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<asp:SqlDataSource ID="SqlDataSource_Registration" runat="server" ConnectionString="<%$ ConnectionStrings:odvConnectionString %>" InsertCommand="INSERT INTO Registration(ID, Course, Student) VALUES (NEWID(), @Course, @Student)" SelectCommand="SELECT [ID], [Course], [Student] FROM [Registration]">

      <InsertParameters>

        <asp:ControlParameter ControlID="DDL_Course" Name="Course" PropertyName="SelectedValue" />

        <asp:ControlParameter ControlID="DDL_Student" Name="Student" PropertyName="SelectedValue" />

      </InsertParameters>