当有实体框架时，我们仍然需要bindingsource [英] do we still need bindingsource when there is entity framework

问题描述

实体框架在基础数据源和UI控件之间起着ORM的作用，我想知道我们还需要在EF之上使用bindingsource吗？

例如
我可以绑定

  datagridview.DataSource = entity.getdata（）; 
  

而不是

 code> bindingsource.DataSource = entity.etdata（）; 
 this.datagridview.DataSource = this.bindingsource; 
  

解决方案

显然，您可以直接将Gridview的数据源绑定到实体结果。

但是以下情况如何：

1. 将多个控件附加到同一数据源，例如列表+细节


2. 通过数据源导航代码隐藏。
   
   可以使用丑陋CurrencyManager完成，但是通过绑定源更好更好的

更多这里 bindingsource MSDN中的备注部分

entity framework plays a role as ORM in between the underlying datasource and UI controls, i'm wondering do we still need to use bindingsource on top of EF?

e.g. can i just bind

datagridview.DataSource = entity.getdata();

instead of

bindingsource.DataSource = entity.etdata();
this.datagridview.DataSource = this.bindingsource;

解决方案

Obviously you can directly bind the datasource of the Gridview to the entity result.
But what about following scenarios:

1. Having multiple controls attaching to the same datasource, e.g. List+Detail
2. Navigating in code-behind through the datasource.
   Can be done using "ugly" CurrencyManager but is much nicer through the bindingsource

More here bindingsource "Remarks" section in MSDN

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