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我有一个 UI 元素，它是一个列表视图，其中包含另一个列表视图（一个垂直和一个水平）。

第一个listview的Itemsource是Objects的ObservableCollection，它又包含了一个子对象的ObservableCollection。两者都实现了 INotifyPropertyChanged 接口，并在有用时调用 PropetyChanged 事件。

如果我添加了新的子对象，我会看到我的第二个列表视图更新，但是当我更改一个值时，我看不到任何变化。在这种情况下，我必须做些什么来刷新我的 UI 元素吗？

这是我的列表视图

<ListView x:Name="LstInfoEtape" Margin="0,0,0,0" Style="{StaticResource BaseListView}" Grid.Row="2" Grid.Column="1" >
 <ListView.ItemTemplate>
  <DataTemplate>
   <ListView x:Name="LstEtape" ItemsSource="{Binding LstEtapes}"  Background="#00000000" SelectionChanged="ListView_SelectionChanged" ScrollViewer.ScrollChanged="ListView_ScrollChanged">
    <ListView.ItemsPanel>
     <ItemsPanelTemplate>
      <StackPanel Orientation="Horizontal" />
     </ItemsPanelTemplate>
    </ListView.ItemsPanel>
    <ListView.ItemTemplate>
     <DataTemplate>
      <Border Width="82"  CornerRadius="4" BorderBrush="{Binding ColorSelected}" BorderThickness="3,3,3,3" Visibility="{Binding EtapeVisible}" Background="{Binding ColorBackground}" MouseDown="Border_MouseDown">
       <Grid  Width="80" >
        <Grid.RowDefinitions>
         <RowDefinition Height="19"/>
        </Grid.RowDefinitions>
        <TextBlock Margin="2,0,2,0" x:Name="TxtDateRappel"  TextWrapping="Wrap" Grid.Row="0" Text="{Binding DateRappelTerminaison,StringFormat=yyyy-MM-dd,NotifyOnSourceUpdated=True}" Visibility="{Binding EtapeVisible}" FontSize="12" Foreground="{Binding ColorForeground}" />
       </Grid>
      </Border>
     </DataTemplate>
    </ListView.ItemTemplate>
   </ListView>
  </DataTemplate>
 </ListView.ItemTemplate>
</ListView>

我使用的课程是那些

Public Class SuiviOperationLite
Implements INotifyPropertyChanged

Private _strNom As String
Private _oLstProcessusLite As ObservableCollection(Of ContratProcessusLite) ' Not implemented yet

Private _oLstEtapeLite As ObservableCollection(Of ContratProcessusEtapeLite)

Public Sub New(ByVal strNom As String,
               ByVal oLstProcessusLite As ObservableCollection(Of ContratProcessusLite),
               ByVal oLstEtapeLite As ObservableCollection(Of ContratProcessusEtapeLite))

    Constructor(strNom, oLstProcessusLite, oLstEtapeLite)

End Sub

Private Sub Constructor(ByVal strNom As String,
                        ByVal oLstProcessusLite As ObservableCollection(Of ContratProcessusLite),
               ByVal oLstEtapeLite As ObservableCollection(Of ContratProcessusEtapeLite))

    _strNom = strNom
    _oLstProcessusLite = oLstProcessusLite
    _oLstEtapeLite = oLstEtapeLite
End Sub

Public Property Nom() As String
    Get
        Return _strNom
    End Get
    Set(ByVal value As String)
        _strNom = value
    End Set
End Property

Public Property LstContratProcessus() As ObservableCollection(Of ContratProcessusLite)
    Get
        Return _oLstProcessusLite
    End Get
    Set(ByVal value As ObservableCollection(Of ContratProcessusLite))
        _oLstProcessusLite = value
    End Set
End Property

Public Property LstEtapes() As ObservableCollection(Of ContratProcessusEtapeLite)
    Get
        Return _oLstEtapeLite
    End Get
    Set(ByVal value As ObservableCollection(Of ContratProcessusEtapeLite))
        _oLstEtapeLite = value
    End Set
End Property

Protected Friend Sub NotifyPropertyChanged(ByVal info As String)      
    RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(info))
End Sub

Public Event PropertyChanged(sender As Object, e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged
End Class


Public Class ContratProcessusEtapeLite
Implements INotifyPropertyChanged

Private _lngId As Long
Private _lngIdSequenceTravail As Long
Private _boolSelected As Boolean
Private _strETapeVisible As String
Private _strColorBackGround As String
Private _strColorForeGround As String
Private _dateRappelTerminaison As Date
Private _oParent As DAL.SuiviOperationLite

Public Sub New(ByVal oParent As DAL.SuiviOperationLite,
               ByVal lngId As Long,
               ByVal lngIdSequenceTravail As Long,
               ByVal boolSelected As Boolean,
               ByVal strEtapeVisible As String,
               ByVal strColorBackGround As String,
               ByVal strColorForeGround As String,
               ByVal dateRappelTerminaison As Date)

    Constructor(oParent,
                lngId, _
                lngIdSequenceTravail, _
                boolSelected, _
                strEtapeVisible, _
                strColorBackGround, _
                strColorForeGround, _
                dateRappelTerminaison)

End Sub

Private Sub Constructor(ByVal oParent As DAL.SuiviOperationLite,
                        ByVal lngId As Long,
                        ByVal lngIdSequenceTravail As Long,
                        ByVal boolSelected As Boolean,
                        ByVal strEtapeVisible As String,
                        ByVal strColorBackGround As String,
                        ByVal strColorForeGround As String,
                        ByVal dateRappelTerminaison As Date)

    _oParent = oParent
    _lngId = lngId
    _lngIdSequenceTravail = lngIdSequenceTravail
    _boolSelected = boolSelected
    _strETapeVisible = strEtapeVisible
    _strColorBackGround = strColorBackGround
    _strColorForeGround = strColorForeGround
    _dateRappelTerminaison = dateRappelTerminaison
End Sub

Public Property Parent() As DAL.SuiviOperationLite
    Get
        Return _oParent
    End Get
    Set(ByVal value As DAL.SuiviOperationLite)
        _oParent = value
    End Set
End Property


Public Property ID() As Long
    Get
        Return _lngId
    End Get
    Set(ByVal value As Long)
        _lngId = value
        NotifyPropertyChanged("ID")
    End Set
End Property

Public Property IdClientContratSequenceTravail() As Long
    Get
        Return _lngIdSequenceTravail
    End Get
    Set(ByVal value As Long)
        _lngIdSequenceTravail = value
        NotifyPropertyChanged("IdSequence")
    End Set
End Property

Public Property Selected() As Boolean
    Get
        Return _boolSelected
    End Get
    Set(ByVal value As Boolean)
        _boolSelected = value
        NotifyPropertyChanged("Selected")
    End Set
End Property

Public ReadOnly Property ColorSelected As String
    Get
        If _boolSelected Then
            Return "#FF4394DF"
        Else
            Return "#FF000000"
        End If
    End Get
End Property

Public Property EtapeVisible() As String
    Get
        Return _strETapeVisible
    End Get
    Set(ByVal value As String)
        _strETapeVisible = value
        NotifyPropertyChanged("Visible")
    End Set
End Property

Public Property ColorBackground() As String
    Get
        Return _strColorBackGround
    End Get
    Set(ByVal value As String)
        _strColorBackGround = value
        NotifyPropertyChanged("Background")
    End Set
End Property

Public Property ColorForeground() As String
    Get
        Return _strColorForeGround
    End Get
    Set(ByVal value As String)
        _strColorForeGround = value
        NotifyPropertyChanged("Foreground")
    End Set
End Property

Public Property DateRappelTerminaison() As Date
    Get
        Return _dateRappelTerminaison
    End Get
    Set(ByVal value As Date)
        _dateRappelTerminaison = value
        NotifyPropertyChanged("DateRappel")
    End Set
End Property

Private Sub NotifyPropertyChanged(ByVal info As String)
    RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(info))
    _oParent.NotifyPropertyChanged("Child")
End Sub

Public Event PropertyChanged(sender As Object, e As PropertyChangedEventArgs) Implements INotifyPropertyChanged.PropertyChanged
End Class

这里是功能（有更多的处理来获取项目的集合，但我怀疑它是否真的相关：

Private Sub LoadList(colSuivi as ObservableCollection(Of SuiviProductionLite)
     LstInfoEtape.ItemsSource = colSuivi 
End Sub

Private Sub Border_MouseDown(sender As System.Object, e As System.Windows.Input.MouseButtonEventArgs)
    Dim oBorder As Border


    Dim oEtapeLite As DAL.ContratProcessusEtapeLite

    Select Case e.Source.GetType.ToString
        Case "System.Windows.Controls.TextBlock"
            Dim oTxt As TextBlock = e.Source
            Dim oGrid As Grid = oTxt.Parent
            _oCurBorderDet = oGrid.Parent
        Case "System.Windows.Controls.Border"
            Dim oBrd As Border = e.Source
            _oCurBorderDet = e.Source
    End Select

    If Not _oCurBorderDet.DataContext.GetType().FullName.Equals("MS.Internal.NamedObject") Then
        oEtapeLite = _oCurBorderDet.DataContext
        oEtapeLite.Selected = True            
    End If


End Sub

当我进行一些跟踪时，我知道无论我点击我的 UI，两个 PropertyChanged 事件都会被调用。如果我执行手动“Items.Refresh”，我还可以看到 UI 正在更改，但我想删除手动刷新，因为它刷新所有内容，不仅是刚刚修改的项目，当面对大量数据时，需要更多的时间。

4

1 回答 1

1

我看到一个问题

Public Property IdClientContratSequenceTravail() As Long
    Get
        Return _lngIdSequenceTravail
    End Get
    Set(ByVal value As Long)
        _lngIdSequenceTravail = value
        NotifyPropertyChanged("IdSequence")
    End Set
End Property

通知中的名称错误

于 2013-04-03T21:31:10.880 回答