convert system.color to integer ? (C#)

[dynamic_sysop]

convert system.color to integer ?

 

hi does anyone know if it's possible to convert a colour to integer? i can put some code together and run my app , but when i click a button to test it, it errors.

i have managed to get it to show a value ( rgb i think ) like this :

           int c=Convert.ToInt32(Color.AliceBlue.ToArgb());
		MessageBox.Show(c.ToString());

but i want to be able to get the int value of the actuall colour not the rgb:-\

[dynamic_sysop]

s'ok i've sussed it:)

          int c=Convert.ToInt32(Color.Red.R.ToString());
		MessageBox.Show(c.ToString());
// gets the r value , g for the g value etc...

[aewarnick]

Not sure if this is the best way to do this but the string representation of ToArgb() is what you want.

ToArgb().ToString()

[aewarnick]

We posted at the same time. Here is one of my methods as an example:

public static int[] GetArgbValues(Color c)
{
int[]Argb= {(int)c.R, (int)c.G, (int)c.B};
return Argb;
}

 

As you can see, the Color.R ext. are bytes and can be implicitly converted to int. You don't need an explicit conversion.

[dynamic_sysop]

i seem to get an error with that, cannot convert int[] to int. so i tried messing with it a bit, but Argb seems to be returning something funny lol

System.Int32[] thats what Argb is showing as.

[aewarnick]

It does not return a Color.FromArgb. It returns an integer array with 3 elements. Three integer values that you can plug into a call to Color.FromArgb()

Ex:

 

Color g= Color.FromArgb(c[0], c[1], c[2]);

[dynamic_sysop]

ok if i elaberate a little with what i'm making maybe a suggestion on how to change the colours.

i have adapted my vb6 coding for changing progressbar colours ( front and back ) to C#

	[DllImport("User32.Dll")]
       public static extern int SendMessage(int hwnd,int wMsg,int wParam,int lParam);
       
	public const int PBM_SETBKCOLOR = 0x2001;
       public const int PBM_SETBARCOLOR = 0x409;

	private void button4_Click(object sender, System.EventArgs e)
	{
		int j=this.progressBar1.Handle.ToInt32();
		//get handle for progressbar
		SendMessage(j,PBM_SETBKCOLOR,0,10);
		//set backcolor of progressbar
		SendMessage(j,PBM_SETBARCOLOR,0,255);
		//set forecolor of progressbar
	}

in that case the 10 sets the backcolor to black , the 255 sets the forecolor to red.

i want to be able to allow a change of colour where the user can actually tell what colour they are setting rather than a number that means nothing to them.

[Volte]

Use the ColorTranslator.ToOle() function.

 

MessageBox.Show(ColorTranslator.ToOle(Color.FromArgb(255,255,0)).ToString());

 

shows

 

65535

[dynamic_sysop]

cheers volt :) that inspired me

using System.Runtime.InteropServices;
/// top of form ^^^
///
///
	[DllImport("User32.Dll")]
       public static extern int SendMessage(int hwnd,int wMsg,int wParam,int lParam);
       
	public const int PBM_SETBKCOLOR = 0x2001;
       public const int PBM_SETBARCOLOR = 0x409;
//// in design area ( below ) ^^^^
////
	public void SetProgressBackColor(Color c)
	{/// set the back color of the bar
       int a=Convert.ToInt32(c.R.ToString());
	int b=Convert.ToInt32(c.G.ToString());
	int d=Convert.ToInt32(c.B.ToString());
       int tot=Convert.ToInt32(ColorTranslator.ToOle(Color.FromArgb(a,b,d)).ToString());
	int j=this.progressBar1.Handle.ToInt32();
       SendMessage(j,PBM_SETBKCOLOR,0,tot);
	}

	public void SetProgressForeColor(Color c)
	{/// set the forecolor of the bar
		int a=Convert.ToInt32(c.R.ToString());
		int b=Convert.ToInt32(c.G.ToString());
		int d=Convert.ToInt32(c.B.ToString());
		int tot=Convert.ToInt32(ColorTranslator.ToOle(Color.FromArgb(a,b,d)).ToString());
		int j=this.progressBar1.Handle.ToInt32();
		SendMessage(j,PBM_SETBARCOLOR,0,tot);
	}
	private void button4_Click(object sender, System.EventArgs e)
	{
		SetProgressBackColor(System.Drawing.Color.BlueViolet);
           SetProgressForeColor(System.Drawing.Color.Red);
	}

:)

thanks again for the help.