TableLayoutPanel不显示我的pictureBoxes

Question

我想获取当前演示文稿的所有PowerPoint幻灯片，并将它们与图片框一起添加到我的表格布局面板中，但我的图片框由于某种原因不会显示。

public partial class PPT_GUI : Form
{
    public PPT_GUI(PowerPoint.Slides Sld)
    {
        InitializeComponent();
        int rowCount = 1;
        PictureBox[] Box;
        Box = new PictureBox[Sld.Count];

        for (int i = 0; i < Sld.Count; i++)
        {
            Sld[i+1].Copy();
            Box[i] = new PictureBox();
            Box[i].Width = 90;
            Box[i].Height = 90;
            Box[i].SizeMode = PictureBoxSizeMode.StretchImage;
            Box[i].BorderStyle = BorderStyle.FixedSingle;
            Box[i].BringToFront();

            tableLayoutPanel1.Controls.Add(Box[i], i%3, rowCount );

            if (i % 3 == 0)
            {
                tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 360F));
                rowCount++;
            }              

            if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Bitmap))
            {
                ImageSource imgSource = BinaryStructConverter.ImageFromClipboardDib();
                Box[i].Image = ImageWpfToGDI(imgSource);
            }
        }
    }
}