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getDataKeyValue returns null on client-side when grid is created dynamically server-side

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Grid

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

Mark DeMichele asked on 24 Oct 2008, 01:54 AM

Hi there,

I have a page where the grid is being created dynamically at the Page_Init stage. I am using the DataKeyNames property in order to specify the fields whose key values are to be saved, but this property seems to have no effect when using Javascript to obtain the values client-side. A view of the page source in the browser reveals that the client script that is normally generated containing the values isn't generated in this case.

I've been able to replicate the problem with a simple test page, the code of which is posted below. Maybe I'm doing something wrong?

Thanks,
Mark

ASPX:

    
            <%@ Page Language="C#" AutoEventWireup="true" CodeFile="TestProgrammaticRadGrid.aspx.cs" Inherits="Test_TestProgrammaticRadGrid" %> 
        
            <%@ 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> 
        
                <telerik:RadCodeBlock runat="server"> 
        
                <script language="javascript" type="text/javascript"> 
        
                    function TestButton_onclick() 
        
                    { 
        
                        var radGrid = $find('<%=TestRadGrid.ClientID %>'); 
        
                        var rows = radGrid.get_masterTableView().get_dataItems(); 
        
                        alert('# items: ' + rows.length); 
        
                        alert('first PK: ' + rows[0].getDataKeyValue('ID')); 
        
                    } 
        
                </script> 
        
                </telerik:RadCodeBlock> 
        
            </head> 
        
            <body> 
        
                <form id="form1" runat="server"> 
        
                <div> 
        
                    <asp:ScriptManager ID="ScriptManager1" runat="server"> 
        
                    </asp:ScriptManager> 
        
                    <asp:PlaceHolder ID="GridPlaceholder" runat="server" />        
        
                    <input type="button" id="TestButton" value="Click Here" onclick="return TestButton_onclick();" /> 
        
                </div> 
        
                </form> 
        
            </body> 
        
            </html>

Code behind:

    
            using System; 
        
            using System.Collections.Generic; 
        
            using System.Linq; 
        
            using System.Web; 
        
            using System.Web.UI; 
        
            using System.Web.UI.WebControls; 
        
            using Telerik.Web.UI; 
        
            public partial class Test_TestProgrammaticRadGrid : System.Web.UI.Page 
        
            { 
        
                protected void Page_Load(object sender, EventArgs e) 
        
                { 
        
                    if (!IsPostBack) 
        
                        PopulateGrid(); 
        
                } 
        
                private void PopulateGrid() 
        
                { 
        
                    List<TestData> list = new List<TestData>(); 
        
                    for (int i = 0; i < 11; i++) 
        
                        list.Add(new TestData(i, "test " + i.ToString())); 
        
                    TestRadGrid.DataSource = list; 
        
                    TestRadGrid.DataBind(); 
        
                } 
        
                protected void Page_Init(object sender, EventArgs e) 
        
                { 
        
                    DefineGridStructure(); 
        
                } 
        
                private void DefineGridStructure() 
        
                { 
        
                    TestRadGrid = new RadGrid(); 
        
                    TestRadGrid.AutoGenerateColumns = false; 
        
                    InitializeProblemGrid(TestRadGrid); 
        
                    AddCenteredColumn(TestRadGrid, "ID", "ID", "ID"); 
        
                    AddCenteredColumn(TestRadGrid, "Name", "Name", "Name"); 
        
                    GridPlaceholder.Controls.Add(TestRadGrid); 
        
                } 
        
                private void InitializeProblemGrid(RadGrid radGrid) 
        
                { 
        
                    radGrid.MasterTableView.DataKeyNames = new string[] { "ID" }; 
        
                    radGrid.ClientSettings.Selecting.AllowRowSelect = true; 
        
                } 
        
                private void AddCenteredColumn(RadGrid radGrid, string uniqueName, string headerText, string dataField) 
        
                { 
        
                    GridBoundColumn column = new GridBoundColumn(); 
        
                    column.UniqueName = uniqueName; 
        
                    column.HeaderText = headerText; 
        
                    column.DataField = dataField; 
        
                    column.HeaderStyle.HorizontalAlign = HorizontalAlign.Center; 
        
                    column.ItemStyle.HorizontalAlign = HorizontalAlign.Center; 
        
                    radGrid.MasterTableView.Columns.Add(column); 
        
                } 
        
                private RadGrid _TestRadGrid; 
        
                protected RadGrid TestRadGrid 
        
                { 
        
                    get { return _TestRadGrid; } 
        
                    set { _TestRadGrid = value; } 
        
                } 
        
            } 
        
            public class TestData 
        
            { 
        
                public TestData(int id, string name) 
        
                { 
        
                    _ID = id; 
        
                    _Name = name; 
        
                } 
        
                public int ID 
        
                { 
        
                    get { return _ID; } 
        
                    set { _ID = value; } 
        
                } 
        
                public string Name 
        
                { 
        
                    get { return _Name; } 
        
                    set { _Name = value; } 
        
                } 
        
                private int _ID; 
        
                private string _Name; 
        
            }

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getDataKeyValue returns null on client-side when grid is created dynamically server-side

1 Answer, 1 is accepted