C＃如何使用鼠標移動圖片框

Question

我嘗試用c＃編寫一個程序，在其中嘗試裝飾聖誕樹，我想用鼠標摘地球並戴在聖誕樹上。 我可以執行此操作，但是在為第二個Picturebox編寫代碼並運行該程序后，地球僅以一個速度運動，僅對一個PictureBox即可。 這是我的代碼。 如何解決呢？
PS picturebox1和2是地球，而pb_brad是聖誕樹。

   public partial class Form1 : Form
{
    Point location = Point.Empty;
    public Form1()
    {
        InitializeComponent();
        pictureBox1.Parent = pb_brad;
        pictureBox1.BackColor = Color.Transparent;
        pictureBox2.Parent = pb_brad;
        pictureBox2.BackColor = Color.Transparent;

    }

    private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            location = new Point(e.X, e.Y);
        }
    }

    private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
    {
        if (location != Point.Empty)
        {
            Point newlocation = this.pictureBox1.Location;
            newlocation.X += e.X - location.X;
            newlocation.Y += e.Y - location.Y;
            this.pictureBox1.Location = newlocation;
        }
    }

    private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
    {
        location = Point.Empty;
    }

    private void pictureBox2_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            location = new Point(e.X, e.Y);
        }
    }

    private void pictureBox2_MouseMove(object sender, MouseEventArgs e)
    {
        if (location != Point.Empty)
        {
            Point newlocation = this.pictureBox1.Location;
            newlocation.X += e.X - location.X;
            newlocation.Y += e.Y - location.Y;
            this.pictureBox2.Location = newlocation;
        }
    }

    private void pictureBox2_MouseUp(object sender, MouseEventArgs e)
    {
        location = Point.Empty;
    }

}

Answer 1

我看到您正在pictureBox2的MouseMove事件處理程序中使用pictureBox1。

順便說一句，我看到兩個PictureBox的處理程序都相同。 為什么不對所有PictureBox使用相同的處理程序，並通過sender參數獲取當前的PictureBox？