Editing a Drop down value

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   I need help with my code for editing a drop down value in ASP.Net. I am having some problems. I am not getting an error message. It will show all of the options. It will show the selected value. But it won't let me edit it correctly. When I edit it, it gives a random ClientID instead of the correct ClientID. I am not sure what's wrong.
Can someone please look at my code especially the bolded parts to see what might be wrong?

Here's my code:

        '------------------------------------------------------------ 
        ' name: DisplayAsString( _objFieldValue as object) As String 
        '------------------------------------------------------------ 
        Function DisplayAsString( _objFieldValue as object) As String 

                dim strDisplay as String 

                if _objFieldValue Is System.DBNull.Value then 
                 &nbs p;       strDisplay = String.Empty 
                else 
                 &nbs p;       strDisplay = _objFieldValue.ToString() 
                end if 

                return strDisplay 

        End Function 

        '---------------------------------------------------------------- 
        ' name: BindDropDownList() 
        '---------------------------------------------------------------- 
        Sub BindDropDownList( _strDomID as String )

        Dim BusinessNameValue As String 

    Dim strSQL as String
    Dim strConnect As String    
    Dim conClient As SqlConnection
    Dim cmdSelect As New System.Data.SqlClient.SQLCommand
    Dim dtrClient As SqlDataReader

    'Get connection string from Web.Config