I created a deatailsview and in edit mode I want to replace the edit mode textbox with a dropdownlist.

I did the following so far: 

1. I converted the field into a TemplateField and deleted the textbox 
2. I addedd a dropdownlist with two static values y and n

What do I need to do to get the dropdownlist select value to edit the field like the texbox does?

1    <EditItemTemplate>
2    
3                         
4    
5                        <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" Style="position: relative; left: 0px;">
6    
7                            <asp:ListItem Value="Y">Yes</asp:ListItem>
8    
9                            <asp:ListItem Value="N">No</asp:ListItem>
10   
11                       </asp:DropDownList>
12   
13                   </EditItemTemplate>
14   
15                   <InsertItemTemplate>
16   
17                       <asp:DropDownList ID="DropDownList2" runat="server" Style="position: relative" AutoPostBack="True">
18   
19                           <asp:ListItem Selected="True">Yes</asp:ListItem>
20   
21                           <asp:ListItem>No</asp:ListItem>
22   
23                       </asp:DropDownList>
24   
25                   </InsertItemTemplate>
26   
27                   <ItemTemplate>
28   
29                       <asp:Label ID="Label1" runat="server" Text='

Hello,

you can use a binding expression for this. You want to bind the value of the selected value to a datasource:

<asp:DropDownList ID="DropDownList1" runat="server" SelectedValue='<%# Bind("Field") %>'>

The attribute SelectedValue is not listed by IntelliSense for a DropDownList, but it will bind against the property anyway.

Good luck!