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POWhen copying and pasting Excel data, colors are lost
 

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  1. POWhen copying and pasting Excel data, colors are lost
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    <p>At the risk of having this question downvoted into oblivion or closed as "Too Localized", I figured I would post about this issue since my boss complains constantly about it and it has me scratching my head.</p> <p>We use the <a href="http://www.infragistics.com/products/dotnet/" rel="nofollow noreferrer">Infragistics NetAdvantage</a> <a href="http://www.infragistics.com/products/aspnet/excel-exporter/" rel="nofollow noreferrer">Excel control</a> to create an Excel report on the fly. Some cells, we add a fill color like so:</p> <pre><code>sheet.Rows[i].Cells[0].CellFormat.FillPattern = FillPatternStyle.Solid; sheet.Rows[i].Cells[0].CellFormat.FillPatternForegroundColor = Color.FromArgb(127, 127, 127); </code></pre> <p>This works great and the report comes out looking fine:</p> <p><img src="https://i.stack.imgur.com/Dy6ui.png" alt="Working Image"></p> <p>However, if my manager selects all the cells in Excel, copies the data to the clipboard, then <em>pastes</em> those cells into another Excel file, all the colors are converted into some weird 3bit palette:</p> <p><img src="https://i.stack.imgur.com/2qfNw.png" alt="enter image description here"></p> <p>Now, every Fill color is either pure red (#FF0000), pure green (#00FF00), pure blue (#0000FF) or yellow (#FFFF00). It's all or nothing of any given color. That dark grey header even becomes completely white.</p> <p>One interesting thing is if I go and manually change the fill color of one of those cells in Excel, then copy and paste that, the color I manually set is copied over perfectly while the Infragistics generated cells are dithered.</p> <p>This only occurs when copying between Excel files, not between Worksheets within an Excel document. Has anyone ran into this issue, or do any Excel experts know what could cause this from a technical point of view?</p> <p>This is Excel 2007, and Infragistics Build 8.2.20082.1000.</p>
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    1. USMike Christensen
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    1. COI've had nightmares when I created colors via macro in Excel. My personal hell was when I would save them and send them to another person, they would appear as different colors when they loaded them. I don't have an answer, but I would suspect Excel just as much as your 3rd party add-in. It's been a while since I did it, but I seem to recall better success using the vb constants over RGB colors.
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      1. USPerry Tew
    2. CO@PerryTew - Yup, using like `Color.Wheat` instead of `Color.FromArgb()` makes no difference. I wouldn't expect it to, unless Excel happened to use the same color constants as the .NET Framework. I bet everything just gets converted into RGB in the generated file since the Infragistics control would have no way to know if you used a color constant or RGB value in code.
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      1. USMike Christensen
    3. CODoes this also happen if you set colors manually instead of with VBA code ?
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