超级简单的分屏控件【自定义PictureBox 继承于UserControl】

　　暑假前的一段时间，老师让做一个基于Socket的监控系统，其中有一项要求是可以分屏同时查看多台C的屏幕画面，由于基础不好，写这个分屏的控件也想了半天，不过总算是弄出来了，嘿嘿…

public partial class PictureControl : UserControl
    {
        public event MouseEventHandler PicControl_DoubleClick;
       
        private int picNum;
        /// <summary>
        /// 屏幕个数
        /// </summary>
        public int PicNum
        {
            get { return picNum; }
            set
            {
                if (value == 4 || value == 6 || value == 9 || value == 12 || value == 16 || value == 20 || value == 25)//只能

是4、6、9、12、16、20、25
                {
                    picNum = value;
                    this.SetPictureBox(this.picNum);
                }
                else
                {
                    this.PicNum = 12;
                    this.SetPictureBox(this.picNum);
                }
            }
        }

        public PictureControl()
        {
            this.picNum = 4;
            InitializeComponent();
            this.SetPictureBox(this.picNum);
        }

        /// <summary>
        /// 根据个数布局PictureBox
        /// </summary>
        /// <param name="num"></param>
        private void SetPictureBox(int num)
        {
            this.Controls.Clear();
            Size size = this.Size;
            switch (num)
            {
                case 4: this.SetPictureBox(2, 2, size); break;
                case 6: this.SetPictureBox(2, 3, size); break;
                case 9: this.SetPictureBox(3, 3, size); break;
                case 12: this.SetPictureBox(3, 4, size); break;
                case 16: this.SetPictureBox(4, 4, size); break;
                case 20: this.SetPictureBox(4, 5, size); break;
                case 25: this.SetPictureBox(5, 5, size); break;
            }
        }

        /// <summary>
        /// 布局pictureBox
        /// </summary>
        /// <param name="x">几行</param>
        /// <param name="y">几列</param>
        /// <param name="size">当前控件的大小</param>
        private void SetPictureBox(int x, int y,Size size)
        {
            int num = 0;
            for (int i = 0; i < x; i++)
            {
                for (int j = 0; j < y; j++)
                {
                    PictureBox pic = new PictureBox();
                    pic.SizeMode = PictureBoxSizeMode.Zoom;                                         //设置自动缩放
                    pic.BackColor = Color.White;                                                    //设置背景颜色
                    pic.Location = new Point((size.Width / y) * j, (size.Height / x) * i);          //设置Location
                    pic.BorderStyle = BorderStyle.FixedSingle;                                      //设置边框
                    pic.MouseDoubleClick += new MouseEventHandler(pic_MouseDoubleClick);            //订阅控件双击事件
                    pic.Size = new Size(size.Width / y, size.Height / x);                           //设置控件大小    
                    pic.Tag = num;                                                                  //设定控件编号即屏幕序号
                    this.Controls.Add(pic);                                                         //添加
                    num++;
                }
            }
        }

        void pic_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (this.PicControl_DoubleClick != null)
            {
                this.PicControl_DoubleClick(sender, e);//将动态添加的控件的双击事件 传向控件体外。
            }
        }

        private void PictureControl_SizeChanged(object sender, EventArgs e)
        {
            this.SetPictureBox(this.picNum);
        }

        private PictureBox GetPicByIndex(int index)
        {
            foreach (Control c in this.Controls)
            {
                if (Convert.ToInt32(c.Tag) == index)
                {
                    return (PictureBox)c;
                }
            }
            PictureBox p = new PictureBox();
            p.Tag = -1;
            return p;
        }

        /// <summary>
        /// 根据屏幕序号设置图像
        /// </summary>
        /// <param name="index">屏幕号</param>
        /// <param name="img">图像</param>
        public void SetImageByIndex(int index, Image img)
        {
            GetPicByIndex(index).Image = img;
        }
    }