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Question : BindingList(Of T) generate exception when replacing items
Hi experts,
I use BindingList(Of T) and when i want to replace a specific item in the list, i have an exception :
The list must be an IBindingList to AddNew
Here is the StackTrace :
at System.Windows.Forms.Curre
ncyManager
.AddNew()
at System.Windows.Forms.Relat
edCurrency
Manager.Pa
rentManage
r_CurrentI
temChanged
(Object sender, EventArgs e)
at System.EventHandler.Invoke
(Object sender, EventArgs e)
at System.Windows.Forms.Curre
ncyManager
.OnCurrent
ItemChange
d(EventArg
s e)
at System.Windows.Forms.Relat
edCurrency
Manager.Pa
rentManage
r_CurrentI
temChanged
(Object sender, EventArgs e)
at System.EventHandler.Invoke
(Object sender, EventArgs e)
at System.Windows.Forms.Curre
ncyManager
.OnCurrent
ItemChange
d(EventArg
s e)
at System.Windows.Forms.Curre
ncyManager
.List_List
Changed(Ob
ject sender, ListChangedEventArgs e)
at System.ComponentModel.List
ChangedEve
ntHandler.
Invoke(Obj
ect sender, ListChangedEventArgs e)
at System.ComponentModel.Bind
ingList`1.
OnListChan
ged(ListCh
angedEvent
Args e)
at System.ComponentModel.Bind
ingList`1.
FireListCh
anged(List
ChangedTyp
e type, Int32 index)
at System.ComponentModel.Bind
ingList`1.
SetItem(In
t32 index, T item)
at System.Collections.ObjectM
odel.Colle
ction`1.se
t_Item(Int
32 index, T value)
I don't understand why because is some case, it works...
Thank you,
Regards.
1:
Me.DataSource.Item(index) = lRestoreMonitorDesign
Answer : BindingList(Of T) generate exception when replacing items
Dude are you trying to replace the object at ith position?
If yes, then you should better take that object@ith index into some object and work upon it.
binding list lets you upate/add/delete the object but you can't replace the object reference altogther
For doing this remove the requirec object and add a new one.
This is exactly the error says "The list must be an IBindingList to AddNew"
hope this helps :)
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