C＃我該如何移動一個帶有鼠標的圖片盒

Question

我嘗試在c＃中做一個程序，你試着裝飾一棵聖誕樹，我想用鼠標選擇全球並放在聖誕樹上。我可以做到這一點，但只爲一個picturebox，當我編寫第二個picturebox的代碼後，我運行全球移動中的程序。 這是我的代碼。如何解決這個問題？
P.S. picturebox1和2是地球儀，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

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

順便說一句，我看到這兩個PictureBoxes處理程序是相同的。爲什麼不對所有PictureBox使用相同的處理程序，並通過sender參數獲取當前的PictureBox？