Table Creation Html Code Behind

My question is a combination of VB.Net creating html code..No Google links to pointless areticles in languages that are not VB.NET, please. If you cannot code it yourself, please don't reply because it's so annoying to ask a question then get pointless, timewasting links just so you can get your points score up.I have a table which has 3 columns - nothing special just simple but its's the row number I am having issues with. Will explain soon.There is a directory with jpg files in it and the number of jpg files increased yesterday by 67, today by 37. Because the picture files come with any filename I have created a Windows app that renames the new files taking the ending point of yesterdays number as the starting point for today..So, each row holds 3 jpg files therefore 67 jpg / 3 = rows (yesterday). First number today is 68. I type 68 into the app I created, enumberating & moving (renaming) the jpg ('hduyhdgu.jpg becomes 68.jpg, suhdos.jpg becomes 69.jpg and so on for each of the new jpgs in that directory. That is done by the simple FileInfo/DirectoryInfo classes. Whilst renaming the photos in numerical sequence it has to write the html in the following form: [code] My Questions are:

1) How to sort out the row numbers so they flow in groups of 3 correctly and not 70, 71, 72, 71, 72, 73, 74, 75..?

2) How to create the table in code that dynamically draws itself with 3 columns (200px each done by CSS) wide and enough rown to hold every jpg in that directory? So, if I moved 5000 jpgs in that directory tomorrow the code will loop through and create the html.

3) If creating the table dynamically as in Q2 above how would I fix the place to draw it? Placeholder? A div is easy (<div 'id="MyTable" runat="server"></div>. In code behind: MyTable.InnerText=.../MyTable.InnerHtml=...) but is it the best idea? [code]