编辑后更新DataGrid [英] Update DataGrid after edited

问题描述

你好.
我正在使用DataGrid编辑和显示我的对象列表，如ItemsSource，List< TimeSegment> ;，我的对象如下所示:

Hello.
I''m using DataGrid to edit and display a list of my objects as ItemsSource, List<TimeSegment>, and my object looks like this:

public class TimeSegment
    {
        
        public DateTime StartTime
        public DateTime EndTime
        public TimeSpan Span
        {
            get
            {
                return this.EndTime - this.StartTime;
            }
        }
    }
}

计算跨度属性.

但是，在DataGrid中编辑StartTime或EndTime之后，Span列并不会自动更新.而且我也想在编辑后对列表进行排序.

我对此有一个解决方法，但是并不能很好地解决这个问题.

这是我的解决方法，首先我在RowEditEnding事件中设置一个标志，然后我对ItemsSourceProperty进行ClearBinding，对列表进行排序，并在检查该标志后将其绑定到CurrentCellChanged事件中.

我的第一个问题是 有更好的方法吗?" .

如果必须使用此解决方法，那么我会遇到另一个问题.

我想在List< TimeSegment>之后执行一些逻辑改变了.编辑后，它可以正常工作，但不能删除行.

我的第二个问题是 如何删除行?" .

我尝试将逻辑放入DataGrid.DeleteCommand的Executed事件处理程序中，但这将覆盖DataGrid的默认操作，该行未删除，我的逻辑得到执行.

The Span property is calculated.

But the Span column did not update automatically, after I edit the StartTime or EndTime in DataGrid. And I want to sort the list after editing too.

I have a work around about this, but it dose not solve this gracefully.

Here is my work around, first I set a flag in the RowEditEnding event, then I ClearBinding for ItemsSourceProperty , sort the list and rebind the property in the CurrentCellChanged event after checking the flag.

My first question is "Is there a better way to do this?".

If I have to use this work around, then I got another problem.

I want to do some logic after the List<TimeSegment> changed. It works fine after editing, but not with deleting row(s).

My second question is "How can I do with deleting row(s)?".

I tried putting the logic in the event handler of Executed of DataGrid.DeleteCommand, but this will override the default action of DataGrid, the row did not deleted, my logic get executed.

<DataGrid.CommandBindings>
   <CommandBinding Command="DataGrid.DeleteCommand" 
                   Executed="CommandBinding_Executed" />
</DataGrid.CommandBindings>

有人可以帮我吗?在此先感谢您.

Can somebody help me? Thanks in advance.

推荐答案

HI在您的类中实现INotifiyPropertyChange，并将您的datagrid与带有ObservableCollection<TimeSegment>的id绑定；对象

HI implement INotifiyPropertyChange in your class and bind your datagrid with an id with an ObservableCollection<TimeSegment>; object

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