Custom CollectionEditor never triggers a property's “set” method
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12-11-2019 - |
题
I am trying to implement a way of persisting a collection in a custom settings class. I have successfully created the settings class (inheriting ApplicationSettingsBase) and can save properties using the built-in editors on a PropertyGrid, but my custom implementation of a property grid for collections doesn't persist any of the values I add. Here's my code:
Imports System.Configuration
Imports System.ComponentModel
Imports System.Drawing.Design
Imports System.ComponentModel.Design
Public Class CustomSettings
Inherits ApplicationSettingsBase
<UserScopedSetting()> _
<DefaultSettingValue("White")> _
Public Property BackgroundColor() As Color
Get
BackgroundColor = Me("BackgroundColor")
End Get
Set(ByVal value As Color)
Me("BackgroundColor") = value
End Set
End Property
<UserScopedSetting()> _
<DesignerSerializationVisibility(DesignerSerializationVisibility.Content)> _
<Editor(GetType(CustomStringCollectionEditor), GetType(UITypeEditor))> _
Public Property EmailAddresses() As Collection
Get
EmailAddresses = Me("EmailAddresses")
End Get
Set(ByVal value As Collection)
Me("EmailAddresses") = value
End Set
End Property
End Class
Public Class CustomStringCollectionEditor
Inherits CollectionEditor
Public Sub New()
MyBase.New(GetType(Collection))
End Sub
Protected Overrides Function CreateInstance(ByVal itemType As System.Type) As Object
Return String.Empty
End Function
Protected Overrides Function CreateCollectionItemType() As System.Type
Return GetType(String)
End Function
End Class
I set a breakpoint on the Set methods for both the BackgroundColor property and the EmailAddresses property. The BackgroundColor property works as it should - it breaks on the Set statement and stores the property correctly. But when I close the custom CollectionEditor dialog, the EmailAddresses "Set" method is never called. How can I get my custom editor to actually save the property once it's done being edited?
没有正确的解决方案