Question

获得当前正在通过数据网格显示的对象列表。我需要做的是，当用户双击指定的行时，它将打开另一个窗口，该窗口是一个模型，显示与当前所选行的对象关联的数据。我不知道如何a）检测用户双击的时间，以及b）如何知道用户双击的行。

XAML：

    <DataGrid x:Name="BlueprintsDataGrid" Grid.Row="0" IsReadOnly="True" 
              ItemsSource="{Binding Path=Game.Blueprints, ElementName=uc}" 
              AutoGenerateColumns="False">
        <DataGrid.Columns>
            <DataGridTextColumn Header="Name" Width="80*" Binding="{Binding Name}"/>
            <DataGridTextColumn Header="ME" Width="30*" Binding="{Binding MaterialEfficiency}"
                                HeaderStyle="{StaticResource HeaderRightJustify}"
                                CellStyle="{StaticResource ColumnRight}"/>
            <DataGridCheckBoxColumn Header="BPO" Width="30*" Binding="{Binding IsOrginial}"
                                    HeaderStyle="{StaticResource HeaderRightJustify}"/>
        </DataGrid.Columns>
    </DataGrid>

Answer 1

您可以执行以下操作：

<DataGrid x:Name="BlueprintsDataGrid" Grid.Row="0" IsReadOnly="True" 
              ItemsSource="{Binding Path=Game.Blueprints, ElementName=uc}" 
              SelectedItem="{Binding CurrentSelection}"
              AutoGenerateColumns="False">
        <DataGrid.Columns>
            <DataGridTextColumn Header="Name" Width="80*" Binding="{Binding Name}"/>
            <DataGridTextColumn Header="ME" Width="30*" Binding="{Binding MaterialEfficiency}"
                                HeaderStyle="{StaticResource HeaderRightJustify}"
                                CellStyle="{StaticResource ColumnRight}"/>
            <DataGridCheckBoxColumn Header="BPO" Width="30*" Binding="{Binding IsOrginial}"
                                    HeaderStyle="{StaticResource HeaderRightJustify}"/>
        </DataGrid.Columns>
    </DataGrid>

注意： CurrentSelection 必须存在于ViewModel类中。此属性必须实现INotifyPropertyChanged接口，并且必须是 ItemsSource 持有的对象类型！

要识别鼠标双击，可以将上述xaml扩展为类似

 <DataGrid x:Name="BlueprintsDataGrid" Grid.Row="0" IsReadOnly="True" 
              ItemsSource="{Binding Path=Game.Blueprints, ElementName=uc}" 
              SelectedItem="{Binding CurrentSelection}"
              AutoGenerateColumns="False">
 <i:Interaction.Triggers>
            <i:EventTrigger EventName="MouseDoubleClick">
                <i:InvokeCommandAction Command="{Binding DoubleClickedCommand}"/>
            </i:EventTrigger>
        </i:Interaction.Triggers>
        <DataGrid.Columns>
            <DataGridTextColumn Header="Name" Width="80*" Binding="{Binding Name}"/>
            <DataGridTextColumn Header="ME" Width="30*" Binding="{Binding MaterialEfficiency}"
                                HeaderStyle="{StaticResource HeaderRightJustify}"
                                CellStyle="{StaticResource ColumnRight}"/>
            <DataGridCheckBoxColumn Header="BPO" Width="30*" Binding="{Binding IsOrginial}"
                                    HeaderStyle="{StaticResource HeaderRightJustify}"/>
        </DataGrid.Columns>
    </DataGrid>

注意：因此，您在ViewModel中需要ICommand类型的属性DoubleClickedCommand。在那里，您可以检查您的CurrentSelection。

public ICommand DoubleClickedCommand { get; set; }

在您的ViewModel构造函数中：

DoubleClickedCommand = new RelayCommand(DoubleClick);

方法本身：

private void DoubleClick()
{
    if(CurrentSelection == null) { return; }
    // Do stuff in here            
}

Answer 2

您可以处理MouseDoubleClick事件并投射事件源的DataContext：

private void OnMouseDoubleClick(object sender, MouseButtonEventArgs e)
{
    var fe = e.OriginalSource as FrameworkElement;
    if (fe != null)
    {
        var blueprint = fe.DataContext as BluePrint;
        if (blueprint != null)
        {
            //open window...
        }
    }
}

XAML：

<DataGrid x:Name="BlueprintsDataGrid" Grid.Row="0" IsReadOnly="True" 
          ItemsSource="{Binding Path=Game.Blueprints, ElementName=uc}" 
          AutoGenerateColumns="False"
          MouseDoubleClick="Dgm_MouseDoubleClick">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Name" Width="80*" Binding="{Binding Name}"/>
        <DataGridTextColumn Header="ME" Width="30*" Binding="{Binding MaterialEfficiency}"
                            HeaderStyle="{StaticResource HeaderRightJustify}"
                            CellStyle="{StaticResource ColumnRight}"/>
        <DataGridCheckBoxColumn Header="BPO" Width="30*" Binding="{Binding IsOrginial}"
                                HeaderStyle="{StaticResource HeaderRightJustify}"/>
    </DataGrid.Columns>
</DataGrid>

将BluePrint更改为您的班级名称。

选择行与该行关联的数据后，WPF Datagrid会执行操作

2 个答案: