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單選按鈕的綁定到對象的單個屬性我有一個數據類定義如下（縮短爲了簡潔）：WPF數據網格（雙向）中收集
Partial Public Class ClassName
Inherits ObservableCollection(Of MyObject)
Public Event ItemPropertyChanged As PropertyChangedEventHandler
Private Property _ContainsChanges As Boolean
Public ReadOnly Property ContainsChanges As Boolean
Get
Return _ContainsChanges
End Get
End Property
Protected Overridable Sub Notify_PropertyChanged(ByVal PropertyName As String)
MyBase.OnPropertyChanged(New PropertyChangedEventArgs(PropertyName))
End Sub
Protected Overridable Sub Notify_ItemPropertyChanged(ByVal e As PropertyChangedEventArgs)
RaiseEvent ItemPropertyChanged(Me, e)
End Sub
Protected Overridable Sub Me_PropertyChanged(ByVal sender As Object, e As PropertyChangedEventArgs) Handles Me.PropertyChanged
Me._ContainsChanges = True
End Sub
Protected Overridable Sub Me_CollectionChanged(Sender As Object, e As NotifyCollectionChangedEventArgs) Handles Me.CollectionChanged
If e.Action = NotifyCollectionChangedAction.Add Then
For Each item As Account In e.NewItems
AddHandler item.PropertyChanged, AddressOf Account_PropertyChanged
Next
ElseIf e.Action = NotifyCollectionChangedAction.Remove Then
For Each item As Account In e.OldItems
RemoveHandler item.PropertyChanged, AddressOf Account_PropertyChanged
Next
End If
End Sub
Protected Overridable Sub MyObject_PropertyChanged(ByVal sender As Object, ByVal e As PropertyChangedEventArgs)
Me._ContainsChanges = True
Notify_ItemPropertyChanged(e)
End Sub
Partial Public Class MyObject
Implements INotifyPropertyChanged
Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged
Private Property _ContainsChanges As Boolean
Public ReadOnly Property ContainsChanges As Boolean
Get
Return _ContainsChanges
End Get
End Property
Private Property _IntegerProperty As Integer
Public Property IntegerProperty As Integer
Get
Return _IntegerProperty
End Get
Set(value As Integer)
If value <> _IntegerPropertyThen
_IntegerProperty= value
Notify_PropertyChanged("IntegerProperty")
End If
End Set
End Property
Private Property _BooleanProperty As Nullable(Of Boolean)
Public Property BooleanProperty As Nullable(Of Boolean)
Get
Return _BooleanProperty
End Get
Set(value As Boolean)
If value <> _BooleanProperty Then
_BooleanProperty = value
Notify_PropertyChanged("BooleanProperty ")
End If
End Set
End Property
Private Sub Notify_PropertyChanged(ByVal PropertyName As String)
RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(PropertyName))
End Sub
Protected Overridable Sub Me_PropertyChanged(sender As Object, e As PropertyChangedEventArgs) Handles Me.PropertyChanged
Me._ContainsChanges = True
End Sub
End Class
End Class
這個集合被綁定到一個WPF用戶使用數據網格作爲其唯一元素進行控制。集合中的每個對象都由數據網格中的一行表示。該XAML如下所示：
<UserControl
x:Class="WPFControlNameSpace.WPFControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:converters="clr-namespace:WPFControlLibrary.WPFControlNameSpace.Converters"
DataContext="{Binding DataGrid}">
<UserControl.Resources>
<converters:BooleanConverter x:Key="BooleanConverter"/>
<Style TargetType="{x:Type DataGridColumnHeader}" x:Key="dgHeaderStyle">
<Setter Property="Background" Value="Beige" />
<Setter Property="Height" Value="30" />
<Setter Property="FontSize" Value="15" />
<Setter Property="BorderBrush" Value="Black" />
<Setter Property="FontWeight" Value="Bold" />
<Setter Property="BorderThickness" Value=".5" />
<Setter Property="HorizontalContentAlignment" Value="Center" />
<Setter Property="FontFamily" Value="Arial" />
</Style>
<Style TargetType="{x:Type DataGrid}" x:Key="dgStyle">
<Setter Property="AlternatingRowBackground" Value="Beige" />
<Setter Property="AutoGenerateColumns" Value="False" />
<Setter Property="CanUserAddRows" Value="False" />
<Setter Property="CanUserDeleteRows" Value="False" />
<Setter Property="FontSize" Value="13" />
<Setter Property="MinColumnWidth" Value="30" />
</Style>
</UserControl.Resources>
<DataGrid x:Name="dgClassName"
ItemsSource="{Binding}"
ColumnHeaderStyle ="{StaticResource dgHeaderStyle}"
Style="{StaticResource dgStyle}"
RowDetailsVisibilityMode="Collapsed"
HeadersVisibility="Column"
FontFamily="Arial">
<DataGrid.RowStyle>
<Style TargetType="DataGridRow">
<Style.Triggers>
<DataTrigger Binding="{Binding lActive}" Value="True">
<Setter Property="ToolTip" Value="This row is Active!" />
</DataTrigger>
<DataTrigger Binding="{Binding lActive}" Value="False">
<Setter Property="ToolTip" Value="This row is Inactive!" />
</DataTrigger>
</Style.Triggers>
</Style>
</DataGrid.RowStyle>
<DataGrid.CellStyle>
<Style TargetType="DataGridCell">
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Foreground" Value="Black" />
<Setter Property="Background" Value="{x:Null}" />
<Setter Property="BorderBrush" Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
</DataGrid.CellStyle>
<DataGrid.Columns>
<DataGridTextColumn Header=" Account Number " Binding="{Binding nAccountNumber}" IsReadOnly="True" MinWidth="50"/>
<DataGridTextColumn Header=" Account Description " Binding="{Binding cAccountDescription}" IsReadOnly="True" MinWidth="50"/>
<DataGridTemplateColumn Header=" Verified ">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<StackPanel Grid.Row="1" Orientation="Horizontal">
<RadioButton Content="Yes"
IsChecked="{Binding BooleanProperty,
Converter={StaticResource BooleanConverter},
ConverterParameter='True', Mode=TwoWay}" />
<RadioButton Content="No"
IsChecked="{Binding BooleanProperty,
Converter={StaticResource BooleanConverter},
ConverterParameter='False', Mode=TwoWay}" />
<RadioButton Content="Unknown"
IsChecked="{Binding BooleanProperty,
Converter={StaticResource BooleanConverter},
ConverterParameter='Nothing', Mode=TwoWay}" />
</StackPanel>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</UserControl>
，我使用如下所示的轉換：
Namespace SungardVerification.Converters
Class BooleanConverter
Implements IValueConverter
Public Function Convert(value As Object, targetType As Type, parameter As Object, culture As System.Globalization.CultureInfo) As Object Implements IValueConverter.Convert
Dim SourceValue = CType(value, System.Nullable(Of Boolean))
Dim RadioButtonCheckedValue As Nullable(Of Boolean) = Nothing
If DirectCast(parameter, String).ToUpper.Trim() <> "NOTHING" Then
RadioButtonCheckedValue = Boolean.Parse(DirectCast(parameter, String))
End If
If (RadioButtonCheckedValue.HasValue AndAlso SourceValue.HasValue AndAlso RadioButtonCheckedValue.Value = SourceValue.Value) OrElse
(Not RadioButtonCheckedValue.HasValue AndAlso Not SourceValue.HasValue) Then
Return True
Else
Return False
End If
End Function
Public Function ConvertBack(value As Object, targetType As Type, parameter As Object, culture As System.Globalization.CultureInfo) As Object Implements IValueConverter.ConvertBack
Dim RadioButtonChecked = CType(value, Boolean)
Dim RadioButtonCheckedValue As Nullable(Of Boolean) = Nothing
Dim SourceValue As Nullable(Of Boolean) = Nothing
If RadioButtonChecked = True Then
If DirectCast(parameter, String).ToUpper.Trim() <> "NOTHING" Then
SourceValue = Boolean.Parse(DirectCast(parameter, String))
End If
Return SourceValue
Else
Return Binding.DoNothing
End If
End Function
End Class
End Namespace
該控制存在於一個用戶控件庫，並使用元素被包括在Windows窗體上主辦。
datagrid正確地將集合中的值綁定到單元格，但是此綁定的雙向方面無法正常工作。
我知道這可以用一個不確定的複選框來完成，但單選按鈕對於用戶選擇的含義會更清楚。
有沒有人有任何建議如何得到這個工作？