PictureBox问题

Question

我有个问题:

我有3个图片框,有3个不同的图像,如图像

我可以设置为pictureBox3所以两个图像看起来相同.....

编辑: 我想在pictureBox2上移动pictureBox3,

因此没有选项将它们合并到单个图像

Answer 1

确保图像pictureBox3是透明的.将其设置BackColor为透明.在代码中,设置Parent的属性pictureBox3是pictureBox2.调整Location坐标,pictureBox3因为它们将相对于pictureBox2您更改后的坐标Parent.

    private void Form1_Load(object sender, EventArgs e)
    {
        pictureBox3.Parent = pictureBox2;
        pictureBox3.Location =
            new Point(
                pictureBox3.Location.X
                - pictureBox2.Location.X,
                pictureBox3.Location.Y
                - pictureBox2.Location.Y);

    }

在设计师中你不会看到透明度,但在运行时你会看到.

更新

在图像中,左侧显示设计器视图,右侧是运行时版本.

另一个更新

我真的不明白这对你有什么用.我想必须有一些我们正在做的事情.我将描述创建工作样本的确切步骤.如果你按照完全相同的步骤,我想知道我们是否会得到相同的结果.接下来的步骤描述了要做什么,并使用我在网上找到的两个图像.

• 使用Visual Studio 2008,使用模板Windows窗体应用程序创建一个新项目.确保该项目针对.NET Framework 3.5.
• 将表单的大小设置为457; 483.
• 将PictureBox控件拖到窗体上.将其位置设置为0; 0并将其大小设置为449; 449.
• 单击图像属性旁边的省略号,单击导入...按钮并导入图像http://a.dryicons.com/files/graphics_previews/retro_blue_background.jpg(只需在文件名文本框中键入URL,然后单击打开).然后单击"确定"以使用该图像.
• 将另一个PictureBox拖到窗体上,将其Location设置为0; 0,将其Size设置为256; 256.还将其BackColor属性设置为Transparent.
• 使用与上述相同的方法,导入图像http://www.axdn.com/redist/axiw_i.png,这是一个透明图像.

• 现在将以下代码放在窗体的OnLoad事件处理程序中:

  private void Form1_Load(object sender, EventArgs e)
  {
      pictureBox2.Parent = pictureBox1;
  }
  

而已!如果我运行这个程序,我会在另一个图像上面得到一个透明图像.

Answer 2

我将添加另一个示例,根据更新的要求允许移动image3.
为了使其工作,将透明图像放入其中.Resources\transp.png
这对所有三个图像使用相同的图像,但您可以简单地将transparentImg替换为image1,将image2替换为合适的图像.

演示开始后,可以在表单周围拖放中间图像.

public partial class Form1 : Form
{
    private readonly Image transparentImg; // The transparent image
    private bool isMoving = false;         // true while dragging the image
    private Point movingPicturePosition = new Point(80, 20);   // the position of the moving image
    private Point offset;   // mouse position inside the moving image while dragging
    public Form1()
    {
        InitializeComponent();

        // 
        // pictureBox1
        // 
        this.pictureBox1.Location = new System.Drawing.Point(0, 0);
        this.pictureBox1.Name = "pictureBox1";
        this.pictureBox1.Size = new System.Drawing.Size(231, 235);
        this.pictureBox1.TabIndex = 0;
        this.pictureBox1.TabStop = false;
        this.pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);
        this.pictureBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseDown);
        this.pictureBox1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseMove);
        this.pictureBox1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseUp);
        this.Controls.Add(this.pictureBox1);
        transparentImg = Image.FromFile("..\\..\\Resources\\transp.png");
    }

    private void pictureBox1_Paint(object sender, PaintEventArgs e)
    {
        var g = e.Graphics;
        g.DrawImageUnscaled(transparentImg, new Point(20, 20));      // image1
        g.DrawImageUnscaled(transparentImg, new Point(140, 20));     // image2
        g.DrawImageUnscaled(transparentImg, movingPicturePosition);  // image3
    }

    private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
    {
        var r = new Rectangle(movingPicturePosition, transparentImg.Size);
        if (r.Contains(e.Location))
        {
            isMoving = true;
            offset = new Point(movingPicturePosition.X - e.X, movingPicturePosition.Y - e.Y);
        }
    }

    private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
    {
        if (isMoving)
        {
            movingPicturePosition = e.Location;
            movingPicturePosition.Offset(offset);
            pictureBox1.Invalidate();
        }
    }

    private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
    {
        isMoving = false;
    }
}