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Linq paging radajaxmanager

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David Simmonds
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David Simmonds asked on 30 Apr 2010, 08:14 PM
I have a form with a grid in it that uses a LinqDataSource. The Selecting event is wired up to return the number of rows. I use a RadAjaxManager and a RadAjaxLoadingPanel. However, when I click on a paging control the grid "flashes" and the loading "wheel" does not appear like the 300,000 Linq demo shows. The paging does work though. How do I make the loading stuff work? I have supplied the code for a cutback version of what I am doing in a real web app.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm8.aspx.cs" Inherits="CharityCheck.WebForm8" %> 
<%@ Register assembly="Telerik.Web.UI" namespace="Telerik.Web.UI" tagprefix="telerik" %> 
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
 
<html xmlns="http://www.w3.org/1999/xhtml">  
<head runat="server">  
    <title></title>  
</head> 
<body> 
    <form id="form1" runat="server">  
    <div> 
        <asp:Panel ID="Panel1" runat="server">  
            <telerik:RadScriptManager ID="RadScriptManager1" runat="server" ScriptMode="Release" /> 
            <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" > 
                <AjaxSettings> 
                    <telerik:AjaxSetting AjaxControlID="RadGrid1">  
                        <UpdatedControls> 
                            <telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1" /> 
                        </UpdatedControls> 
                    </telerik:AjaxSetting> 
                </AjaxSettings> 
            </telerik:RadAjaxManager> 
            <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" /> 
            <telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True"   
                Skin="Office2007" GridLines="None"   
                AutoGenerateColumns="False"   
                DataSourceID="LinqDataSource1" > 
                <MasterTableView TableLayout="Fixed" > 
                    <Columns> 
                        <telerik:GridBoundColumn DataField="CompanyName" DefaultInsertValue=""   
                            HeaderText="CompanyName" SortExpression="CompanyName"   
                            UniqueName="CompanyName" ReadOnly="True" > 
                        </telerik:GridBoundColumn> 
                        <telerik:GridBoundColumn DataField="ID" DefaultInsertValue="" 
                            HeaderText="ID" SortExpression="ID" UniqueName="ID"   
                            DataType="System.Int32" ReadOnly="True">  
                        </telerik:GridBoundColumn> 
                    </Columns> 
                </MasterTableView> 
                <ClientSettings>    
                    <selecting allowrowselect="True" /> 
                </ClientSettings>    
                <PagerStyle Position="TopAndBottom" /> 
            </telerik:RadGrid> 
 
            <asp:LinqDataSource ID="LinqDataSource1" runat="server"   
                AutoPage="False" ContextTypeName="CharityCheck.CharityCheckEntities"   
                onselecting="LinqDataSource1_Selecting"   
                TableName="CompanySet" OrderBy="CompanyName"   
                Select="new (CompanyName, ID)">  
            </asp:LinqDataSource> 
        </asp:Panel>         
    </div> 
    </form> 
</body> 
</html> 
 
using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Web;  
using System.Web.UI;  
using System.Web.UI.WebControls;  
using Infragistics.WebUI.UltraWebGrid;  
using Telerik.Web.UI;  
 
namespace CharityCheck  
{  
    public partial class WebForm8 : System.Web.UI.Page  
    {  
        protected void Page_Load(object sender, EventArgs e)  
        {  
 
        }  
 
        protected void LinqDataSource1_Selecting(object sender, LinqDataSourceSelectEventArgs e)  
        {  
            CharityCheckEntities entities = new CharityCheckEntities();  
            var data = from company in entities.CompanySet  
                       select company;  
            e.Arguments.TotalRowCount = data.Count();  
        }  
    }  
}  
 

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Pavlina
Telerik team
answered on 05 May 2010, 10:29 AM
Hi David,

Please, try setting EnableLinqExpressions property to false and let me know about the result.

Regards,
Pavlina
the Telerik team

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David Simmonds
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answered on 05 May 2010, 01:57 PM
That did not change anything. I had to add Skin="Default". That's pretty lame but at least it works.
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David Simmonds
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Pavlina
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David Simmonds
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