WPF MVVM:如何将GridViewColumn绑定到视图模型集合？

<ListView ItemsSource="{Binding MyCollection}" IsSynchronizedWithCurrentItem="true">
  <ListView.View>
    <GridView>
      <GridViewColumn Header="Title" DisplayMemberBinding="{Binding Path=Title}"/>
      <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Path=Name}"/>
      <GridViewColumn Header="Phone" DisplayMemberBinding="{Binding Path=Phone}"/>
      <GridViewColumn Header="E-mail" DisplayMemberBinding="{Binding Path=EMail}"/>
    </GridView>
  </ListView.View>
</ListView>

public static class GridViewColumnCollection
    public static readonly DependencyProperty ColumnCollectionBehaviourProperty =
        DependencyProperty.RegisterAttached("ColumnCollectionBehaviour", typeof(GridViewColumnCollectionBehaviour), typeof(GridViewColumnCollection), new UIPropertyMetadata(null));
    public static readonly DependencyProperty ColumnsSourceProperty =
        DependencyProperty.RegisterAttached("ColumnsSource", typeof(object), typeof(GridViewColumnCollection), new UIPropertyMetadata(null, GridViewColumnCollection.ColumnsSourceChanged));
    public static readonly DependencyProperty DisplayMemberFormatMemberProperty =
        DependencyProperty.RegisterAttached("DisplayMemberFormatMember", typeof(string), typeof(GridViewColumnCollection), new UIPropertyMetadata(null, GridViewColumnCollection.DisplayMemberFormatMemberChanged));
    public static readonly DependencyProperty DisplayMemberMemberProperty =
        DependencyProperty.RegisterAttached("DisplayMemberMember", typeof(string), typeof(GridViewColumnCollection), new UIPropertyMetadata(null, GridViewColumnCollection.DisplayMemberMemberChanged));
    public static readonly DependencyProperty HeaderTextMemberProperty =
        DependencyProperty.RegisterAttached("HeaderTextMember", typeof(string), typeof(GridViewColumnCollection), new UIPropertyMetadata(null, GridViewColumnCollection.HeaderTextMemberChanged));
    public static readonly DependencyProperty WidthMemberProperty =
        DependencyProperty.RegisterAttached("WidthMember", typeof(string), typeof(GridViewColumnCollection), new UIPropertyMetadata(null, GridViewColumnCollection.WidthMemberChanged));
    [AttachedPropertyBrowsableForType(typeof(GridView))]
    public static GridViewColumnCollectionBehaviour GetColumnCollectionBehaviour(DependencyObject obj)
        return (GridViewColumnCollectionBehaviour)obj.GetValue(ColumnCollectionBehaviourProperty);
    public static void SetColumnCollectionBehaviour(DependencyObject obj, GridViewColumnCollectionBehaviour value)
        obj.SetValue(ColumnCollectionBehaviourProperty, value);
    [AttachedPropertyBrowsableForType(typeof(GridView))]
    public static object GetColumnsSource(DependencyObject obj)
        return (object)obj.GetValue(ColumnsSourceProperty);
    public static void SetColumnsSource(DependencyObject obj, object value)
        obj.SetValue(ColumnsSourceProperty, value);
    [AttachedPropertyBrowsableForType(typeof(GridView))]
    public static string GetDisplayMemberFormatMember(DependencyObject obj)
        return (string)obj.GetValue(DisplayMemberFormatMemberProperty);
    public static void SetDisplayMemberFormatMember(DependencyObject obj, string value)
        obj.SetValue(DisplayMemberFormatMemberProperty, value);
    [AttachedPropertyBrowsableForType(typeof(GridView))]
    public static string GetDisplayMemberMember(DependencyObject obj)
        return (string)obj.GetValue(DisplayMemberMemberProperty);
    public static void SetDisplayMemberMember(DependencyObject obj, string value)
        obj.SetValue(DisplayMemberMemberProperty, value);
    [AttachedPropertyBrowsableForType(typeof(GridView))]
    public static string GetHeaderTextMember(DependencyObject obj)
        return (string)obj.GetValue(HeaderTextMemberProperty);
    public static void SetHeaderTextMember(DependencyObject obj, string value)
        obj.SetValue(HeaderTextMemberProperty, value);
    [AttachedPropertyBrowsableForType(typeof(GridView))]
    public static string GetWidthMember(DependencyObject obj)
        return (string)obj.GetValue(WidthMemberProperty);
    public static void SetWidthMember(DependencyObject obj, string value)
        obj.SetValue(WidthMemberProperty, value);
    private static void ColumnsSourceChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        GridViewColumnCollection.GetOrCreateColumnCollectionBehaviour(sender).ColumnsSource = e.NewValue;
    private static void DisplayMemberFormatMemberChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        GridViewColumnCollection.GetOrCreateColumnCollectionBehaviour(sender).DisplayMemberFormatMember = e.NewValue as string;
    private static void DisplayMemberMemberChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        GridViewColumnCollection.GetOrCreateColumnCollectionBehaviour(sender).DisplayMemberMember = e.NewValue as string;
    private static void HeaderTextMemberChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        GridViewColumnCollection.GetOrCreateColumnCollectionBehaviour(sender).HeaderTextMember = e.NewValue as string;
    private static void WidthMemberChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        GridViewColumnCollection.GetOrCreateColumnCollectionBehaviour(sender).WidthMember = e.NewValue as string;
    private static GridViewColumnCollectionBehaviour GetOrCreateColumnCollectionBehaviour(DependencyObject source)
        GridViewColumnCollectionBehaviour behaviour = GetColumnCollectionBehaviour(source);
        if (behaviour == null)
            GridView typedSource = source as GridView;
            if (typedSource == null)
                throw new Exception("This property can only be set on controls deriving GridView");
            behaviour = new GridViewColumnCollectionBehaviour(typedSource);
            SetColumnCollectionBehaviour(typedSource, behaviour);
        return behaviour;
}

public class GridViewColumnCollectionBehaviour
    private object columnsSource;
    private GridView gridView;
    public GridViewColumnCollectionBehaviour(GridView gridView)
        this.gridView = gridView;
    public object ColumnsSource
        get { return this.columnsSource; }
            object oldValue = this.columnsSource;
            this.columnsSource = value;
            this.ColumnsSourceChanged(oldValue, this.columnsSource);
    public string DisplayMemberFormatMember { get; set; }
    public string DisplayMemberMember { get; set; }
    public string HeaderTextMember { get; set; }
    public string WidthMember { get; set; }
    private void AddHandlers(ICollectionView collectionView)
        collectionView.CollectionChanged += this.ColumnsSource_CollectionChanged;
    private void ColumnsSource_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        ICollectionView view = sender as ICollectionView;
        if (this.gridView == null)
            return;
        switch (e.Action)
            case NotifyCollectionChangedAction.Add:
                for (int i = 0; i < e.NewItems.Count; i++)
                    GridViewColumn column = CreateColumn(e.NewItems[i]);
                    gridView.Columns.Insert(e.NewStartingIndex + i, column);
                break;
            case NotifyCollectionChangedAction.Move:
                List<GridViewColumn> columns = new List<GridViewColumn>();
                for (int i = 0; i < e.OldItems.Count; i++)
                    GridViewColumn column = gridView.Columns[e.OldStartingIndex + i];
                    columns.Add(column);
                for (int i = 0; i < e.NewItems.Count; i++)
                    GridViewColumn column = columns[i];
                    gridView.Columns.Insert(e.NewStartingIndex + i, column);
                break;
            case NotifyCollectionChangedAction.Remove:
                for (int i = 0; i < e.OldItems.Count; i++)
                    gridView.Columns.RemoveAt(e.OldStartingIndex);
                break;
            case NotifyCollectionChangedAction.Replace:
                for (int i = 0; i < e.NewItems.Count; i++)
                    GridViewColumn column = CreateColumn(e.NewItems[i]);
                    gridView.Columns[e.NewStartingIndex + i] = column;
                break;
            case NotifyCollectionChangedAction.Reset:
                gridView.Columns.Clear();
                CreateColumns(sender as ICollectionView);
                break;
            default:
                break;
    private void ColumnsSourceChanged(object oldValue, object newValue)
        if (this.gridView != null)
            gridView.Columns.Clear();
            if (oldValue != null)
                ICollectionView view = CollectionViewSource.GetDefaultView(oldValue);
                if (view != null)
                    this.RemoveHandlers(view);
            if (newValue != null)
                ICollectionView view = CollectionViewSource.GetDefaultView(newValue);
                if (view != null)
                    this.AddHandlers(view);
                    this.CreateColumns(view);
    private GridViewColumn CreateColumn(object columnSource)
        GridViewColumn column = new GridViewColumn();
        if (!string.IsNullOrEmpty(this.HeaderTextMember))
            column.Header = GetPropertyValue(columnSource, this.HeaderTextMember);
        if (!string.IsNullOrEmpty(this.DisplayMemberMember))
            string propertyName = GetPropertyValue(columnSource, this.DisplayMemberMember) as string;
            string format = null;
            if (!string.IsNullOrEmpty(this.DisplayMemberFormatMember))
                format = GetPropertyValue(columnSource, this.DisplayMemberFormatMember) as string;
            if (string.IsNullOrEmpty(format))
                format = "{0}";
            column.DisplayMemberBinding = new Binding(propertyName) { StringFormat = format };
        if (!string.IsNullOrEmpty(this.WidthMember))
            double width = (double)GetPropertyValue(columnSource, this.WidthMember);
            column.Width = width;
        return column;
    private void CreateColumns(ICollectionView collectionView)
        foreach (object item in collectionView)
            GridViewColumn column = this.CreateColumn(item);
            this.gridView.Columns.Add(column);
    private object GetPropertyValue(object obj, string propertyName)
        object returnVal = null;
        if (obj != null)
            PropertyInfo prop = obj.GetType().GetProperty(propertyName);
            if (prop != null)
                returnVal = prop.GetValue(obj, null);
        return returnVal;

WPF MVVM:如何将GridViewColumn绑定到视图模型集合？

2 个回答