DataGrid_Update Sees One DropDownList, Ignores Another

[spamguy]

Assume a DataGrid that, during edit mode, has two DropDownMenus, ddlA
and ddlB. Upon clicking 'Save,' the app performs the simplified task
of copying the DDL values of each to a label.

public void dg_Update(Object sender, DataGridCommandEventArgs e)
{
        // VARIABLES --------------
        DropDownList ddlA = (DropDownList) e.Item.FindControl("ddlAEdit");
        DropDownList ddlB = (DropDownList) e.Item.FindControl("ddlBEdit");
        // ------------------------
 
        Label1.Text = ddlA.SelectedValue + " " + ddlB.SelectedValue;
 
}

<columns>
    <asp:templatecolumn>
        <itemtemplate>blah</itemtemplate>
        <edititemtemplate>
            <asp:dropdownlist id="ddlAEdit" datasource="<%# FillAList() %>" datavaluefield="ID" datatextfield="Name" selectedvalue='<%# Convert.ToInt32(DataBinder.Eval(Container, "DataItem.AID")) %>' ondatabinding="ddlEdit_ItemDataBound" runat="server" />
        </edititemtemplate>
    </asp:templatecolumn>
        <asp:templatecolumn>
        <itemtemplate>blah</itemtemplate>
        <edititemtemplate>
            <asp:dropdownlist id="ddlBEdit" datasource="<%# FillBList() %>" selectedvalue='<%# DataBinder.Eval(Container, "DataItem.BID").ToString() %>' datavaluefield="ID" datatextfield="Name" ondatabinding="ddlEdit_ItemDataBound" runat="server" />
        </edititemtemplate>
    </asp:templatecolumn>
</columns>

The output of Label1 will be 'X ', where X is the correct value from
ddlA -- ddlB's value is missing.

ddlB at least exists; were it not found, the app wouldn't operate at
all. Other quick checks confirm that the program recognises ddlB.
Despite this, it fails to see a SelectedItem there, while it reads the
same thing normally from its neighbour!

Thanks.

[nateraaaa]

How are you setting the value and text for ddlB? Are you using DataBind()? When you debug your code what value is it giving you for ddlB.SelectedValue?

Nathan

[spamguy]

How are you setting the value and text for ddlB? Are you using DataBind()? When you debug your code what value is it giving you for ddlB.SelectedValue?

Nathan

ddlB is filled through FillBList(), which is more or less FillAList() adjusted for different data:

public DataSet FillBList()
{
    SqlConnection    fillConnection = new SqlConnection(connection_string);
 
    DataSet listDataSet = new DataSet();
 
    SqlDataAdapter listAdapter = new SqlDataAdapter("SELECT ID, Name FROM TableB UNION SELECT -1, '' ORDER BY Name", fillConnection);
 
    if (fillConnection.State != ConnectionState.Open)
        fillConnection.Open();
 
    listAdapter.Fill(listDataSet, "TableB");
    fillConnection.Close();
 
    return listDataSet;
}

I use DataBind() in numerous places. The one that generates the DDLs upon clicking Edit is probably the one in the trigger dg_Edit(), which has nothing but setting the EditItemIndex and DataBind(). I am certain both DDLs are being data bound, because if I put something indicative in ddl_ItemDataBound() (e.g., disable the sending control to signify the function was triggered), both DDLs react.

ddlB.SelectedValue generates -1.