system.drawing.color

来源： https://stackoverflow.com/questions/38907164/how-can-i-assign-a-color-to-a-font-in-epplus

问题 I'm developing a vsto addin for Excel, and I'm trying to change the color to the comments in Excel. This is the code that I have: Excel.Range activeCell = _application.ActiveCell; activeCell.AddComment("some text")); activeCell.Comment.Shape.Fill.BackColor = Color.Red; The exception I'm getting is: Cannot implicitly convert type 'System.Drawing.Color' to 'Microsoft.Office.Interop.Excel.ColorFormat' I cannot find how to make a conversion between the two formats. 回答1: One option is to use

问题 Has anyone written a nice extension method 'library' for System.Drawing.Color. Would be nice to say : Color.Red.AdjustBrightness(.5) Color.Red.AdjustAlpha(.5) Color.Red.ToHSV() or something like that. Alpha is easy, but others become time consuming because you have to go off and fine all the right mathematical equations for HSV and HSB and all that fun stuff. Hoping someone else had done the work already :-) Microsoft doesn't seem to want to do it for me. 回答1: CodeProject has some code for an

问题 Has anyone written a nice extension method 'library' for System.Drawing.Color. Would be nice to say : Color.Red.AdjustBrightness(.5) Color.Red.AdjustAlpha(.5) Color.Red.ToHSV() or something like that. Alpha is easy, but others become time consuming because you have to go off and fine all the right mathematical equations for HSV and HSB and all that fun stuff. Hoping someone else had done the work already :-) Microsoft doesn't seem to want to do it for me. 回答1: CodeProject has some code for an

问题 I'm developing a WinForm Printing application for our company. When the document is printed, I need to take the System.Drawing.Color property of each Control on the document and create a System.Drawing.Brush object to draw it. Is there a way to convert the System.Drawing.Color value to a System.Drawing.Brush value? NOTE: I've tried looking into the System.Windows.Media.SolidColorBrush() method, but it does not seem to be helpful. 回答1: Use the SolidBrush class: using (SolidBrush brush = new

问题 I'm developing a WinForm Printing application for our company. When the document is printed, I need to take the System.Drawing.Color property of each Control on the document and create a System.Drawing.Brush object to draw it. Is there a way to convert the System.Drawing.Color value to a System.Drawing.Brush value? NOTE: I've tried looking into the System.Windows.Media.SolidColorBrush() method, but it does not seem to be helpful. 回答1: Use the SolidBrush class: using (SolidBrush brush = new

问题 Using C# I was trying to develop the following two. The way I am doing it may have some problem and need your kind advice. In addition, I dont know whether there is any existing method to do the same. private static String HexConverter(System.Drawing.Color c) { String rtn = String.Empty; try { rtn = "#" + c.R.ToString("X2") + c.G.ToString("X2") + c.B.ToString("X2"); } catch (Exception ex) { //doing nothing } return rtn; } private static String RGBConverter(System.Drawing.Color c) { String rtn

问题 Using C# I was trying to develop the following two. The way I am doing it may have some problem and need your kind advice. In addition, I dont know whether there is any existing method to do the same. private static String HexConverter(System.Drawing.Color c) { String rtn = String.Empty; try { rtn = "#" + c.R.ToString("X2") + c.G.ToString("X2") + c.B.ToString("X2"); } catch (Exception ex) { //doing nothing } return rtn; } private static String RGBConverter(System.Drawing.Color c) { String rtn

问题 In my app I allow the user to build a color, and then show him the name or value of the color later on. If the user picks red (full red, not red-ish), I want to show him "red". If he picks some strange color, then the hex value would be just fine. Here's sample code that demonstrates the problem: static string GetName(int r, int g, int b) { Color c = Color.FromArgb(r, g, b); // Note that specifying a = 255 doesn't make a difference if (c.IsNamedColor) { return c.Name; } else { // return hex

问题 The sample code for this issue is largely self-explanatory, so: [Fact] private void Color_in_should_equal_color_out() { var bitmap = new Bitmap(128,128,PixelFormat.Format32bppArgb); var color = Color.FromArgb(30,60,90,120); using (var g = Graphics.FromImage(bitmap)) { g.Clear(color); } var result = bitmap.GetPixel(0,0); Assert.Equal(color, result); } In this instance I would expect the color of the background to be identical to the color I cleared it to. Instead I get this: Assert.Equal()