I am new to ASP.net and still learning different terms etc.

This is the online form of a telephone company, where a user may request to add more than one telephone lines. The form has text boxes as well as a dropdown box.

I am using ListView to display list of telephone line requests from a user and binding data with it on "OnPreRender"

PHP Code:
<asp:ListView ID="ContactSupport" runat="server" OnPreRender="ContactSupport_PreRender">
                  <
ItemTemplate>
                      <
tr>
                        <
td><asp:TextBox ID="txtNetworkProvider" runat="server" Text='<%#Eval("txtNetworkProvider") %>'></asp:TextBox></td>
                        <
td><asp:DropDownList ID="txtTypeOfLine" runat="server" >
                        <
asp:ListItem Text="A" Value="A"></asp:ListItem>
                        <
asp:ListItem Text="12" Value="12"></asp:ListItem>
                    </
asp:DropDownList></td>
                      </
tr>
                  </
ItemTemplate>
              </
asp:ListView
PHP Code:
 ContactSupport.DataSource ds.Tables["Records"];
                
ContactSupport.DataBind(); 
The binding works fine for textboxes, but I could not find a way to bind data with dropdowns.

Please help.