private void Form1_LocationChanged(object sender, EventArgs e)
 {
     if (listView1.SelectedItems.Count > 0)
     {
         if (frm2 != null)
         {
             frm2.Close();
         }
         frm2 = new Frm_Browser();
         string path = listView1.SelectedItems[0].SubItems[1].Text;
         int    x    = this.Location.X;
         int    y    = this.Location.Y;
         frm2.x = x + this.Width;
         frm2.y = y;
         frm2.pictureBox1.Image = Image.FromFile(path);
         frm2.Show();
         this.Focus();
     }
     else
     {
         if (frm2 != null)
         {
             frm2.Close();
         }
         frm2 = new Frm_Browser();
         int x = this.Location.X;
         int y = this.Location.Y;
         frm2.x = x + this.Width;
         frm2.y = y;
         frm2.Hide();
         this.Focus();
     }
 }
        private void Form1_Load(object sender, EventArgs e)
        {
            int x = this.Location.X;
            int y = this.Location.Y;

            frm2   = new Frm_Browser();
            frm2.x = x + this.Width;
            frm2.y = y;
            frm2.Hide();
            openFileDialog1.Filter = "支持的图片格式|*.jpeg;*.png;*.bmp;*.jpg";
        }