我可以在MVVM应用程序中的代码中执行此操作吗？ [英] Can I do this in code behind in a MVVM application?

问题描述

我对MVVM相对较新，似乎没有就.xaml.cs代码隐藏文件中是否允许某些代码达成共识，或者根本没有。我将非常感谢您对特定问题的指导：



我在MVVM模式中有一个Ribbon应用程序。功能区有6个选项卡，每个选项卡都有自己的命令集和 ViewModel 中自己的唯一类。功能区下方是 DataGrid ，它绑定到每个选项卡的不同 DataTable 。每个选项卡的 DataTable 都位于自己的类中。这意味着每次用户单击其他选项卡时， DataGrid 的 DataContext 必须更改。如果我在窗口的代码隐藏文件中更改 DataContext ，那么所有这些都很有效。您无法绑定到 DataContext ，因此您无法在 ViewModel中设置 DataContext ，至少不是我能想到的。



现在我的问题：允许在后面的代码中设置 DataGrid DataContext ，还是MVVM众神钉死我？

解决方案

不应在代码隐藏中设置DataContext。

将datagrid的源设置为集合。

I am relatively new with MVVM and there does not seem to be total consensus on whether some code is allowed in the .xaml.cs code behind file, or none at all. I will appreciate guidance with a specific problem:

I have a Ribbon application in the MVVM pattern. The ribbon has 6 tabs, each with its own set of commands and its own unique class in the ViewModel. Underneath the ribbon is a DataGrid that is bound to a different DataTable for each tab. The DataTable for each tab resides in its own class. This means the DataContext of the DataGrid must change each time the user clicks on a different tab. All of this works great, provided I change the DataContext in the window's code behind file. You cannot bind to the DataContext, so you cannot set the DataContext in the ViewModel, at least not as far as I could figure out.

Now my question: Is it permissible to set the DataGrid DataContext in code behind, or will the MVVM gods crucify me?

解决方案

No DataContext should not be set in the code-behind.
Set the datagrid's source to a collection.

这篇关于我可以在MVVM应用程序中的代码中执行此操作吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！