Color::R Property
Gets the red component value of this Color structure.
Assembly: System.Drawing (in System.Drawing.dll)
The color of each pixel is represented as a 32-bit number: 8 bits each for alpha, red, green, and blue (ARGB). Each of the four components is a number from 0 through 255, with 0 representing no intensity and 255 representing full intensity. Likewise,
R is a value from 0 to 255 with 0 representing no red and 255 representing fully red.
The following code example demonstrates the A, R, G, and B properties of a Color, and the Implicit member.
This example is designed to be used with a Windows Form. Paste the code into the form and call the ShowPropertiesOfSlateBlue method from the form's Paint event-handling method, passing e as PaintEventArgs.
void ShowPropertiesOfSlateBlue( PaintEventArgs^ e ) { Color slateBlue = Color::FromName( "SlateBlue" ); Byte g = slateBlue.G; Byte b = slateBlue.B; Byte r = slateBlue.R; Byte a = slateBlue.A; array<Object^>^temp0 = {a,r,g,b}; String^ text = String::Format( "Slate Blue has these ARGB values: Alpha:{0}, " "red:{1}, green: {2}, blue {3}", temp0 ); e->Graphics->DrawString( text, gcnew System::Drawing::Font( this->Font,FontStyle::Italic ), gcnew SolidBrush( slateBlue ), RectangleF(PointF(0.0F,0.0F),this->Size) ); }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.