Date_Time column" HeaderText="Date_Time" 
                            SortExpression="Date_Time" UniqueName="Date_Time">
                        </telerik:GridBoundColumn>
                        <telerik:GridCheckBoxColumn DataField="ShownOnRecipent" 
                            DataType="System.Boolean" FilterControlAltText="Filter ShownOnRecipent column" 
                            HeaderText="ShownOnRecipent" SortExpression="ShownOnRecipent" 
                            UniqueName="ShownOnRecipent">
                        </telerik:GridCheckBoxColumn>
                    </Columns>
                    <EditFormSettings>
                        <EditColumn FilterControlAltText="Filter EditCommandColumn column">
                        </EditColumn>
                    </EditFormSettings>
                </MasterTableView>
                <PagerStyle Mode="Slider" />
                <FilterMenu EnableImageSprites="False">
                </FilterMenu>
                <HeaderContextMenu CssClass="GridContextMenu GridContextMenu_Default">
                </HeaderContextMenu>
            </telerik:RadGrid>
   
<asp:Timer id="Timer1" runat="server" Interval="5000"></asp:Timer>            
        </asp:Panel>
  
              
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DBConnection %>"
            SelectCommand="SELECT * FROM [chat] ORDER BY [id] DESC">
        </asp:SqlDataSource>
  
  
      
        
      
  
              
  
<!--end-->
    </div>
    </form>
</body>
</html>
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Mira
Telerik team
answered on 22 Mar 2011, 05:19 PM
Hello Giuseppe,

I suggest that you examine the Error creating template groups - for all controls forum thread elaborating on the same issue.

Please let me know whether it helps.

All the best,
Mira
the Telerik team
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