Cast Object to a Color

[Cyclonit]

Hi,

I'm currently working on a function which reads an xml file and automatically checks whether the information in this file may be used or not. If it finds a row which cannot be used it will automatically replace this row by a default row which is hardcoded into the program.

My problem is, that I don't want to put the color codes as strings into my DataTable but convert them to actual Colors right away. This succeeds but when I try to cast the color out of the DataTable it fails and I don't see why because I have seen this in several examples.

The program does the following:
String -> Hex -> Color -> Save into DataTable -> Cast as Color

and the last step fails. Does anyone know why and how I can fix this?

best regards
Cyclonit

[adriancs]

show the code where the error occur

[Cyclonit]

I'm doing the following to write the color into the DataTable:

String colorHex = (String)fileRow.ItemArray[3];
colorHex = colorHex.TrimStart('#');
 
Int32 R = Int32.Parse(colorHex.Substring(0, 2), NumberStyles.AllowHexSpecifier);
Int32 G = Int32.Parse(colorHex.Substring(2, 2), NumberStyles.AllowHexSpecifier);
Int32 B = Int32.Parse(colorHex.Substring(4, 2), NumberStyles.AllowHexSpecifier);
 
Color color = Color.FromArgb(255, R, G, B);
Object colorObj = color;
 
tempDesign.Rows.Add((String)fileRow.ItemArray[0], (String)fileRow.ItemArray[1], (String)fileRow.ItemArray[2], colorObj);

When I check how the entry looks like in the DataTable (via "run to cursor") VisualStudio shows it like this:

colorObj = "{Name=ffff00aa, ARGB=(255, 255, 0, 170)}"

My code to extract it (not final, just for debugging) is:

Object colorObj = SMDesign.Design.Rows[0].ItemArray[3];
Color color = (Color)colorObj;

And VisualStudio shows the object this way:

colorObj = "Color [A=255, R=255, G=0, B=170]"

[adriancs]

well, I have tried storing and retrieving color value in and from a DataTable with the following code:

DataTable dt = new DataTable();
dt.Columns.Add("color", typeof(Color));
dt.Rows.Add(Color.FromArgb(255,123,132,132));
dt.Rows.Add(Color.Red);
dt.Rows.Add(Color.FromName("yellow"));
Color a = (Color)dt.Rows[0][0];
Color b = (Color)dt.Rows[1][0];
Color c = (Color)dt.Rows[2][0];

Is this solve your problem?

[Cyclonit]

Yes thank you very much.

[adriancs]

Hi, you are welcome. perhaps, you may consider to mark "choose as best answer button" on the most appropriate post that has solved your problems. :-)