c# - How to convert System.Drawing.Color to Microsoft Interop WdColorIndex

Question

How can I convert System.Drawing.Color to Microsoft.Office.Interop.Word.WdColorIndex?

I have done the code so far, but it's showing the error "overflow".

Here is the code which I have done

Color bgcolor = Color.FromArgb(Convert.ToInt32(innerText));
Microsoft.Office.Interop.Word.WdColorIndex wbgc = (Microsoft.Office.Interop.Word.WdColorIndex)(bgcolor.R + 0x100 * bgcolor.G + 0x10000 * bgcolor.B);
doc.Range(iRangeStart, iRangeEnd).HighlightColorIndex = wbgc;

How can I achieve this?

Answer 1

WdColorIndex is an enumeration, not an object that defines a color system. This means that the value you can assign is limited by the enumeration elements, e.g. wdBlack or wdBlue and their underlying integer values.

The technique you are using is to be applied to a WdColor object instead of a WdColorIndex enumeration:

var wordColor = (Microsoft.Office.Interop.Word.WdColor)(bgcolor.R + 0x100 * bgcolor.G + 0x10000 * bgcolor.B);

Highlighting in a Word document is limited to a number of colors, as defined in the WdColorIndex enumeration. Therefore, you cannot simply convert any color to a Word color for highlighting. You have to pick one of the available values. See MSDN for WdColorIndex for possible values.