我正在使用wpf工具包中的WPF DataGrid和AvalonControlsLibrary中的TimePicker插入TimeSpans的集合。我的問題是綁定不在DataGrid內部工作,我不知道爲什麼這不起作用。WPF DataGrid和Avalon TimePicker綁定不起作用
這裏是我的設置:
我有以下XAML:
<Window x:Class="TestMainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:wpf="http://schemas.microsoft.com/wpf/2008/toolkit" xmlns:a="http://schemas.AvalonControls/AvalonControlsLibrary/Controls" SizeToContent="WidthAndHeight" MinHeight="250" MinWidth="300">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<GroupBox Grid.Row="0">
<GroupBox.Header>
Testing it:
</GroupBox.Header>
<wpf:DataGrid ItemsSource="{Binding Path=TestSpans}" AutoGenerateColumns="False">
<wpf:DataGrid.Columns>
<wpf:DataGridTemplateColumn Header="Start">
<wpf:DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<a:TimePicker SelectedTime="{Binding Path=Span, Mode=TwoWay}" />
</DataTemplate>
</wpf:DataGridTemplateColumn.CellEditingTemplate>
<wpf:DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Path=Span}" />
</DataTemplate>
</wpf:DataGridTemplateColumn.CellTemplate>
</wpf:DataGridTemplateColumn>
</wpf:DataGrid.Columns>
</wpf:DataGrid>
</GroupBox>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Grid.Row="1">
<a:TimePicker SelectedTime="{Binding Path=SelectedTime, Mode=TwoWay}" />
</StackPanel>
</Grid>
,這是我的ViewModel:
Imports System.Collections.ObjectModel
Public Class TestMainWindowViewModel
Private _selectedTime As TimeSpan = DateTime.Now.TimeOfDay
Public Property SelectedTime() As TimeSpan
Get
Return _selectedTime
End Get
Set(ByVal value As TimeSpan)
_selectedTime = value
End Set
End Property
Private _testSpans As ObservableCollection(Of TimeSpanContainer) = New ObservableCollection(Of TimeSpanContainer)
Public Property TestSpans() As ObservableCollection(Of TimeSpanContainer)
Get
Return _testSpans
End Get
Set(ByVal value As ObservableCollection(Of TimeSpanContainer))
_testSpans = value
End Set
End Property
Public Sub New()
_testSpans.Add(DateTime.Now.TimeOfDay)
_testSpans.Add(DateTime.Now.TimeOfDay)
_testSpans.Add(DateTime.Now.TimeOfDay)
End Sub
End Class
Public Class TimeSpanContainer
Private _span As TimeSpan
Public Property Span() As TimeSpan
Get
Return _span
End Get
Set(ByVal value As TimeSpan)
_span = value
End Set
End Property
Public Sub New(ByVal t As TimeSpan)
_span = t
End Sub
End Class
我開始這個窗口像這樣的application.xaml.vb:
Class Application
' Application-level events, such as Startup, Exit, and DispatcherUnhandledException
' can be handled in this file.
Protected Overrides Sub OnStartup(ByVal e As System.Windows.StartupEventArgs)
MyBase.OnStartup(e)
Dim window As TestMainWindow = New TestMainWindow
window.DataContext = New TestMainWindowViewModel()
window.Show()
End Sub
End Class
編輯1:我忘了提及與SelectedTime TimeSpan的綁定按預期工作。問題是DataGrid內部的綁定。
編輯2:更改了一些示例以更好地顯示問題。
是的,沒錯。當我進入編輯模式時,timepicker控件的值被設置爲當前時間,並且當我完成編輯時,textblock上的值與以前相同,所以我編輯的TimeSpanContainer.Span的值永遠不會改變。 – 2010-05-31 16:14:06
我會檢查出來,並通過添加UpdateSourceTrigger來查看它是否工作。感謝您的幫助人。 – 2010-06-09 12:46:57