我开发基于WPF + MVVM的Prism + MEF应用程序,其中有许多DataGrid,因此我构建DataGridStyle以应用于所有模块中的所有DataGrid。风格添加在列头过滤器文本框中,我用MVVM光EventToCommand触发TextChanged事件时,文本框中的文本改变这样的:(此代码DataGridStyle资源字典中存在)WPF-MVVM:从DataGrid风格的Handeling事件
<TextBox x:Name="filterTextBox"
HorizontalAlignment="Right" MinWidth="25" Height="Auto"
OpacityMask="Black" Visibility="Collapsed"
Text=""
TextWrapping="Wrap" Grid.Column="0" Grid.ColumnSpan="1">
<i:Interaction.Triggers>
<i:EventTrigger EventName="TextChanged">
<cmd:EventToCommand Command="{Binding DataContext.TextChangedCommand}"
PassEventArgsToCommand="True"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</TextBox>
然后我处理在视图模型的TextChangedCommand(与查看包含数据网格)使用附加属性:
#region TextChangedCommand----------------------------------------------------------------------------------------------
static ICommand command; //1
public static ICommand GetTextChangedCommand(DependencyObject obj)
{
return (ICommand)obj.GetValue(TextChangedCommandProperty);
}
public static void SetTextChangedCommand(DependencyObject obj, ICommand value)
{
obj.SetValue(TextChangedCommandProperty, value);
}
// Using a DependencyProperty as the backing store for TextChangedCommand. This enables animation, styling, binding, etc...
public static readonly DependencyProperty TextChangedCommandProperty =
DependencyProperty.RegisterAttached("TextChangedCommand",
typeof(ICommand),
typeof(SubsystemAllViewModel),
new UIPropertyMetadata(null, CommandChanged));
static void CommandChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
var fe = obj as FrameworkElement;
command = e.NewValue as ICommand;
fe.AddHandler(TextBox.TextChangedEvent, new TextChangedEventHandler(ExecuteCommand));
}
static void ExecuteCommand(object sender, TextChangedEventArgs e)
{
//Some Code
}
#endregion
和包含网格视图:
<DataGrid ItemsSource="{Binding Subsystems,Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
SelectedItem="{Binding Path=SelectedSubsystem, Mode=TwoWay}"
Name="SubsystemAllDataGrid"
Style="{StaticResource DataGridStyle}"
Grid.Row="2">
<DataGrid.Columns>
<DataGridTextColumn Header="Serial" Binding="{Binding Path=Serial, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="Type" Binding="{Binding Path=Type, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="System" Binding="{Binding Path=System, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="SubsystemNo" Binding="{Binding Path=SubsystemNo, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="Description" Binding="{Binding Path=Description, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="Scope" Binding="{Binding Path=Scope, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="Area" Binding="{Binding Path=Area, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="Priority" Binding="{Binding Path=Priority, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="DossierLocation" Binding="{Binding Path=DossierLocation, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="Parts" Binding="{Binding Path=Parts, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="Status" Binding="{Binding Path=Status, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="StatusDate" Binding="{Binding Path=StatusDate, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="MCDate" Binding="{Binding Path=MCDate, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="PlnMCDate" Binding="{Binding Path=PlnMCDate, Mode=TwoWay}"></DataGridTextColumn>
<DataGridTextColumn Header="Remark" Binding="{Binding Path=Remark, Mode=TwoWay}"></DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
的问题是: 当我在文本框中在数据网格中没有的列标题的一个输入过滤文本发生在以下几点打不破发点:
1 GetTextChangedCommand和SetTextChangedCommand
2 CommandChanged()方法。
我是wpf的新手,所以我确定在WPF或C#代码中存在错误...所以请帮我解决这些错误。
注意:我不使用代码。
在此先感谢
这似乎是一个MVVM光的特定问题。 –