You create a Microsoft ASP.NET application by using the Microsoft .NET Framework
version 3.5.The application contains a DataSourceControl named CategoriesDataSource that
is bound to a Microsoft SQL Server 2005 table. The CategoryName column is the primary
key of the table. You write the following code fragment in a FormView control. (Line
numbers are included for reference only.)
01 <tr>
02 <td align=”right”><b>Category:</b></td>
03 <td><asp:DropDownList ID=”InsertCategoryDropDownList”
04
05 DataSourceID=”CategoriesDataSource”
06 DataTextField=”CategoryName”
07 DataValueField=”CategoryID”
08 RunAt=”Server” />
09 </td>
10 </tr>
You need to ensure that the changes made to the CategoryID field can be written to the
database.Which code fragment should you insert at line 04?

A.
SelectedValue='<%# Eval(“CategoryID”) %>’

B.
SelectedValue='<%# Bind(“CategoryID”) %>’

C.
SelectedValue='<%# Eval(“CategoryName”) %>’

D.
SelectedValue='<%# Bind(“CategoryName”) %>’

Explanation:
Since the user must be able to both view and update the CategoryID field, one must use Bind rather than Eval.
The Binding must occur for CategoryID rather than CategoryName.