如何在DataGrid中合并两个不同的可观察集合

问题描述：

我想合并下面的集合并使用CompositeCollection将其绑定到DataGrid。如何在DataGrid中合并两个不同的可观察集合

private ObservableCollection<LabelDataInfo> labelSource; 

    public ObservableCollection<LabelDataInfo> LabelSource 
    { 
     get { return labelSource; } 
     set { labelSource = value; } 
    } 
    private ObservableCollection<NumericalDataInfo> numericLabelSource; 

    public ObservableCollection<NumericalDataInfo> NumericLabelSource 
    { 
     get { return numericLabelSource; } 
     set { numericLabelSource = value; } 
    } 
    private CompositeCollection mergedSource; 

    public CompositeCollection MergedSource 
    { 
     get { return mergedSource; } 
     set { mergedSource = value; OnPropertyChanged("MergedSource"); } 
    } 

public MergedTargetDataInfo() 
    { 
     var labelInfo = new ObservableCollection<LabelDataInfo>(); 
     labelInfo.Add(new LabelDataInfo() { Title = "Title1", Label = "Label1" }); 
     labelInfo.Add(new LabelDataInfo() { Title = "Title2", Label = "Label2" }); 
     labelInfo.Add(new LabelDataInfo() { Title = "Title3", Label = "Label3" }); 

     LabelSource = labelInfo; 

     var numericInfo = new ObservableCollection<NumericalDataInfo>(); 
     numericInfo.Add(new NumericalDataInfo() { NumericTitle = "NumericTitle1", NumericLabel = "NLabel1" }); 
     numericInfo.Add(new NumericalDataInfo() { NumericTitle = "NumericTitle2", NumericLabel = "NLabel2" }); 
     numericInfo.Add(new NumericalDataInfo() { NumericTitle = "NumericTitle3", NumericLabel = "NLabel3" }); 
     NumericLabelSource = numericInfo; 


     mergedSource = new CompositeCollection(); 
     CollectionContainer collection1 = new CollectionContainer() { Collection = LabelSource }; 
     CollectionContainer collection2 = new CollectionContainer() { Collection = NumericLabelSource };   
     mergedSource.Add(collection1); 
     mergedSource.Add(collection2);   
    } 



<DataGrid ItemsSource="{Binding MergedSource}" AutoGenerateColumns="True"/>

但它显示为空网格。如何在wpf中合并Label和NumericLabelDataSource？如何在DataGrid控件中显示combosite集合。尝试绑定CompositeCollection时，DataGrid为空。

http://stackoverflow.com/questions/6446699/how-do-you-bind-a-collectioncontainer-to-a-collection-in- a-view-model – lerner1225

另一个示例：http://stackoverflow.com/q/19243109/109702尝试定义CompositeCollection，它是CollectionContainer项目的声明式而不是代码。 – slugster

如果我在猜测您的需求时没有错，您将无法通过'DataGrid'获得'CompositeCollection'所需的预期结果。 :) – Gopichandar

答

谢谢你们。

我已经实现了我的要求如下图所示，

<DataGrid AutoGenerateColumns="False"> 
     <DataGrid.ItemsSource> 
      <CompositeCollection> 
       <CollectionContainer Collection="{Binding Source={StaticResource viewModel}, Path=LabelSource}"/> 
       <CollectionContainer Collection="{Binding Source={StaticResource viewModel},Path=NumericLabelSource}"/> 
      </CompositeCollection> 
     </DataGrid.ItemsSource> 
     <DataGrid.Columns> 
      <DataGridTextColumn Binding="{Binding Title}"/> 
      <DataGridTextColumn Binding="{Binding Label}"/> 
     </DataGrid.Columns> 
    </DataGrid>

如何在DataGrid中合并两个不同的可观察集合

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