WPF Datagrid：将SelectedCells绑定到我的ViewModel的MVVM友好的方式

问题描述

我正在使用WPF数据网格，并且有SelectionUnit =Cell和SelectionMode =Extended。我也试图尽可能多地遵守MVVM主体。

我需要我的ViewModel跟踪当前的SelectedCells。

如果我可以将其SelectedCells属性绑定到我的ViewModel，那么生活会很简单。奇怪的是，SelectedCells只提出一次 - 当我们首先选择网格中的任何单元格。

MS在这里解释：

任何人都可以想到一个MVVM友好的方法来解决它？

谢谢！

解决方案

我意识到我的最后一个答案是SelectedItems而不是SelectedCells，所以我写了完成附加的属性类，为多个SelectedCells进行数据绑定，工作如下：

 < controls：DataGrid ItemsSource ={StaticResource list}
 SelectionMode =扩展
主题：DataGridHelper.SelectedCells ={Binding Path = myViewModelSourceList，Mode = TwoWay，UpdateSourceTrigger = PropertyChanged} 
 
 /> 
  

我有一个工作的源代码和一个演示项目。

I'm using the WPF datagrid, and have SelectionUnit="Cell" and SelectionMode="Extended". I'm also trying to adhere to the MVVM principals as much as I can.

I need my ViewModel to keep track of the current SelectedCells.

Life would be easy if I could just Bind its SelectedCells property to my ViewModel. Oddly enough, SelectedCells is only raised once - when we first select any cell in the grid.

MS explains it here: http://social.msdn.microsoft.com/Forums/en/wpf/thread/737117f4-6d20-4232-88cf-e52cc44d4431

Can anyone think of an MVVM-friendly approach to get around it?

Thanks!

解决方案

I realized my last answer was for SelectedItems instead of SelectedCells, so I wrote a complete attached property class to do data binding for multiple SelectedCells which works as follows:

 <controls:DataGrid ItemsSource="{StaticResource list}"
                      SelectionMode="Extended"
                      themes:DataGridHelper.SelectedCells="{Binding Path=myViewModelSourceList, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"                                                      

                      />        

I have a working source code and a demo project of it here.

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