最近在做一個項目，點選mybutton2之後上面的flowlayoutpanel會出現圖片，之後打勾，被勾選的圖片會加入下方flowlayoutpanel裡，外觀如下

這是我button裡的程式碼

 List<PhotoDataItem> photolist = PhotoDataSource.Search(SearchTerm: "Microsoft",results:3);
            this.dataGridView1.DataSource = photolist;

            for (int i = 0; i <= photolist.Count - 1; i++)
            {
                MyItemTemplate x = new MyItemTemplate();
                x.Desc = photolist[i].Title;
                x.ImageURL = photolist[i].ImagePath;

                this.flowLayoutPanel3.Controls.Add(x);
                Application.DoEvents();
            }

這是我MyItemTemplate類別裡的程式碼

 public string Desc
        {
            set
            {
                label1.Text = value;
            }

        }
        public byte[] ImageBytes
        {
            set
            {
                System.IO.MemoryStream ms = new System.IO.MemoryStream(value);
                this.pictureBox1.Image = Image.FromStream(ms);
            }
        }

        public string ImageURL
        {
            set
            {
                this.pictureBox1.Load(value);
            }
        }

        public MyItemTemplate()
        {
            InitializeComponent();
            this.pictureBox1.MouseEnter += PictureBox1_MouseEnter;
            this.pictureBox1.MouseLeave += PictureBox1_MouseLeave;
            this.pictureBox1.MouseClick += PictureBox1_MouseClick;
           
        }

        private void PictureBox1_MouseClick(object sender, MouseEventArgs e)
        {
            if (checkBox1.Checked)
            {
               
            }
        }

        private void label1_Click(object sender, EventArgs e)
        {
            
        }

        private void PictureBox1_MouseLeave(object sender, EventArgs e)
        {
            this.pictureBox1.BackColor = Color.Gray;
            this.pictureBox1.Width -= 8;
            this.pictureBox1.Height -= 8;
        }

        private void PictureBox1_MouseEnter(object sender, EventArgs e)
        {
            this.pictureBox1.BackColor = Color.Red;
            this.pictureBox1.Width += 8;
            this.pictureBox1.Height += 8;         
           
        }

我目前想到是用mouseclick這個事件並在裡面用checkbox.check來判斷有無勾選
我在裡面加個messagebox.show("有選到");這段有出現有選到這三個字，我想我沒想錯
那請問我該怎麼打才能把他加入到flowlayoutpanel裡?