I have used the feedback on this issue to remedy my comboboxes showing
the first item on the list when a new record is added to the binding
context ---
Me.BindingContext(dsOrders, "tblOrders").AddNew()
Me.ComboBox1.SelectedIndex = -1
but... how do we deal with the same issue during record navigation?
When I move forward or backward onto a null field the combo defaults to
the first item on the list again?
Me.BindingContext(dsOrders, "tblOrders").Position =
(Me.BindingContext(dsOrders, "tblOrders").Position + 1)
I am convinced that anyone using combos is having this problem...
I am binding early, clearing and rebinding late, trying many variations
to no avail. I have added an empty string value to the first item of
all my combos - this displays an empty box for null fields, but is not
optimal. Anybody have a workaround for this?? 2 2825
I prefer an unbound combobox.
Tom
Nate wrote: I have used the feedback on this issue to remedy my comboboxes showing the first item on the list when a new record is added to the binding context --- Me.BindingContext(dsOrders, "tblOrders").AddNew() Me.ComboBox1.SelectedIndex = -1
but... how do we deal with the same issue during record navigation? When I move forward or backward onto a null field the combo defaults to the first item on the list again?
Me.BindingContext(dsOrders, "tblOrders").Position = (Me.BindingContext(dsOrders, "tblOrders").Position + 1)
I am convinced that anyone using combos is having this problem...
I am binding early, clearing and rebinding late, trying many variations to no avail. I have added an empty string value to the first item of all my combos - this displays an empty box for null fields, but is not optimal. Anybody have a workaround for this??
Hi,
"Nate" <na***************@hitchcock.org> wrote in message
news:11**********************@f14g2000cwb.googlegr oups.com... I have used the feedback on this issue to remedy my comboboxes showing the first item on the list when a new record is added to the binding context --- Me.BindingContext(dsOrders, "tblOrders").AddNew() Me.ComboBox1.SelectedIndex = -1
but... how do we deal with the same issue during record navigation? When I move forward or backward onto a null field the combo defaults to the first item on the list again?
I recently posted a workaround for what i can only guess deals with your
problem. Are you talking about lookup ComboBox's to which you have added a
binding for SelectedValue ?,eg.:
Me.ComboBox1.Bindings.Add( "SelectedValue", dsOrders,
"tblOrders.SomeFkField" )
If so, then yes there is a problem with null values, and here is a
workaround:
AddHandler Me.BindingContext(dsOrders, "tblOrders").PositionChanged, _
AddressOf CmPositionChanged
Private Sub CmPositionChanged( ByVal sender As Object, ByVal e As
System.EventArgs)
'
Dim cm As CurrencyManager = _
DirectCast(sender, CurrencyManager)
Dim lv As DataRowView = _
DirectCast(cm.Current, DataRowView)
Dim cb As ComboBox
For Each bnd As Binding In cm.Bindings
If (bnd.PropertyName = "SelectedValue") And _
(TypeOf (bnd.Control) Is ComboBox) Then
cb = DirectCast(bnd.Control, ComboBox)
If (lv(bnd.BindingMemberInfo.BindingField) Is DBNull.Value) And _
(cb.SelectedIndex <> -1) Then
cb.SelectedIndex = -1
End If
End If
Next
End Sub
HTH,
Greetings Me.BindingContext(dsOrders, "tblOrders").Position = (Me.BindingContext(dsOrders, "tblOrders").Position + 1)
I am convinced that anyone using combos is having this problem...
I am binding early, clearing and rebinding late, trying many variations to no avail. I have added an empty string value to the first item of all my combos - this displays an empty box for null fields, but is not optimal. Anybody have a workaround for this?? This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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