ASP.NET DropDownList - GetSelectedIndices missing one selected item

Maybe I'm losing my mind - I thought this was straight forward.

ListCode.DataTextField = "code_desc";
ListCode.DataValueField = "code_id";
ListCode.DataSource = Foo.GetCodes();
ListCode.DataBind();

The selection mode is set to multipls and all is good, about 50 items with appropriate values displays. Then I select 5 items and submit the form. I do a

int[] indices = ListCode.GetSelectedIndices();

and the array only has the first four items that I selected. It seems that if I select multiple items in the list and submit the form, I'm only able开发者_运维知识库 to retrieve all but the last selected item - it doesn't matter if I use GetSelectedIndices or if I iterate through each item in the list.

Any help would be greatly appreciated.

You must be using a ListBox I assume. I made the following test app:

<asp:ListBox ID="lstTest" runat="server" SelectionMode="Multiple">
    <asp:ListItem Text="Test1" Value="1" />
    <asp:ListItem Text="Test2" Value="2" />
    <asp:ListItem Text="Test3" Value="3" />
    <asp:ListItem Text="Test4" Value="4" />
</asp:ListBox>
<asp:Button ID="btnTest" runat="server" Text="Test" OnClick="btnTest_Click" />
<asp:Label ID="lblTest" runat="server" />

protected void btnTest_Click(object sender, System.EventArgs e)
{
    int[] selectedIndexes = lstTest.GetSelectedIndices();
    lblTest.Text = selectedIndexes.Length.ToString();
}

Seems to work fine so I have to assume it has something to do with your binding or when you are fetching the indicies. Can you post a trimmed down version of your broken code?

Not really an answer, but I swapped in a checkboxlist and it worked like a champ.