设置System.Drawing.Color值
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您好如何在
System.Drawing.Color.G
R G B
System.Drawing.Color.G=255;
Property or indexer \'System.Drawing.Color.G\' cannot be assigned toit is read only
R G B
Color
没有找到相关结果
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6 个回复
届甸衬丝蚕
您还可以使用以下重载指定Alpha。功飘
结构是不变的（因为所有结构都应该如此），这意味着一旦创建了特定实例，就无法更改其属性值。 相反，您需要使用所需的属性值创建结构的新实例。由于要使用其分量RGB值创建颜色，因此需要使用方法：疾很毋悲
物崎巩
static class ColorExtension { public static Color ChangeG(Color this color,byte g) { return Color.FromArgb(color.A,color.R,g,color.B); } }痴浪墨
邪罗逢确胃
using System; using System.Drawing; public struct MyColor { private byte a, r, g, b; public byte A { get { return this.a; } } public byte R { get { return this.r; } } public byte G { get { return this.g; } } public byte B { get { return this.b; } } public MyColor SetAlpha(byte value) { this.a = value; return this; } public MyColor SetRed(byte value) { this.r = value; return this; } public MyColor SetGreen(byte value) { this.g = value; return this; } public MyColor SetBlue(byte value) { this.b = value; return this; } public int ToArgb() { return (int)(A << 24) || (int)(R << 16) || (int)(G << 8) || (int)(B); } public override string ToString () { return string.Format (\"[MyColor: A={0}, R={1}, G={2}, B={3}]\", A, R, G, B); } public static MyColor FromArgb(byte alpha, byte red, byte green, byte blue) { return new MyColor().SetAlpha(alpha).SetRed(red).SetGreen(green).SetBlue(blue); } public static MyColor FromArgb(byte red, byte green, byte blue) { return MyColor.FromArgb(255, red, green, blue); } public static MyColor FromArgb(byte alpha, MyColor baseColor) { return MyColor.FromArgb(alpha, baseColor.R, baseColor.G, baseColor.B); } public static MyColor FromArgb(int argb) { return MyColor.FromArgb(argb & 255, (argb >> 8) & 255, (argb >> 16) & 255, (argb >> 24) & 255); } public static implicit operator Color(MyColor myColor) { return Color.FromArgb(myColor.ToArgb()); } public static implicit operator MyColor(Color color) { return MyColor.FromArgb(color.ToArgb()); } }