Data Binding and User Controls

[ncarnal]

I am binding to a UserControl:

MyControl.DataBindings.Add("MyProperty",bindingsource,"PropertyOfBindingSource")

Within my UserControl, I have setup INotifyPropertyChanged and I raise
the event PropertyChanged to tell the binding source I have made a
change to MyProperty. But no update is taking place.

MyProperty sets the Text value of a TextBox and conversely, anychanges
to the TextBox.Text property set the value of MyProperty.

Any ideas would be greatly appreciated.

Thanks

ncarnal

 

[ncarnal]

I am binding to a UserControl:

MyControl.DataBindings.Add("MyProperty",bindingsource,"PropertyOfBindingSource")

Within my UserControl, I have setup INotifyPropertyChanged and I raise
the event PropertyChanged to tell the binding source I have made a
change to MyProperty. But no update is taking place.

MyProperty sets the Text value of a TextBox and conversely, anychanges
to the TextBox.Text property set the value of MyProperty.

Any ideas would be greatly appreciated.

Thanks

ncarnal

I failed to include I am attempting to accomplish this with
WindowsForms 2.0.

Thanks

ncarnal

 

[Larry Lard]

I am binding to a UserControl:

MyControl.DataBindings.Add("MyProperty",bindingsource,"PropertyOfBindingSource")

Within my UserControl, I have setup INotifyPropertyChanged and I raise
the event PropertyChanged to tell the binding source I have made a
change to MyProperty. But no update is taking place.

MyProperty sets the Text value of a TextBox and conversely, anychanges
to the TextBox.Text property set the value of MyProperty.

Any ideas would be greatly appreciated.

Show us some code. Not everything: just enough
(<http://www.yoda.arachsys.com/csharp/complete.html>).

 

[ncarnal]

Show us some code. Not everything: just enough
(<http://www.yoda.arachsys.com/csharp/complete.html>).

--
Larry Lard
(e-mail address removed)
The address is real, but unread - please reply to the group
For VB and C# questions - tell us which version

Thanks for your inquiry. The costPickup is a CostLine.

Me.costPickup.DataBindings.Add("Cost", _bindingSource, "Pickup")

Public Class CostLine
Implements INotifyPropertyChanged

Private _labelFont As Font
Private _labelForeColor As Color
Private _percentFont As Font

Private _labelFontSelected As Font
Private _percentFontSelected As Font

Public Event PropertyChanged(ByVal sender As Object, ByVal e As
System.ComponentModel.PropertyChangedEventArgs) Implements
System.ComponentModel.INotifyPropertyChanged.PropertyChanged

Private _cost As Single
Public Property Cost() As Single
Get
Return _cost
End Get
Set(ByVal Value As Single)
_cost = Value
If _cost <= 0 Then
Me.curCost.Text = String.Empty
Else
Me.curCost.Text = _cost.ToString
End If
'.Item("Cost") = _cost
'MyBase.OnValidated(EventArgs.Empty)
FirePropertyChangedNotification("Cost")
End Set
End Property

Private Sub FirePropertyChangedNotification(ByVal propName As
String)
RaiseEvent PropertyChanged(Me, New
PropertyChangedEventArgs(propName))
End Sub
End Class

The data loads correctly from the BindingSource; however, no update is
made to the binding source upon changing the data in the costPickup
object.

Thanks again

nathan

 

[Larry Lard]

Thanks for your inquiry. The costPickup is a CostLine.

Me.costPickup.DataBindings.Add("Cost", _bindingSource, "Pickup")

Public Class CostLine
Implements INotifyPropertyChanged

Private _labelFont As Font
Private _labelForeColor As Color
Private _percentFont As Font

Private _labelFontSelected As Font
Private _percentFontSelected As Font

Public Event PropertyChanged(ByVal sender As Object, ByVal e As
System.ComponentModel.PropertyChangedEventArgs) Implements
System.ComponentModel.INotifyPropertyChanged.PropertyChanged

Private _cost As Single
Public Property Cost() As Single
Get
Return _cost
End Get
Set(ByVal Value As Single)
_cost = Value
If _cost <= 0 Then
Me.curCost.Text = String.Empty
Else
Me.curCost.Text = _cost.ToString
End If
'.Item("Cost") = _cost
'MyBase.OnValidated(EventArgs.Empty)
FirePropertyChangedNotification("Cost")
End Set
End Property

Private Sub FirePropertyChangedNotification(ByVal propName As
String)
RaiseEvent PropertyChanged(Me, New
PropertyChangedEventArgs(propName))
End Sub
End Class

The data loads correctly from the BindingSource; however, no update is
made to the binding source upon changing the data in the costPickup
object.

That looks OK from here. Right now I think the best thing would be for
you to post your question to
microsoft.public.dotnet.framework.windowsforms.databinding, because the
people there will probably be able to spot the problem more quickly than
me Include some more code too, like where you change the Cost
property, and the code that sets up the BindingSource. Enough to make a
functional program.