winfrom PictureBox控件实现图片放大功能

1、写入放大方法

public  void Bigimage(object sender) {
            PictureBox pictureBox = (PictureBox)sender;
            // 检查是否有图片
            if (pictureBox.Image == null)
                return;
            // 创建新的窗口用于显示放大后的图片
            Form form = new Form();
            form.StartPosition = FormStartPosition.CenterParent;
            form.Size = new Size(pictureBox.Image.Width * 2, pictureBox.Image.Height * 2);
            form.Text = "放大的图片";
            // 在新窗口中创建一个PictureBox控件，并设置其Image为放大后的图片
            PictureBox zoomPictureBox = new PictureBox();
            zoomPictureBox.Dock = DockStyle.Fill;
            zoomPictureBox.SizeMode = PictureBoxSizeMode.Zoom;
            zoomPictureBox.Image = pictureBox.Image;
            // 将放大的PictureBox控件添加到新窗口中
            form.Controls.Add(zoomPictureBox);
            // 显示新窗口
            form.ShowDialog();
        }

2、在PictureBox控件中使用双击事件DoubleClick，调用双击放大方法传入sender参数

 private void pictureBox1_DoubleClick(object sender, EventArgs e)
        {
            Bigimage(sender);
        }