DropDownList - First row must be empty

Posted on 2006-06-22
Last Modified: 2012-06-27
Hi !
I'm using ASP.NET 2.0 and VS 2005

In my form I have a DropDownList that is populated with a SQLDataSource SELECT DISTINCT ......etc.

I need the DropDownList to have one empty row first so the user does not have to make a selection.

Question by:Contestoas
LVL 16

Accepted Solution

Swapnil Piparia earned 250 total points
Comment Utility
Hi Contestoas,
you can add dropdown item after pupulating it as following
dropdownlist1.items.insert(0," ")


Author Comment

Comment Utility
I Tried putting the code in Page_Load Event but the empty row did not show !
On what event should I put the code??

The DropDownList is bound directly to a SQLDataSource object on the page .....
.... so I guess that I should add the code after the SQLDataSource has finished poplulating the DropDownList .


Expert Comment

Comment Utility
page_load is the right spot, and your right it would need to happen after the SQLDataSource databind - I'd also check postback and only populate the list once on initial page load, here is a sample

 Sub Page_Load(sender As Object, e As EventArgs)
      If Not Page.IsPostBack Then
          Dim myConnection As SqlConnection = new SqlConnection(ConfigurationSettings.AppSettings("pubs"))

        Dim myCommand As SqlCommand = new SqlCommand("Select pub_id, pub_name From publishers", myConnection)
        Dim myDataReader As SqlDataReader


           myDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection)

           DropDownList1.DataSource = myDataReader
        Catch myException As Exception
           Response.Write("An error has occurred: " & myException.ToString())
           If Not myDataReader Is Nothing Then
           End If
              DropDownList1.Items.Insert(0, " ")
           DropDownList1.SelectedIndex = 0
        End Try
      End If

    End Sub

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