Hello Sowmya,

I would not expect the ColumnSpan property to create an issue in this case, but if you have a sample project I would like to see it. Our forum threads only allow an attachment to be < 1MB in size, which could be why you are getting the error. Please delete the bin and obj folders of the sample project you are trying to attach prior to trying to attach your sample.

Please let me know if you have any other questions or concerns on this matter.

<Window x:Class="XamRichTextEditorTblIssue.MainWindow"
xmlns="">schemas.microsoft.com/.../presentation"
xmlns:x="">schemas.microsoft.com/.../xaml"
xmlns:d="">schemas.microsoft.com/.../2008"
xmlns:mc="">schemas.openxmlformats.org/.../2006"
xmlns:local="clr-namespace:XamRichTextEditorTblIssue"
mc:Ignorable="d"
xmlns:ig="">schemas.infragistics.com/xaml"
Title="MainWindow" Height="350" Width="1050">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.Resources>
<Style TargetType="{x:Type ig:XamContextMenu}">
<EventSetter Event="Loaded" Handler="XamContextMenu_Loaded" />
</Style>
</Grid.Resources>
<StackPanel Margin ="10" Grid.Row="0" Orientation="Horizontal">
<Button Name="TextForXamRichTextEditor" Margin="3" Content="Text For XamRichTextEditor" HorizontalAlignment="Left" Background="LightBlue" Click="TextForXamRichTextEditor_Click"/>
<Button Name="TextForXamRichTextEditorWithColSpan" Margin="3" Content="Text For XamRichTextEditor WithColSpan" HorizontalAlignment="Left" Background="LightBlue" Click="TextForXamRichTextEditorWithColSpan_Click"/>
</StackPanel>
<ig:XamRichTextEditor Margin="5" Grid.Row="1" x:Name="xamrichtxtEditor">
<ig:XamRichTextEditor.ClipboardSerializationProviders>
<ig:WordSerializationProvider/>
<ig:RtfSerializationProvider/>
<ig:HtmlSerializationProvider/>
</ig:XamRichTextEditor.ClipboardSerializationProviders>
</ig:XamRichTextEditor>
</Grid>
</Window>

**********MainWindow.xaml****************

*********************************MainWindow.xaml.cs********************************

using System;
using System.Collections.Generic;
using System.Windows;
using Infragistics.Controls.Menus;
using Infragistics.Documents.RichText;

namespace XamRichTextEditorTblIssue
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}

private void ConstructHTMLTableForRichTextEditor()
{
try
{
string error = "";
xamrichtxtEditor.Document.RootNode.Body.ChildNodes.Clear();
TableNode tn = xamrichtxtEditor.Document.InsertTable(0, 7, 5, out error);
tn.Settings = new TableSettings();
int cRow = 0, cCol = 0;

if (error == null)
{
foreach (TableRowNode trn in tn.ChildNodes)
{
cCol = 0;
foreach (TableCellNode tcn in trn.ChildNodes)
{
ParagraphNode pn = tcn.ChildNodes[0] as ParagraphNode;
pn.SetText(string.Format("Ro {0}, Cel {1}", cRow, cCol));
cCol++;
}
cRow++;
}
}
}

catch (Exception ex)
{

}
}
private void ConstructHTMLTableWithColSpanForRichTextEditor()
{
try
{
string error = "";
xamrichtxtEditor.Document.RootNode.Body.ChildNodes.Clear();
TableNode tn = xamrichtxtEditor.Document.InsertTable(0, 7, 5, out error);
tn.Settings = new TableSettings();
int cRow = 0, cCol = 0;

tn.Rows[1].Cells[1].Settings = new TableCellSettings
{
FitText = true,
Wrap = true,
ColumnSpan = 2,
};

tn.Rows[1].Cells[3].Settings = new TableCellSettings
{
FitText = true,
Wrap = true,
ColumnSpan = 2,
};

//Commented lines to look at
//Note taht when cells which are column spanned are copied and pasted over a text editor or excel,
//they are not getting pasted in teh same way, and thats not teh case with the contents copied without column spanned

if (error == null)
{
foreach (TableRowNode trn in tn.ChildNodes)
{
cCol = 0;
foreach (TableCellNode tcn in trn.ChildNodes)
{
ParagraphNode pn = tcn.ChildNodes[0] as ParagraphNode;
pn.SetText(string.Format("Ro {0}, Cel {1}", cRow, cCol));
cCol++;
}
cRow++;
}
}
}

catch (Exception ex)
{

}
}

private void TextForXamRichTextEditor_Click(object sender, RoutedEventArgs e)
{
ConstructHTMLTableForRichTextEditor();
}

private void XamContextMenu_Loaded(object sender, RoutedEventArgs e)
{
List<object> itemsToRemove = new List<object>();

XamContextMenu menu = sender as XamContextMenu;

foreach (var x in menu.Items)
{
if (x is XamMenuItem)
{
XamMenuItem item = x as XamMenuItem;
if (item.Header == null || !item.Header.ToString().Contains("Copy"))
itemsToRemove.Add(item);
}
else
itemsToRemove.Add(x);
}

foreach (var y in itemsToRemove)
menu.Items.Remove(y);
}

private void TextForXamRichTextEditorWithColSpan_Click(object sender, RoutedEventArgs e)
{
ConstructHTMLTableWithColSpanForRichTextEditor();
}
}
}

*********************************MainWindow.xaml.cs********************************

And references used in my project:

InfragisticsWPF4.Controls.Editors.XamRichTextEditor.v16.1.dll

InfragisticsWPF4.Controls.Menus.XamMenu.v16.1.dll

InfragisticsWPF4.Documents.Core.v16.1.dll

InfragisticsWPF4.Documents.Excel.v16.1.dll

InfragisticsWPF4.Documents.RichTextDocument.Html.v16.1.dll

InfragisticsWPF4.Documents.RichTextDocument.Rtf.v16.1.dll

InfragisticsWPF4.Documents.RichTextDocument.v16.1.dll

InfragisticsWPF4.Documents.RichTextDocument.Word.v16.1.dll

Hope this helps, you can create a new project or in your existing project add a window and copy the contents i used in the xaml and xaml.cs file , and run the project referring this window.  

NOTE: When cells which are col spanned, are copied and pasted on a text editor or excel spreadsheet , the values are not getting copied in teh same way as in the source.