Dropdown list in photo album

sophia · April 17th, 2010, 06:11 AM

sir, I am having problem in coding the if construct.

Code:

<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" AppendDataBoundItems="true" DataSourceID="LinqDataSource1" DataTextField="Name" DataValueField="Id" Width="129px">
    <asp:ListItem Value="-1">Please Choose Album</asp:ListItem>
</asp:DropDownList>

in the page_load event I am trying to set up the if construct like

Code:

If Not DropDownList1.SelectedItem Then
            ListView1.Visible = False
End If

But in first line I am having problem to properly code it.
how I can check the selected item for nothing ("asp:ListItem Value="-1">Please Choose Album</asp:ListItem>")?

Imar · April 17th, 2010, 06:48 AM

Hi sophia,

Quote:

how I can check the selected item for nothing

It's not Nothing; it's -1, so this should work:

Code:

If Not DropDownList1.SelectedValue = -1 Then
            ListView1.Visible = False
End If

Hope this helps,

Imar

sophia · April 17th, 2010, 06:57 AM

Not working.
Still getting the same message with Please Choose Album option.
Any other method to solve???

Imar · April 17th, 2010, 07:03 AM

If you debug, what's the value of the SelectedItem / SelectedValue?

Imar

sophia · April 17th, 2010, 07:17 AM

Problem was as we were getting the same value (-1) so it was getting out of loop due to NOT in if construct. I did remove it and now working fine.
Heuh a little missing made a thing giant.
well problem solved but thanks goes to you
Thank you sir.