极度郁闷 没分了希望大家谅解 高手帮看看

Question

       pictureBox1.MouseWheel += new MouseEventHandler(pictureBox1_MouseWheel);
       public void pictureBox1_MouseWheel(object sender, MouseEventArgs e)
        {
            MessageBox.Show(e.Delta.ToString());
        }为什么 滚动滑轮啥反映也没有啊

Answer 1

        private void pictureBox1_Click(object sender, EventArgs e)
        {
            pictureBox1.Focus();
        }
因为PictureBox没有焦点，加上这个

Answer 2

http://www.cnblogs.com/FrameWork/articles/557630.html

Answer 3

那怎么去在滚动时去放大呢 我光取到这个数字 怎么去写代码呢。lovelan1748

Answer 4

private System.Drawing.Bitmap NewBitmap;
NewBitmap = new Bitmap(pictureBox1.Image, Width, Height);