DropDownList controls doesnt show the data after postback.

I am using a FormView and ajaxToolkit:CollapsiblePanelExtender. My DropDownLists show the data the first time, but after I press a button and it does a post back, the DropDownLists does not show the data even though I can debug and see that I am adding the items in the code-behind. Please help.

<asp:FormViewID="FormView1"runat="server"DataKeyNames="ID"DataSourceID="CslaDataSource1"DefaultMode="Insert"Width="95%">

<InsertItemTemplate>

<tableborder="0"width="100%">

<tr>

<tdalign="left">

<asp:PanelID="description_HeaderPanel"runat="server"style="cursor: pointer;">

<div>

<asp:ImageButtonID="Description_ToggleImage"runat="server"ImageUrl="~/Image/plus.gif"AlternateText="collapse"/> Search

</div>

</asp:Panel>

<asp:Panelid="description_ContentPanel"runat="server"style="overflow:hidden;">

<tableborder="0">

<tr>

<tdcolspan="6"> </td>

</tr>

<tr>

<tdalign="right">Alert ID:</td>

<td><asp:TextBoxID="txtID"runat="server"Text='<%# Bind("ID") %>'/></td>

<td> </td>

<td> </td>

<td> </td>

<td> </td>

</tr>

<tr>

<tdalign="right"style="width:16.5%">Server:</td>

<tdstyle="width:16.5%"><asp:TextBoxID="txtServer"runat="server"Text='<%# Bind("Server") %>'/></td>

<tdalign="right"style="width:16.5%">Source:</td>

<tdstyle="width:16.5%">

<asp:DropDownListID="ddlSource"runat="server"SelectedValue='<%# Bind("Source") %>'>

<asp:ListItemValue="0"Text=""/>

</asp:DropDownList>

</td>

<tdalign="right"style="width:16.5%">Manager:</td>

<td>

<asp:DropDownListID="ddlManager"runat="server"SelectedValue='<%# Bind("Manager") %>'>

<asp:ListItemValue="0"Text=""/>

</asp:DropDownList>

</td>

</tr>

<tr>

<tdalign="right">Type:</td>

<td>

<asp:DropDownListID="ddlType"runat="server"SelectedValue='<%# Bind("Type") %>'>

<asp:ListItemValue="0"Text=""/>

</asp:DropDownList>

</td>

<tdalign="right">Severity:</td>

<td>

<asp:DropDownListID="ddlSeverity"runat="server"SelectedValue='<%# Bind("Severity") %>'>

<asp:ListItemValue="0"Text=""/>

</asp:DropDownList>

</td>

<tdalign="right">Detail:</td>

<td><asp:TextBoxID="txtDetail"runat="server"Text='<%# Bind("Detail") %>'/></td>

</tr>

<tr>

<tdalign="right">From:</td>

<td>

<asp:TextBoxID="txtFrom"runat="server"/> <asp:ImageButtonrunat="Server"ID="Image1"ImageUrl="~\Image\Calendar.png"AlternateText="Click to show calendar"/>

<ajaxToolkit:CalendarExtenderID="ajaxCalendar1"runat="server"TargetControlID="txtFrom"PopupButtonID="Image1"/>

</td>

<tdalign="right">To:</td>

<td>

<asp:TextBoxID="txtTo"runat="server"/> <asp:ImageButtonrunat="Server"ID="Image2"ImageUrl="~\Image\Calendar.png"AlternateText="Click to show calendar"/>

<ajaxToolkit:CalendarExtenderID="ajaxCalendar2"runat="server"TargetControlID="txtTo"PopupButtonID="Image2"/>

</td>

<td> </td>

<td> </td>

</tr>

<tr>

<tdalign="right">Status:</td>

<td>

<asp:DropDownListID="ddlStatus"runat="server"SelectedValue='<%# Bind("Status") %>'>

<asp:ListItemValue="0"Text=""/>

</asp:DropDownList>

</td>

<tdalign="right">Ticket ID:</td>

<td><asp:TextBoxID="txtTicketID"runat="server"Text='<%# Bind("Ticket") %>'/></td>

<td> </td>

<td> </td>

</tr>

<tr>

<tdcolspan="6"> </td>

</tr>

<tr>

<tdalign="center"colspan="6"><asp:ButtonID="btnSubmit"runat="server"Text="Submit"CausesValidation="false"CommandName="Insert"/></td>

</tr>

<tr>

<tdcolspan="6"> </td>

</tr>

</table>

</asp:Panel>

</td>

</tr>

</table>

<ajaxToolkit:CollapsiblePanelExtenderID="cpeSearch"runat="Server"TargetControlID="description_ContentPanel"ExpandControlID="description_HeaderPanel"CollapseControlID="description_HeaderPanel"Collapsed="true"ImageControlID="description_ToggleImage"ExpandedText="(Hide Details...)"CollapsedText="(Show Details...)"ExpandedImage="~/Image/minus.gif"CollapsedImage="~/Image/plus.gif"/>

</InsertItemTemplate>

</asp:FormView>

Hi, ensure your dropdownlistbox are only loaded on page load - try something like this:

Protected Sub Page_Load(ByVal senderAs Object,ByVal eAs System.EventArgs)Handles Me.LoadIf Not IsPostBackThen'Load the DropdownListbox with number 1 to 10Dim aAs Int16For a = 1To 10 DrpLstTest.Items.Add(a)Next aEnd If End Sub

Thanks.

That was the first thing I tried. It didn't solve the problem.

I think the problem has to do with FormView, AJAX's CollapsiblePanelExtender, and ASP.NET.

Please help!