wpf MVVM中的多个DataContext？

Question

我有一个窗口,我想绑定来自2个不同的DataModel的数据上下文.我遇到过这篇文章: WPF将多个控件绑定到不同的datacontexts,并且它在我的代码中不起作用.我不知道你是否必须设置一个类的"新"实例才能使它工作,但我不能让它显示我的数据.这是一个样本

<Grid>
    <Button Command="{Binding FurnaceDataViewModel.StartButtonCommand}"/>
    <Button Command="{Binding FurnaceDataViewModel.StopButtonCommand}"/>
    <Button Command="{Binding FurnaceDataViewModel.ClearButtonCommand}"/>

    <Label Content="{Binding FurnaceDataModel.TotalTimeIdle}" />
    <Label Content="{Binding FurnaceDataModel.GallonsUsed}" />
    <Label Content="{Binding FurnaceDataModel.TotalMoney}" />
    <Label Content="{Binding FurnaceDataModel.TotalTimeRun}" />       

</Grid>

我有我的MainWindow类:

FurnaceDataContext dataContext = new FurnaceDataContext();
InitializeComponent();
DataContext = dataContext;

这是我的DataContext类

class FurnaceDataContext
{
    public FurnaceDataViewModel FurnaceDataViewModel { get; set; }
    public FurnaceDataModel FurnaceDataModel { get; set; }
    public SqlDataModel SqlDataModel { get; set; }
}

我无法正确显示我的文本或我的按钮命令.有任何想法吗？

Answer 1

你需要实例化内部道具....

    FurnaceDataContext dataContext = new FurnaceDataContext();

    dataContext.FurnaceDataViewModel  = new FurnaceDataViewModel();
    dataContext.FurnaceDataModel = new FurnaceDataModel();

    DataContext = dataContext;