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GridTemplateColumn issue

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Matias
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Matias asked on 18 Oct 2012, 06:10 PM

Hi everybody and thanks for your help! Im facing this problem: Ive a Radgrid which has a GridTemplateColumn which has a CheckBox inside. In the page load 1 row is inserted in the radgrid and displayed properly. Then, there is a RadButton (which only Works in the client side). When pressed it binds the radgrid to a new datasource with 2 rows. The problem is that the first row is displayed correctly while the second row is missing the checkbox. I did not use Eval since the radgrid must be bind in the client side (then, Ive used gridRowBound and gridRowCreated). Ive prepared an example code to show exactly this problem: you just need to créate a Web Application “WebApplicationRadGridCheckBox” and modify the Default.aspx code with the code below.

Thank you very much! Matias

Default.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplicationRadGridCheckBox._Default" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<!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>
    <telerik:RadScriptBlock ID="RadScriptBlockTipoDocumentoDetails" runat="server">
        <script type="text/javascript">
            function Add(sender, eventArgs) {
                var grid = $find("<%=RadGridTest.ClientID %>");
                var mt = grid.get_masterTableView();
                var items = mt.get_dataItems();
                var source = new Array();
                var item = { Field1: false, Field2: "new item 1!!!" };
                source[source.length] = item;
                var item2 = { Field1: false, Field2: "new item 2!!!" };
                source[source.length] = item2;
                mt.set_dataSource(source);
                mt.dataBind();
            }
            function gridRowBound (sender, args) {
                var checkbox = args.get_item().findElement("Field1");
                if (checkbox && checkbox != null) {
                    checkbox.checked = args.get_dataItem().Field1 == "True";
                }
            }
            function gridRowCreated (sender, args) {
                var checkbox = args.get_item().findElement("Field1");
                if (checkbox && checkbox != null) {
                    checkbox.checked = args._gridDataItem.getDataKeyValue("Field1") == "True";
                }
            }
        </script>
    </telerik:RadScriptBlock>
    <form id="form1" runat="server">
        <asp:ScriptManager runat="server" ID="ScriptManager1"/>
        <div>
            <telerik:RadButton ID="RadButton1" runat="server" Text="Add" OnClientClicked="Add" UseSubmitBehavior="false" AutoPostBack="false"/>
            <telerik:RadGrid ID="RadGridTest" runat="server" AutoGenerateColumns="false" AllowMultiRowSelection="true" Height="200px">
                <MasterTableView Caption="" ClientDataKeyNames="Field1,Field2" DataKeyNames="Field1,Field2">
                    <Columns>
                        <telerik:GridTemplateColumn>
                            <ItemTemplate>
                                <asp:CheckBox ID="Field1" runat="server"/>
                            </ItemTemplate>
                        </telerik:GridTemplateColumn>
                        <telerik:GridBoundColumn HeaderText="Field2" DataField="Field2"/>
                    </Columns>
                </MasterTableView>
                <ClientSettings EnableRowHoverStyle="true" >
                    <Selecting AllowRowSelect="true" />
                    <Scrolling AllowScroll="True" SaveScrollPosition="True"/>
                    <ClientEvents   OnRowDataBound="gridRowBound"
                                    OnRowCreated="gridRowCreated"/>
                </ClientSettings>
            </telerik:RadGrid>
        </div>
    </form>
</body>
</html>


Default.aspx.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplicationRadGridCheckBox
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            List<TestClass> lista = new List<TestClass>() { new TestClass() { Field1 = true, Field2 = "JOJO" } };
            RadGridTest.DataSource = lista;
            RadGridTest.DataBind();
        }
    }
    public class TestClass
    {
        public Boolean Field1 { get; set; }
        public String Field2 { get; set; }
    }
}

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Radoslav
Telerik team
answered on 23 Oct 2012, 08:20 AM
Hi Matias,

The described behavior is expected. When a template column is used in client side data binding scenarios the controls into the template column needs to be added manually. More information you could find here:
http://www.telerik.com/help/aspnet-ajax/grid-client-side-binding-specifics.html (Generate title and href attributes for hyperlinks on the client section) and here:
http://demos.telerik.com/aspnet-ajax/grid/examples/client/livedata/defaultcs.aspx

Please give it try and let me know if it helps you.

Greetings,
Radoslav
the Telerik team
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Matias
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Radoslav
Telerik team
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