Forms Data Controls :: Understanding Dropdownlist Within A Repeater Control

Asp.net 3.5 using code behind I am using a repeater control. My datasource appears in code behind. I decided to NOT have my listitems populate from the database. I want the user to select a value, send it to the database via an update statement, and then when the user returns to the page (on pageload), have the user's previous selections appear on the screen. note the following:

When I use textboxes and labels, ALL of my data appears within the table of the repeater control. However, when I replaced one of the text boxes (originally used for testing purposes only) with a dropdownlist, I get the following error message'ddlDDuring' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value My Repeater1_ItemCommandI updates the data within the repeater perfectly. On page load, I want the data from the database to display as the dropdownlist's selected value (or selected item.text). Here is my Asp code

<asp:Repeater ID="Repeater1" runat="server"
onitemcommand="Repeater1_ItemCommand">
---
<
td><asp:Dropdownlist ID="ddlDDuring" runat=server SelectedValue ='<%#Bind("DueDuring")%>' >
<asp:ListItem Value="-select-" Text="-select-" />
<asp:ListItem Value="1st half" Text="1st half" />
<asp:ListItem Value="2nd half" Text="2nd half" />
<asp:ListItem Value="Split" Text="Split" />
</asp:Dropdownlist> </td>
---
C# code behind
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
---
string myConnectString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
myConnection = new SqlConnection(myConnectString);
strSelect = "SELECT * FROM UserExpenses WHERE UserId=@UserId";
mySqlCmd = new SqlCommand(strSelect, myConnection);
myConnection.Open();
mySqlCmd.Parameters.AddWithValue("@UserId", LoggedOnUserId);
myReader = mySqlCmd.ExecuteReader();
Repeater1.DataSource = myReader;
Repeater1.DataBind();
myReader.Close();
myReader = mySqlCmd.ExecuteReader();
while (myReader.Read())
{
ExpAmount = Convert.ToDouble(myReader["Amount"]);
TotExp += ExpAmount;
---

I tried the following code changes on asp page: I changed "SelectedValue" to "Text" and still get the same error message I changed "SelectedValue" to "SelectedItem" and don't get the error message, but dropdown is not populated I set AppendDataBoundItems = true Set first list item value = "" Verified that every field in the table column matched the items in the dropdown list. There were NO null fields in the database.

I just want to understand this error message, as I have exhausted all that I am doing. I also made an attempt to bind the dropdown list, but sine this can only be done within the loop of finding the repeater control, I would either get an error message, or it just would not work.