topic Re: how to get the properties object color in c# in .NET Forum

how to get the properties object color in c#

Anonymous — Sat, 03 Dec 2016 03:43:37 GMT

Hi all, I am trying to retrieve the object color in RGB or TrueColor Mode. I have try to get the data with the following code, but the cecolor return in string but not TrueColor. Anyone have idea how to do this? Thanks

acAppComObj = (AutoCAD.AcadApplication)Marshal.GetActiveObject("AutoCAD.Application");
string cecolor = acDocComObj.GetVariable("CECOLOR");

Re: how to get the properties object color in c#

BKSpurgeon — Sat, 03 Dec 2016 14:22:14 GMT

this might be of help:

Database db1 = Application.DocumentManager.MdiActiveDocument.Database;
Autodesk.AutoCAD.Colors.Color colorOfDB = db.Cecolor;

It's not .net but it should help with your solution:

http://adndevblog.typepad.com/autocad/2012/05/color-translation-between-rgb-and-autocad-aci-using-objectarx.html

or you can use the following properties to get the bytes to convert to any color structure you wish :

colorOfDB.Blue 
colorOfDB.Red
colorOfDB.Green

Re: how to get the properties object color in c#

Anonymous — Sun, 04 Dec 2016 09:16:38 GMT

Thanks for the reply. However I am not sure whether this code is work, because I am currently develop an interop code but this code seem like work at in-process code.

Re: how to get the properties object color in c#

Anonymous — Sun, 04 Dec 2016 09:19:37 GMT

Thanks for the reply. However I am not sure whether this code is work, because I am currently develop an interop code but this code seem like work at in-process code.

Re: how to get the properties object color in c#

Alexander.Rivilis — Sun, 04 Dec 2016 12:43:32 GMT

For RGB color CECOLOR value is string like a "RGB:RRR,GGG,BBB". So you can get all RGB components from this string.

Re: how to get the properties object color in c#

Anonymous — Sun, 04 Dec 2016 13:04:14 GMT

Hi, Thanks Alexander. However, it maybe not always return the exact value like the format you wrote, if user select the color from color books, it will have format like "DIC COLOR GUIDE(R) PART II$DIC 2003".

p/s: Is there anywhere to convert these string to color index?

Re: how to get the properties object color in c#

Alexander.Rivilis — Sun, 04 Dec 2016 13:06:00 GMT

Maybe this link help you: https://knowledge.autodesk.com/search-result/caas/CloudHelp/cloudhelp/2016/ENU/AutoCAD-ActiveX/files/GUID-D24C6BB5-5F87-42E7-907F-F27226B330E3-htm.html

Re: how to get the properties object color in c#

Anonymous — Sun, 04 Dec 2016 13:52:39 GMT

Thanks again, however from what I read it just show the method of set the color to the object with the r g b value but I found no way to get the color value of the properties that preset in the AutoCad.

Re: how to get the properties object color in c#

_gile — Sun, 04 Dec 2016 17:58:31 GMT

Hi,

Here's a quick and dirty (not tested and no error handling)

        private AcadAcCmColor GetAcCmColor(string colorName)
        {
            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]);
            }
            return color;
        }

Re: how to get the properties object color in c#

Anonymous — Mon, 05 Dec 2016 04:07:41 GMT

Hi Sir Gile, your solution is awesome! Thanks for your help! It really solve my problem!