如何把放入PictureBOX的图片，通过鼠标可以进行放大，缩小，平移功能

Question

如题，最好能提供源码，高手们请进！

Answer 1

picturebox Drawing ;
添加   private void Drawing_MouseWheel(object sender, MouseEventArgs e)
{
double scale = 1;
            if (Drawing.Height > 0)
            {
                scale = (double)Drawing.Width / (double)Drawing.Height;
            }
            if ((Drawing.Width > 200) && (e.Delta < 0))
            {
                Drawing.Width += (int)(e.Delta * scale);
                Drawing.Height += e.Delta;
               
            }
            else if ((Drawing.Width < 1080) && (e.Delta>0))
            {
                Drawing.Width += (int)(e.Delta * scale);
                Drawing.Height += e.Delta;            }
}

Answer 2

private void Drawing_MouseWheel(object sender, MouseEventArgs e) 
{ 
double scale = 1; 
            if (Drawing.Height > 0) 
            { 
                scale = (double)Drawing.Width / (double)Drawing.Height; 
            } 
            if ((Drawing.Width > 200) && (e.Delta < 0)) 
            { 
                Drawing.Width += (int)(e.Delta * scale); 
                Drawing.Height += e.Delta; 
              
            } 
            else if ((Drawing.Width < 1080) && (e.Delta>0)) 
            { 
                Drawing.Width += (int)(e.Delta * scale); 
                Drawing.Height += e.Delta;             } 
}

Answer 3

MouseWheel 怎么没有看到，我是VS2005

Answer 4

            pictureBox1.Location = new Point(pictureBox1.Location.X - 5, pictureBox1.Location.Y - 5);
            pictureBox1.Size = new Size(pictureBox1.Size.Width + 5, pictureBox1.Size.Height + 5);写到某个事件中估计能用吧

Answer 5

MouseWheel事件好象屏蔽了，即使写出来，怎么好象也没用呢

Answer 6

this.Drawing.MouseWheel += new System.Windows.Forms.MouseEventHandler(this.Drawing_MouseWheel);
自己添加，VS2005

Answer 7

托一个contextMenuStrip 空件，连到pictureBox的contextMenuStrip属性。  private void zoomInToolStripMenuItem_Click(object sender, EventArgs e)
        {
           int h = pictureBox1.Height;
           int w= pictureBox1.Width ;
           h = h * 2; w = w * 2;
           pictureBox1.Height = h;
           pictureBox1.Width = w;
        }