MVVM中的存储库模式 - WPF [英] Repository pattern in MVVM - WPF

问题描述

我在WPF中使用Entity Framework 6。我已经创建了一个Repository，它将实体列表返回给Viewmodel。因为我需要将这些列表绑定到DataGrid，所以我将它们转换为ObservableCollection。需要这样做，以便EF6的更改跟踪器可以检测所做的更改，当我在UnitOfWork上调用Save（）时，更改将保存到数据库中。怎么办呢？



我尝试过：



我在ViewModel中填充我的observablecollection，如下所示：

I am using Entity Framework 6 in WPF. I have already created a Repository which returns list of entities to the Viewmodel. Since I need to bind these lists to the DataGrid, I have converted these to ObservableCollection. It needs to be done so that the change tracker of EF6 can detect the changes made, and when I call Save() on UnitOfWork, the changes are saved to the database. How can that be done?

What I have tried:

I am populating my observablecollection in ViewModel like this:

ObservableCollection<items> TestCollection = new ObservableCollection<items>(UnitOfWork.Items.GetAll());

现在，如果我向TestCollection添加任何项目然后调用

Now, if I add any item to TestCollection and then call

UnitofWork.Complete()

常识指示该项目不会添加到数据库中。当然，它不是。

common sense dictates that the item would not be added to the database. And of course, it isn't.

推荐答案

谷歌搜索： wpf c＃mvvm实体框架绑定 - Google搜索 [ ^ ]有一些可以回答有关DataGrid EF绑定的问题的链接：



* 基本WPF教程 - 使用实体框架的MVVM项目 - 代码项目 [ ^ ]



* Windows实体框架MVVM遍历C＃中的1个示例，Visual Studio 2013的XAML [ ^ ]

Google Search: wpf c# mvvm entity framework binding - Google Search[^] has a number of links that can answer your question regarding the DataGrid EF binding:

* Tutorial for a Basic WPF – MVVM Project Using Entity Framework - Code Project[^]

* Windows Entity Framework MVVM Walk Through 1 sample in C#, XAML for Visual Studio 2013[^]

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