C# WinForm实现窗体渐变色效果的方法步骤

public static System.Drawing.Color FromArgb (int red, int green, int blue);

Color color1 = new Color();
for(int i=0;i<=255;i++)
{
    color1.FromArgb(1,i,100);
}

Color color1 = new Color();
for(int i=0;i<=255;i++)
{
    color1.FromArgb(1,i,100);
    SolidBrush SBrush = new SolidBrush(color);//实例化一个单色画笔类对象SBrush
}

Color color1 = new Color();
for(int i=0;i<=255;i++)
{
    color1.FromArgb(1,i,100);
    SolidBrush SBrush = new SolidBrush(color);//实例化一个单色画笔类对象SBrush
    Pen pen = new Pen(SBrush, 1);//实例化一个用于绘制直线和曲线的对象pen
}

protected override void OnPaintBackground(PaintEventArgs e)
{
    int intLocation, intHeight;//定义两个int型的变量intLocation、intHeight 
    intLocation = this.ClientRectangle.Location.Y;//为变量intLocation赋值
    intHeight = this.ClientRectangle.Height / 200;//为变量intHeight赋值
    for (int i =255; i >= 0; i--)
    {
        Color color = new Color();//定义一个Color类型的实例color
        //为实例color赋值
        color = Color.FromArgb(1, i, 100);
        SolidBrush SBrush = new SolidBrush(color);//实例化一个单色画笔类对象SBrush
        Pen pen = new Pen(SBrush, 1);//实例化一个用于绘制直线和曲线的对象pen
        e.Graphics.DrawRectangle(pen, this.ClientRectangle.X, intLocation, this.Width, intLocation + intHeight);//绘制图形
        intLocation = intLocation + intHeight;//重新为变量intLocation赋值
    }
}