int tdcount = 0;
         //get the count of table cells in tr
          tdcount = tr1.Controls.Count;
          //Create a new table cell
          HtmlTableCell tdcell = new HtmlTableCell();
          //Create a new image control
          Image img = new Image();
         //set the url for image
          img.ImageUrl = "C:\img.jpg";
          img.Width = 120; //set the image width
          img.Height = 100; //set the image hight
          tdcell.ColSpan = 3; //set the colspan for table cell
          tdcell.RowSpan = 4; //set the rowspan for table cell
          tdcell.Controls.Add(img); // place image in table cell
          tr1.Controls.AddAt(tdcount, tdcell); // Add table cell to the table row.