GDI绘制，效率很低，高手帮忙提供好的解决办法啊，，

Question

GDI绘制，效率很低，高手帮忙提供好的解决办法啊，，

Answer 1

 Graphics gp = this.CreateGraphics();
    Rectangle rect=new Rectangle(30,40,400,200);
    LinearGradientBrush lb = new LinearGradientBrush(rect, Color.Red, Color.Green,LinearGradientMode.Horizontal);
    ColorBlend cb = new ColorBlend(4);
    Color[] colorArray=new Color[]{Color.Red,Color.Green,Color.Blue,Color.Yellow};
    float[] positionArray=new float[]{0f,0.33f,0.67f,1f};
    cb.Colors=colorArray;
    cb.Positions=positionArray;
    lb.InterpolationColors=cb;    
    gp.FillRectangle(lb,rect);
    gp.Dispose();
将此代码放在按钮的点击事件中看看