Autocad Developer: how to get Object Color in RGB mode by using C#

Question

Hi All, I would like to get the Object Color in Properties in RGB Mode. I have try the code like string cecolor = acDocComObj.GetVariable("CECOLOR"); but this does not return the in TrueColor. Anyone got idea on how to do it?

Answer 1

For any Entity in AutoCAD (eg line, circle, block, etc), you can use the .Color property (for .NET in-process API):

Entity ent = // get the entity here;
Autodesk.AutoCAD.Colors.Color c = ent.Color;
int[] rgb = new int[] { c.Red, c.Green, c.Blue };

As you mentioned out-of-process COM/ActiveX, you can try something similar:

AcadEntity ent = // get the entity here;
int[] rgb = new int[] { ent.TrueColor.Red, ent.TrueColor.Green, ent.TrueColor.Blue };

Answer 2

The reply I gave on Autodesk discussion group.

        AcadAcCmColor color = new AcadAcCmColor();
        int index = 0;
        if (colorName.ToUpper() == "BYBLOCK")
        {
            color.ColorIndex = AcColor.acByBlock;
        }
        else if (colorName.ToUpper() == "BYLAYER")
        {
            color.ColorIndex = AcColor.acByLayer;
        }
        else if (int.TryParse(colorName, out index))
        {
            color.ColorIndex = (AcColor)index;
        }
        else if (colorName.ToUpper().StartsWith("RGB:"))
        {
            string[] rgb = colorName.Substring(4).Split(',');
            color.SetRGB(int.Parse(rgb[0]), int.Parse(rgb[1]), int.Parse(rgb[2]));
        }
        else
        {
            string[] bookColor = colorName.Split('$');
            color.SetColorBookColor(bookColor[0], bookColor[1]);
        }