Winforms中的多色对角渐变 [英] Multi-color diagonal gradient in winforms

问题描述

我试图在Winforms中用多色对角渐变填充矩形，如下例所示:

I am trying to fill a rectangle with a multi-color diagonal gradient in winforms that looks like the following example: diagonal gradient I know this is a WPF example, but is it possible to get similar results in winforms?

推荐答案

以下是为您提供的一个小示例

Here is a little example for you

void MainFormPaint(object sender, PaintEventArgs e)
{
  LinearGradientBrush br = new LinearGradientBrush(this.ClientRectangle, Color.Black, Color.Black, 0 , false);
  ColorBlend cb = new ColorBlend();
  cb.Positions = new[] {0, 1/6f, 2/6f, 3/6f, 4/6f, 5/6f, 1};
  cb.Colors = new[] {Color.Red, Color.Orange, Color.Yellow, Color.Green, Color.Blue, Color.Indigo, Color.Violet};
  br.InterpolationColors= cb;
  // rotate
  br.RotateTransform(45);
  // paint
  e.Graphics.FillRectangle(br, this.ClientRectangle);
}

这是结果

希望这会有所帮助

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