/// <summary>
/// 使用指定的渐变色和方向填充一个矩形 Fills the rectagle with gradient colors
/// </summary>
/// <param name="gx">Destination graphics</param>
/// <param name="rc">Desctination rectangle</param>
/// <param name="startColorValue">Starting color for gradient</param>
/// <param name="endColorValue">End color for gradient</param>
/// <param name="fillDirection">The direction of the gradient</param>
public static void FillGradientRectangle(this Graphics gx, Rectangle rc, Color startColorValue, Color endColorValue, FillDirection fillDirection)
{
GradientFill.Fill(
gx,
rc,
startColorValue,
endColorValue,
fillDirection);
}
/// <summary>
/// 返回指定渐变色和方向的填充矩形
/// </summary>
/// <param name="rc">Destination rectangle</param>
/// <param name="startColorValue">Starting color for gradient</param>
/// <param name="endColorValue">End color for gradient</param>
/// <param name="fillDirection">The direction of the gradient</param>
/// <returns>Image of the rectanle</returns>
public static Bitmap GetGradientRectangle(Rectangle rc, Color startColorValue, Color endColorValue, FillDirection fillDirection)
{
Bitmap outputImage = new Bitmap(rc.Width, rc.Height);
// Create temporary graphics
Graphics gx = Graphics.FromImage(outputImage);
GradientFill.Fill(
gx,
rc,
startColorValue,
endColorValue,
fillDirection);
return(outputImage);
}