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Serious bug: programatically added columns and postback!

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Grid

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

EB asked on 08 Sep 2008, 10:12 AM

Hi all,

I'm using latest RadGrid (build 2008.2.826.35).

Problem with this code: Extra columns (no header text) keep adding at every post-back!!! even I call the Clear() method of the Columns collection. That doesn't do anything.

By putting the DefineGridStructure() method in Page_Load, instead of Page_Init, everytime the page is posted back, all column header texts and link buttons disappear.

ASPX:

    
            <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default2.aspx.cs" Inherits="ING.MasterFund.RoadRunner.Web.Default2" %> 
        
            <%@ 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"> 
        
                <telerik:RadScriptManager ID="RadScriptManager1" runat="server" /> 
        
                <asp:PlaceHolder ID="PlaceHolder1" runat="server" /> 
        
                <br /> 
        
                <asp:Button ID="_postBackButton" runat="server" Text="Post Back" /> 
        
                </form> 
        
            </body> 
        
            </html>

Code-Behind:

    
            using System; 
        
            using System.Collections.Generic; 
        
            using System.Linq; 
        
            using System.Web.UI; 
        
            using Telerik.Web.UI; 
        
            namespace ING.MasterFund.RoadRunner.Web 
        
            { 
        
                public partial class Default2 : Page 
        
                { 
        
                    public class Customer 
        
                    { 
        
                        public string ID { get; set; } 
        
                        public string Name { get; set; } 
        
                    } 
        
                    protected void Page_Init( object sender, EventArgs e ) 
        
                    { 
        
                        DefineGridStructure(); 
        
                    } 
        
                    protected void Page_Load( object sender, EventArgs e ) 
        
                    { 
        
                        if ( !IsPostBack ) 
        
                        { 
        
                            List<Customer> customers = new List<Customer> 
        
                                                           { 
        
                                                                   new Customer {ID = "0", Name = "John"}, 
        
                                                                   new Customer {ID = "1", Name = "Peter"}, 
        
                                                                   new Customer {ID = "2", Name = "Heo"} 
        
                                                           }; 
        
                            RadGrid grid = (RadGrid) PlaceHolder1.Controls[0]; 
        
                            grid.DataSource = customers; 
        
                            grid.DataBind(); 
        
                        } 
        
                    } 
        
                    protected void DefineGridStructure() 
        
                    { 
        
                        RadGrid grid = new RadGrid(); 
        
                        PlaceHolder1.Controls.Add(grid); 
        
                        grid.AutoGenerateColumns = false; 
        
                        grid.MasterTableView.Columns.Clear(); 
        
                        grid.MasterTableView.Columns.Add(new GridBoundColumn {DataField = "ID", HeaderText = "ID"}); 
        
                        grid.MasterTableView.Columns.Add(new GridBoundColumn {DataField = "Name", HeaderText = "Name"}); 
        
                        grid.MasterTableView.Columns.Add(new GridButtonColumn {ButtonType = GridButtonColumnType.LinkButton, HeaderText = "Action", Text = "click"}); 
        
                    } 
        
                } 
        
            }

Serious bug: programatically added columns and postback!

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