Forms Data Controls :: Accessing Values From A Database With Datalist?

I have a datalist and I am filling it using a dataadapter, dataset. So in my .ascx page, I have

<asp:datalist runat="server" id="dlProducts" repeatcolumns="2" repeatdirection="horizontal">
<itemtemplate>
<table border="0">
<tr><td><%# Eval("Item_Name") %></td></tr>
<tr><td>I have to add a picture here</td><td><%# Eval("First_Name") %></td></tr>
</table>
</itemtemplate>
</asp:datalist>

In the area where I have put a statement like "I have to add a picture here", I have write a big case statement. Like:

Case: 6 // show a picture from file1
case: 7 // show a picture from file2
Case 8: //show a picture from file3

So How do I do this here? Because I dont know how to access the datalist values from code behind.

Here is my code behind:

SQLString = "SELECT First_Name, Picture, item_name, item_id from table1 where item_id = " + request.querystring["iid"];
dataadapter daItems = new dataadapter(SQLString, "connection_name");
dataset dsItems = new dataset();
daItems.fill(dsItems);
dlProducts.datasource = dsItems();

//So at this point how do I populate the picture in the <TD> tag I mentioned earlier?