小编Nej*_*man的帖子

可能重复:
随机数生成器仅生成一个随机数

一个初学者的问题.我有一个非常简单的程序,它绘制一条线,我想随机化位置,但每次我创建一个新的Random实例时,它返回相同的值.问题出在哪儿？谢谢.

private void Draw()
{
    Random random1 = new Random();
    int randomNumber1 = random1.Next(0, 300);
    Random random2 = new Random();
    int randomNumber2 = random2.Next(0, 300);
    Random random3 = new Random();
    int randomNumber3 = random3.Next(0, 300);
    Random random4 = new Random();
    int randomNumber4 = random4.Next(0, 300);
    System.Drawing.Graphics g = this.CreateGraphics();
    Pen green = new Pen(Color.Green, 5);
    g.DrawLine(green, new Point(randomNumber1, randomNumber2), 
                      new Point(randomNumber3, randomNumber4));
}

private void btndraw1_Click(object sender, EventArgs e)
{
    Draw();
}