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problem with updating from dropdownlist in detailsview


I have a detailsview with two fields: in editmode, one is a textbox and the
other is a dropdownlist.
i want to update both fields using the detailsview.
My problem: when clicking on the edit button, the modified text in the
textbox is effectively updated in the table, but instead of updating the
chosen value of the dropdownlist, the field in the table becomes empty (old
value is updated by nothing).
The items of the dropdownlist comes from table ("fotos"), but the
selectedvalue comes from table("inhoud") .
In editmode, i can see all the items of the dropdownlist and the
selectedvalue is also right.

Protected Sub DetailsView1_Da taBound(ByVal sender As Object, ByVal e As
System.EventArg s) Handles DetailsView1.Da taBound
Dim sql, foto, fotosel As String
Dim comd As SqlCommand
Dim dtreader As SqlDataReader
Dim dd1 As DropDownList
Dim z1 As ListItem

' i read here the value which must be the selectedvalue of the
Using mConnection As New SqlConnection(p aram.Connection String)
sql = "select foto_n1 from inhoud"
comd = New SqlCommand(sql, mConnection)
mConnection.Ope n()
dtreader = comd.ExecuteRea der
If Not dtreader.IsDBNu ll(0) Then fotosel = dtreader.GetStr ing(0)
dtreader.Close( )

'i read here all the possible items of the dropdownlist and put
them in the DD
sql = "select foto_na from fotos"
comd = New SqlCommand(sql, mConnection)
dtreader = comd.ExecuteRea der
If dtreader.HasRow s Then
While dtreader.Read()
foto = dtreader.GetStr ing(0)
If DetailsView1.Cu rrentMode = DetailsViewMode .Edit Then
dd1 = DetailsView1.Ro ws(1).FindContr ol("dd1")
z1 = New ListItem(foto, foto)
dd1.Items.Add(z 1)
dd1.SelectedVal ue = fotosel
End If
End While
End If
dtreader.Close( )
End Using
End Sub
<asp:SqlDataSou rce ID="SqlDataSour ce1" runat="server"
ConnectionStrin g="<%$ ConnectionStrin gs:myconn %>"
SelectCommand=" SELECT * FROM [inhoud]"
UpdateCommand=" UPDATE [inhoud] SET [foto_n1] = @foto_n1, [n1] =
@n1 WHERE [id] = @id">
<UpdateParamete rs>
<asp:Paramete r Name="foto_n1" Type="String" />
<asp:Paramete r Name="n1" Type="String" />
<asp:Paramete r Name="id" Type="Int32" />
</UpdateParameter s>
</asp:SqlDataSour ce>

<asp:DetailsVie w ID="DetailsView 1" runat="server" AllowPaging="Tr ue"
AutoGenerateEdi tButton="True" AutoGenerateRow s="False" DataKeyNames="i d"
DataSourceID="S qlDataSource1" >
<asp:BoundFie ld DataField="id" HeaderText="id"
InsertVisible=" False"
ReadOnly="True" Visible="false" SortExpression= "id" />

<asp:TemplateFi eld HeaderText="fot o niveau 1">
<ItemTemplate >
<asp:Label ID="Label2" runat="server" Text='<%#
Bind("foto_n1") %>'></asp:Label>
<EditItemTempla te>
<asp:DropDownLi st ID="dd1" runat="server"
</asp:DropDownLis t>
</EditItemTemplat e>
</asp:TemplateFie ld>

<asp:TemplateFi eld HeaderText="niv eau 1">
<ItemTemplate >
<asp:Label ID="Label1" runat="server" Text='<%# Bind("n1")
<EditItemTempla te>
<asp:TextBox ID="TextBox1" TextMode="Multi Line"
height="340px" runat="server" Text='<%# Bind("n1") %>'
</EditItemTemplat e>
</asp:TemplateFie ld>
</asp:DetailsView >
Oct 12 '08 #1
0 1481

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