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copied!<p>It would be very helpful to see the structure of your data. What in the world is a "unified comment - list"? What do you mean by "irregular data"? </p> <p>Anyway, in my experience, the best tool in Winforms to deal with tabular data is <code>DataGridView</code>. You can have combobox cells, image cells. You can easily format and color them, validate and disable when necessary.</p> <hr> <p>Edit: more info</p> <p>What you need is basically some colspan, easibly obtainable in HTML grids. You can't do that easily in DataGridView, quoting the Ms DataGridView program manager</p> <pre><code>The DataGridView does not have any support for merging cells. You can custom paint content across cells, but apart from that you would have to do a lot of work and custom coding to produce merged editable cells. </code></pre> <p>but you could buy a 3rd party component (<a href="http://www.telerik.com/help/winforms/gridview-overview.html" rel="nofollow noreferrer">Telerik GridView</a> or similar) or search for a custom implementation like this:</p> <p><a href="http://www.codeproject.com/Articles/34037/DataGridVewTextBoxCell-with-Span-Behaviour" rel="nofollow noreferrer">DataGridVewTextBoxCell with Span Behaviour</a> </p> <p>Maybe this can be useful too:</p> <p><a href="http://www.codeproject.com/Articles/18330/Multi-Column-Combo-Cell-for-NET-2-0-DataGridView-c" rel="nofollow noreferrer">Multi Column Combo Cell for the .NET 2.0 DataGridView Control</a></p> <p><a href="http://social.msdn.microsoft.com/Forums/windows/en-US/fea3dcff-5447-450a-8f7c-bb1c4f63371d/merging-cells-in-datagridview?forum=winformsdatacontrols" rel="nofollow noreferrer">http://social.msdn.microsoft.com/Forums/windows/en-US/fea3dcff-5447-450a-8f7c-bb1c4f63371d/merging-cells-in-datagridview?forum=winformsdatacontrols</a></p> <hr> <p>EDIT 3: Ok, if you just need to display your data why don't you try adding in your winform a <code>webBrowser</code> component, compose your HTML text and then display it? You can add style, font, colors etc etc like any web page.</p> <p>Sample</p> <pre><code>private void showHtml() { var htmlstring = @"<html><table border='1'> <tr> <td>Red</td> <td>Green</td> <td>Purple</td> <td>Blue</td> </tr> <tr> <td colspan='4'>Comment that is one single piece of data</td> </tr> <tr> <td colspan='2'>Foo</td> <td colspan='2'>Bar</td> </tr> <tr> <td>Red</td> <td>Green</td> <td>Purple</td> <td>Blue</td> </tr> <tr> <td>Red</td> <td>Green</td> <td>Purple</td> <td>Blue</td> </tr> <tr> <td colspan='4'>Comment that is one single piece of data</td> </tr> <tr> <td>One</td> <td>Two</td> <td>Three</td> <td>Four</td> </tr> </table> </html>"; webBrowser1.DocumentText = htmlstring; } </code></pre> <p><img src="https://i.stack.imgur.com/xeoJL.png" alt="http://oi40.tinypic.com/2uygkjt.jpg"></p>

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