Not answered span cells in grid over multiple positions

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Telerik Admin Master

Posted on Feb 14, 2007 (permalink)

Requirements
RadGrid for ASP .NET version RadControls for ASP .NET AJAX version	4.5.x and later 2008.1.415 and later
.NET version	2.0 and later
Visual Studio version	2005 and later
Programming language	C#
Browser support	all supported by RadGrid for ASP .NET all browsers supported by RadControls for ASP .NET AJAX

PROJECT DESCRIPTION
This project demostrates how to span any given cell over a number of rows/columns, with autogenerated columns in the control. This can be useful when you want to add additional information pertaining only to a small subset of the data in the control.

Attached files

Sean

Posted on Oct 31, 2008 (permalink)

This solution doesn't work when the page is posted back. When it is posted back an additional column is added to the far right. To reproduce just add a button to the page and click it. What is causing this?

Yavor Yavor

Posted on Nov 3, 2008 (permalink)

Hello Sean,

To eliminate the issue, you can alter the code-behind to:

.cs

    
            using System;  
        
            using System.Data;  
        
            using System.Configuration;  
        
            using System.Collections;  
        
            using System.Web;  
        
            using System.Web.Security;  
        
            using System.Web.UI;  
        
            using System.Web.UI.WebControls;  
        
            using System.Web.UI.WebControls.WebParts;  
        
            using System.Web.UI.HtmlControls;  
        
            using Telerik.WebControls;  
        
            public partial class _Default : System.Web.UI.Page  
        
            {  
        
                protected void RadGrid1_NeedDataSource(object source, GridNeedDataSourceEventArgs e)  
        
                {  
        
                    DataTable table = new DataTable();  
        
                    table.Columns.Add("Column1");  
        
                    table.Columns.Add("Column2");  
        
                    table.Columns.Add("Column3");  
        
                    table.Rows.Add(new object[] { "Cell11", "Cell12", "Cell13" });  
        
                    table.Rows.Add(new object[] { "Cell21", "Cell22", "Cell23" });  
        
                    table.Rows.Add(new object[] { "Cell31", "Test", "Test" });  
        
                    table.Rows.Add(new object[] { "Test", "Cell42", "Cell43" });  
        
                    table.Rows.Add(new object[] { "Test", "Cell52", "Cell53" });  
        
                    RadGrid1.DataSource = table;  
        
                }  
        
                protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)  
        
                {  
        
                }  
        
                protected void RadGrid1_ItemCreated(object sender, GridItemEventArgs e)  
        
                {  
        
                }  
        
                protected void RadGrid1_PreRender(object sender, EventArgs e)  
        
                {  
        
                    foreach (GridDataItem dataItem in RadGrid1.MasterTableView.Items)  
        
                    {  
        
                        if (dataItem["Column2"].Text == dataItem["Column3"].Text)  
        
                            {  
        
                                dataItem["Column2"].ColumnSpan = 2;                      
        
                                dataItem["Column3"].Visible = false;  
        
                            }  
        
                            int previousItemIndex = dataItem.ItemIndex - 1;  
        
                            if (previousItemIndex >= 0)  
        
                            {  
        
                                if (dataItem["Column1"].Text == dataItem.OwnerTableView.Items[previousItemIndex]["Column1"].Text)  
        
                                {  
        
                                    dataItem.OwnerTableView.Items[previousItemIndex]["Column1"].RowSpan = 2;                          
        
                                    dataItem["Column1"].Visible = false;  
        
                                }  
        
                            }  
        
                    }  
        
                }  
        
            }