1
我有一个ListView其DataTemplat e由ComboBox和一些TextBox es组成。 ComboBox绑定到映射到CollectionViewSource的Collection。 ListView可以有任意数量的行。在列表视图中将组合框绑定到组合框
问题是在一个ComboBox中选择一个项目会将它们全部更改。我确实希望它们都被填充相同的内容，但要能够独立设置。
参考资料部分包含以下内容：
<CollectionViewSource Source="{Binding ChildAccounts}" x:Key="ChildGroupedData">
<CollectionViewSource.GroupDescriptions>
<PropertyGroupDescription PropertyName="group"/>
</CollectionViewSource.GroupDescriptions>
</CollectionViewSource>
<!-- Template for each child item in ListView -->
<DataTemplate x:Key="ChildTemplate">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="90"/>
<ColumnDefinition Width="130"/>
<ColumnDefinition Width="90"/>
<ColumnDefinition Width="90"/>
<ColumnDefinition Width="90"/>
<ColumnDefinition Width="210"/>
</Grid.ColumnDefinitions>
<Label Grid.Column="0" Content="Account" HorizontalAlignment="Left" VerticalAlignment="Top" Foreground="{StaticResource CustomWhite}" FontSize="14" Width="80"/>
<ComboBox Grid.Column="1" SelectedValue="{Binding Path=accFrom}" ItemsSource="{Binding Source={StaticResource ChildGroupedData}}" ItemTemplate="{StaticResource AccountTemplate}" SelectedValuePath="ID" Width="120" Style="{StaticResource RoundedComboBox}" HorizontalAlignment="Left" VerticalAlignment="Center">
<ComboBox.GroupStyle>
<GroupStyle ContainerStyle="{StaticResource CustomExpanderComboGroupItemStyle}" HeaderTemplate="{StaticResource GroupHeader}"/>
</ComboBox.GroupStyle>
</ComboBox>
<Label Grid.Column="2" Content="Amount" HorizontalAlignment="Left" VerticalAlignment="Top" Foreground="{StaticResource CustomWhite}" FontSize="14" Width="80"/>
<TextBox Grid.Column="3" Text="{Binding Path=amount, StringFormat='#,##0.00'}" Style="{StaticResource RoundedTextBox}" Width="80" HorizontalAlignment="Left" VerticalAlignment="Center"/>
<Label Grid.Column="4" Content="Comment" HorizontalAlignment="Left" VerticalAlignment="Top" Foreground="{StaticResource CustomWhite}" FontSize="14" Width="80"/>
<TextBox Grid.Column="5" Text="{Binding Path=comment}" Style="{StaticResource RoundedTextBox}" Width="200" HorizontalAlignment="Left" VerticalAlignment="Center"/>
</Grid>
</DataTemplate>
<!-- ListView template -->
<Style x:Key="ChildListViewStyle" TargetType="{x:Type ListView}">
<Setter Property="ItemTemplate" Value="{DynamicResource ChildTemplate}"/>
<Setter Property="Background" Value="{StaticResource CustomBackground}"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="HorizontalAlignment" Value="Left"/>
<Setter Property="Margin" Value="10,10,10,10"/>
<Setter Property="VerticalAlignment" Value="Top"/>
<Setter Property="Padding" Value="0,0,50,0"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Style.Resources>
<!-- Makes selection invisible when focus lost -->
<SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="{StaticResource CustomBackgroundC}"/>
</Style.Resources>
</Style>
的ListView定义为：
<ListView Grid.Column="0" x:Name="lstChildren" Margin="20,30,0,0" ItemsSource="{Binding Path=Items}" Style="{StaticResource ChildListViewStyle}"/>
编辑：
在相关联的类被发现以下
Imports System.Data
Imports System.Data.OleDb
Imports System.Collections.ObjectModel
Imports System.ComponentModel
Class ItemView
Implements INotifyPropertyChanged
Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged
Private Sub NotifyPropertyChanged(ByVal info As String)
RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(info))
End Sub
....
Private _ChildAccounts As ObservableCollection(Of AccountEntry)
Public Property ChildAccounts As ObservableCollection(Of AccountEntry)
Get
Return _ChildAccounts
End Get
Set(value As ObservableCollection(Of AccountEntry))
_ChildAccounts = value
End Set
End Property
....
Private Sub ItemView_Initialized(sender As Object, e As EventArgs) Handles Me.Initialized
Dim dsacmd As OleDbDataAdapter
Dim dsa As New DataSet
Dim dva As DataView
Dim strSelect As String
Try
' ** Open a connection to the database.
cn = New OleDbConnection(strConnection)
cn.Open()
Me.DataContext = Me
strSelect = "SELECT Accounts.ID, Accounts.deleted, Accounts.accType, Accounts.currency as curr, IIf([Currencies.ID]=1,Accounts.comment,Accounts.comment & "" ("" & Currencies.symbol & "")"") AS comment, Currencies.comment AS currS FROM Currencies INNER JOIN Accounts ON Currencies.ID = Accounts.currency"
dsacmd = New OleDbDataAdapter(strSelect, cn)
dsacmd.Fill(dsa, "Accounts")
dva = New DataView(dsa.Tables("Accounts"))
dva.RowFilter = "accType=" & cVirtual.ToString & " AND deleted=False"
dva.Sort = "curr, comment"
ChildAccounts = New ObservableCollection(Of AccountEntry)(dva.ToTable.AsEnumerable().[Select](Function(i) New [AccountEntry](i("ID"), i("currS").TrimEnd(" "), i("comment"))))
....
Private Sub DisplayItem()
....
strSelect = ""
Dim Relations As Collection(Of Relation) = GetRelations(ID)
For Each r As Relation In Relations
strSelect &= "ID=" & r.ID.ToString & " OR "
Next
If strSelect <> "" Then strSelect = "SELECT * FROM Items WHERE " & strSelect.Substring(0, strSelect.Length - 4)
If strSelect <> "" Then
dsrcmd = New OleDbDataAdapter(strSelect, cn)
dsr.Clear()
dsrcmd.Fill(dsr, "Items")
lstChildren.DataContext = dsr
End If
....
谢谢。尝试第一个，它不起作用。组合框是空的。无法获得第二个编译。它说'找不到成员'ChildAccounts'的目标类型'和'l：ChildAccounts成员无效，因为它没有合格的类型名称。我将其更改为{x：Static l：ItemView.ChildAccounts} - 然后仅获取一个错误 - 无法在类型“ItemView”上找到成员'ChildAccounts'。我声明了xmlns：l =“clr-namespace：WpfAccounts”以允许访问命名空间。在代码中包含ChildAccounts的类称为ItemView。谢谢。 Andy – 2013-04-30 00:50:54
@AndyPowell第一种方法适用于我。你可以请张贴您的视图模型代码为ChuldAccounts属性和项目属性。如果需要修剪代码。保留名称空间和类结构。我把我的工作解决方案发布到Dropbox上，所以你可以尝试一下。与ListView绑定的属性Items是ItemView类对象的可观察集合吗？ – Viv 2013-04-30 06:24:37
@AndyPowell我已经在选项1后更新了我的答案，并附有链接以下载显示选项1工作的示例项目。下载它，看看你的VM属性声明是如何不同的。我在答案中提到的选项2是针对静态变量的。如果你的财产不是静态的，你不能使用它。 – Viv 2013-04-30 07:04:15