WPF DataGrid MVVM 绑定 SelectedCells

首先增加一个附加属性类

DataGridSelectedCellsBehavior

    public class DataGridSelectedCellsBehavior{public static IList<DataGridCellInfo> GetSelectedCells(DependencyObject obj){return (IList<DataGridCellInfo>)obj.GetValue(SelectedCellsProperty);}public static void SetSelectedCells(DependencyObject obj, IList<DataGridCellInfo> value){obj.SetValue(SelectedCellsProperty, value);}public static readonly DependencyProperty SelectedCellsProperty = DependencyProperty.RegisterAttached("SelectedCells", typeof(IList<DataGridCellInfo>), typeof(DataGridSelectedCellsBehavior), new UIPropertyMetadata(null, OnSelectedCellsChanged));static SelectedCellsChangedEventHandler GetSelectionChangedHandler(DependencyObject obj){return (SelectedCellsChangedEventHandler)obj.GetValue(SelectionChangedHandlerProperty);}static void SetSelectionChangedHandler(DependencyObject obj, SelectedCellsChangedEventHandler value){obj.SetValue(SelectionChangedHandlerProperty, value);}static readonly DependencyProperty SelectionChangedHandlerProperty = DependencyProperty.RegisterAttached("SelectedCellsChangedEventHandler", typeof(SelectedCellsChangedEventHandler), typeof(DataGridSelectedCellsBehavior), new UIPropertyMetadata(null));//d is MultiSelector (d as ListBox not supported)static void OnSelectedCellsChanged(DependencyObject d, DependencyPropertyChangedEventArgs args){if (GetSelectionChangedHandler(d) != null)return;if (d is DataGrid)//DataGrid{DataGrid datagrid = d as DataGrid;SelectedCellsChangedEventHandler selectionchanged = null;foreach (var selected in GetSelectedCells(d) as IList<DataGridCellInfo>)datagrid.SelectedCells.Add(selected);selectionchanged = (sender, e) =>{SetSelectedCells(d, datagrid.SelectedCells);};SetSelectionChangedHandler(d, selectionchanged);datagrid.SelectedCellsChanged += GetSelectionChangedHandler(d);}}}

界面

Help:DataGridSelectedCellsBehavior.SelectedCells="{Binding Path=SelectedGridCellCollection, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

   <DataGrid  x:Name="WeekDataGrid" ItemsSource="{Binding Data}" ScrollViewer.VerticalScrollBarVisibility="Hidden"
ScrollViewer.HorizontalScrollBarVisibility="Hidden"   HeadersVisibility="Column" CanUserDeleteRows="False" CanUserAddRows="False" AutoGenerateColumns="False" IsReadOnly="True" CanUserResizeColumns="False" CanUserReorderColumns="False"Background="White" GridLinesVisibility="All"  AlternationCount="4"  SelectionUnit="Cell" SelectionMode="Extended" Margin="0" Grid.Column="1" CellStyle="{DynamicResource DataGridCellStyle}"Help:DataGridSelectedCellsBehavior.SelectedCells="{Binding Path=SelectedGridCellCollection, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"><DataGrid.Columns><DataGridTemplateColumn Width="215" Visibility="Hidden" ><DataGridTemplateColumn.CellTemplate><DataTemplate><TextBlock Height="30"  Text="{Binding ID}" VerticalAlignment="Stretch"
HorizontalAlignment="Center"   /></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn><DataGridTemplateColumn Width="215" ><DataGridTemplateColumn.HeaderTemplate><DataTemplate><Grid Height="63"  Width="215"   ><TextBlock Text=" " HorizontalAlignment="Center" VerticalAlignment="Center" /></Grid></DataTemplate></DataGridTemplateColumn.HeaderTemplate><DataGridTemplateColumn.CellTemplate><DataTemplate><Grid Height="30"   Background="#00000000" ><local:DataTableItem Height="30"   Text="{Binding Sun}" VerticalAlignment="Center"></local:DataTableItem></Grid></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn><DataGridTemplateColumn Width="215" ><!--<DataGridTemplateColumn.HeaderTemplate><DataTemplate><Grid Height="60"  Width="215"><TextBlock Text="周一" HorizontalAlignment="Center" VerticalAlignment="Center" /></Grid></DataTemplate></DataGridTemplateColumn.HeaderTemplate>--><DataGridTemplateColumn.CellTemplate><DataTemplate><Grid Height="30"    Background="#00000000" ><local:DataTableItem x:Name="ItemMon" Height="30" Text="{Binding Mon}" VerticalAlignment="Center"><i:Interaction.Triggers><i:EventTrigger EventName="MouseRightButtonDown"><i:InvokeCommandAction Command="{Binding  DataContext.DataGridCellMouseRightClick,ElementName=WeekTimeControl}" CommandParameter="{Binding ElementName=ItemMon}"></i:InvokeCommandAction></i:EventTrigger></i:Interaction.Triggers></local:DataTableItem></Grid></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn><DataGridTemplateColumn Width="215" ><!--<DataGridTemplateColumn.HeaderTemplate><DataTemplate><Grid Height="60"><TextBlock Text="周二" HorizontalAlignment="Center" VerticalAlignment="Center" /></Grid></DataTemplate></DataGridTemplateColumn.HeaderTemplate>--><DataGridTemplateColumn.CellTemplate><DataTemplate><Grid Height="30"    Background="#00000000" ><local:DataTableItem Height="30" x:Name="ItemTue"  Text="{Binding Tue}" VerticalAlignment="Center"><i:Interaction.Triggers><i:EventTrigger EventName="MouseRightButtonDown"><i:InvokeCommandAction Command="{Binding  DataContext.DataGridCellMouseRightClick,ElementName=WeekTimeControl}" CommandParameter="{Binding ElementName=ItemTue}"></i:InvokeCommandAction></i:EventTrigger></i:Interaction.Triggers></local:DataTableItem></Grid></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn><DataGridTemplateColumn Width="215" ><!--<DataGridTemplateColumn.HeaderTemplate><DataTemplate><Grid Height="60"><TextBlock Text="周三" HorizontalAlignment="Center" VerticalAlignment="Center" /></Grid></DataTemplate></DataGridTemplateColumn.HeaderTemplate>--><DataGridTemplateColumn.CellTemplate><DataTemplate><Grid Height="30"   Background="#00000000" ><local:DataTableItem Height="30" x:Name="ItemWed"  Text="{Binding Wed}" VerticalAlignment="Center" ><i:Interaction.Triggers><i:EventTrigger EventName="MouseRightButtonDown"><i:InvokeCommandAction Command="{Binding  DataContext.DataGridCellMouseRightClick,ElementName=WeekTimeControl}" CommandParameter="{Binding ElementName=ItemWed}"></i:InvokeCommandAction></i:EventTrigger></i:Interaction.Triggers></local:DataTableItem></Grid></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn><DataGridTemplateColumn Width="215" ><!--<DataGridTemplateColumn.HeaderTemplate><DataTemplate><Grid Height="60"><TextBlock Text="周四" HorizontalAlignment="Center" VerticalAlignment="Center" /></Grid></DataTemplate></DataGridTemplateColumn.HeaderTemplate>--><DataGridTemplateColumn.CellTemplate><DataTemplate ><Grid Height="30"    Background="#00000000" ><local:DataTableItem Height="30" x:Name="ItemThu" Text="{Binding Thu}" VerticalAlignment="Center"><i:Interaction.Triggers><i:EventTrigger EventName="MouseRightButtonDown"><i:InvokeCommandAction Command="{Binding  DataContext.DataGridCellMouseRightClick,ElementName=WeekTimeControl}" CommandParameter="{Binding ElementName=ItemThu}"></i:InvokeCommandAction></i:EventTrigger></i:Interaction.Triggers></local:DataTableItem></Grid></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn><DataGridTemplateColumn Width="215"   ><!--<DataGridTemplateColumn.HeaderTemplate><DataTemplate><Grid Height="60"><TextBlock Text="周五" HorizontalAlignment="Center" VerticalAlignment="Center" /></Grid></DataTemplate></DataGridTemplateColumn.HeaderTemplate>--><DataGridTemplateColumn.CellTemplate><DataTemplate><Grid Height="30"   Background="#00000000" ><local:DataTableItem Height="30" x:Name="ItemFri"   Text="{Binding Fri}" VerticalAlignment="Center" HorizontalAlignment="Center"  ><i:Interaction.Triggers><i:EventTrigger EventName="MouseRightButtonDown"><i:InvokeCommandAction Command="{Binding  DataContext.DataGridCellMouseRightClick,ElementName=WeekTimeControl}" CommandParameter="{Binding ElementName=ItemFri}"></i:InvokeCommandAction></i:EventTrigger></i:Interaction.Triggers></local:DataTableItem></Grid></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn><DataGridTemplateColumn Width="215" ><!--<DataGridTemplateColumn.HeaderTemplate><DataTemplate><Grid Height="60"><TextBlock Text="周六" HorizontalAlignment="Center" VerticalAlignment="Center" /></Grid></DataTemplate></DataGridTemplateColumn.HeaderTemplate>--><DataGridTemplateColumn.CellTemplate><DataTemplate><Grid Height="30"    Background="#00000000" ><local:DataTableItem Height="30" x:Name="ItemSat" Text="{Binding Sat}" VerticalAlignment="Center" HorizontalAlignment="Center"><i:Interaction.Triggers><i:EventTrigger EventName="MouseRightButtonDown"><i:InvokeCommandAction Command="{Binding  DataContext.DataGridCellMouseRightClick,ElementName=WeekTimeControl}" CommandParameter="{Binding ElementName=ItemSat}"></i:InvokeCommandAction></i:EventTrigger></i:Interaction.Triggers></local:DataTableItem></Grid></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn></DataGrid.Columns></DataGrid>

ViewMode 绑定

private IList<DataGridCellInfo> selectedGridCellCollection = new List<DataGridCellInfo>();public IList<DataGridCellInfo> SelectedGridCellCollection{get { return selectedGridCellCollection; }set{selectedGridCellCollection = value;RaisePropertyChanged("SelectedGridCellCollection");}}

用过 SelectedGridCellCollection 就可以获得值了

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