双向绑定ObservableCollection< string>到WPF DataGrid

问题描述

我已经在这个问题上解决了不同的事情/阅读了一段时间，还没有找到答案。希望你们可以帮忙。

我有一个可观察的类型字符串的集合。我想绑定这个集合到一个datagrid，并能够编辑/删除/添加到集合。这是我的xaml：

 < DataGrid ItemsSource ={Binding Movies.Titles}CanUserDeleteRows =TrueCanUserAddRows = TrueHeight =300> 
< DataGrid.Columns> 
< DataGridTextColumn Binding ={Binding Path = DataContext，RelativeSource = {RelativeSource Self}}/> 
< /DataGrid.Columns> 
< / DataGrid> 
  

同样的observablecollection也绑定到一个列表框。我想使用datagrid方法（上图）编辑该集合，并查看列表框中的更改/编辑。删除/添加工作正常，但是当我在网格单元格中编辑字符串并失去焦点时，字符串将返回到原来的位置，并且不会被更新。

非常感谢任何帮助/建议。

解决方案

哇，昨天我去做这个事情，被卡住了一个DataGrid这将为我的ObservableCollection添加一个新行。经过研究，我意识到为什么。字符串和不变。

我发现这个问题，不幸的是没有答案。所以我不能留下这个空白的答案。

所以这里是我找到的答案：

1. DataGrid无法通过添加，编辑或删除字符串来更新字符串集。




2. 我发现了一个解决方法来包装StringWrapper对象中的字符串。这里是。

   
   
   

   public class StringWrapper
   {
   public string Text {get;组;
   }

我不喜欢任何答案。

原来的问题提问者moncadad看起来像是要一列DataGrid。他可能只是想添加和删除一个ObservableCollection中的字符串，而不需要很多代码。编辑可能不是太重要，因为可以通过删除和添加再次完成。

最后我自己做了一个可重用的用户控件，我称之为StringListBox。 p>

基本上，想法是创建一个DataGrid的外观Label，一个ListBox，一个TextBox和一个Add按钮，因为这是一个控件，它必须在一个控件中使用ObservableObject或List。

这给你添加和删除。我不提供编辑。

希望这有助于下一个人。

I've been tying different things / reading up on this issue for awhile now and have not yet found an answer. Hopefully you guys can help.

I have an observablecollection of type string. I want to bind this collection to a datagrid and be able to edit/delete/add to the collection. Here is my xaml:

<DataGrid ItemsSource="{Binding Movies.Titles}"  CanUserDeleteRows="True" CanUserAddRows="True" Height="300">
    <DataGrid.Columns>
        <DataGridTextColumn Binding="{Binding Path=DataContext, RelativeSource={RelativeSource Self}}"/>
    </DataGrid.Columns>
</DataGrid>

The same observablecollection is also bound to a listbox. I want to be able to edit the collection using the datagrid method (above) and see the changes/edits in the listbox. The delete/add is working correctly, but when I edit a string inside a grid cell and it loses focus, the string goes back to what it originally was and never gets updated.

Thanks a lot for any help / suggestions.

解决方案

Wow, I went to do this yesterday and was stuck with a DataGrid that would add a new line for my ObservableCollection. After research, I realized why. Strings and immutable.

I found this question and unfortunately it didn't have an answer. So I can't leave this empty of an answer.

So here are the answers I found:

1. DataGrid cannot update a string collection by adding, editing, or removing strings.

2. I found a workaround to wrap the string in a StringWrapper object. Here it is.

   public class StringWrapper{ public string Text { get; set; }}

I didn't like either answer.

The original question asker, moncadad, looks like he wants a one column DataGrid. He probably just wants to add and remove strings from an ObservableCollection without a lot of code. Edit probably isn't too important since that can be done by delete and add again.

I ended up doing this myself with a reusable usercontrol I made called StringListBox.

A ListBox for strings that supports add and delete

Basically the idea is to create the look of a DataGrid with a Label, a ListBox, a TextBox and an Add button and since this is a control, it has to work with ObservableObject or List in one control.

This give you Add and Delete. I doesn't provide edit.

Hope this helps the next guy.

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