1
我有一個ListView其DataTemplat e由ComboBox和一些TextBox es組成。 ComboBox綁定到映射到CollectionViewSource的Collection。 ListView可以有任意數量的行。在列表視圖中將組合框綁定到組合框
問題是在一個ComboBox中選擇一個項目會將它們全部更改。我確實希望它們都被填充相同的內容，但要能夠獨立設置。
參考資料部分包含以下內容：
<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定義爲：
<ListView Grid.Column="0" x:Name="lstChildren" Margin="20,30,0,0" ItemsSource="{Binding Path=Items}" Style="{StaticResource ChildListViewStyle}"/>
編輯：
在相關聯的類被發現以下
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
....
謝謝。嘗試第一個，它不起作用。組合框是空的。無法獲得第二個編譯。它說'找不到成員'ChildAccounts'的目標類型'和'l：ChildAccounts成員無效，因爲它沒有合格的類型名稱。我將其更改爲{x：Static l：ItemView.ChildAccounts} - 然後僅獲取一個錯誤 - 無法在類型「ItemView」上找到成員'ChildAccounts'。我聲明瞭xmlns：l =「clr-namespace：WpfAccounts」以允許訪問命名空間。在代碼中包含ChildAccounts的類稱爲ItemView。謝謝。 Andy – 2013-04-30 00:50:54
@AndyPowell第一種方法適用於我。你可以請張貼您的視圖模型代碼爲ChuldAccounts屬性和項目屬性。如果需要修剪代碼。保留名稱空間和類結構。我把我的工作解決方案發布到Dropbox上，所以你可以嘗試一下。與ListView綁定的屬性Items是ItemView類對象的可觀察集合嗎？ – Viv 2013-04-30 06:24:37
@AndyPowell我已經在選項1後更新了我的答案，並附有鏈接以下載顯示選項1工作的示例項目。下載它，看看你的VM屬性聲明是如何不同的。我在答案中提到的選項2是針對靜態變量的。如果你的財產不是靜態的，你不能使用它。 – Viv 2013-04-30 07:04:15