与单个视图关联的多个ViewModel [英] Multiple ViewModels associated with a single view

问题描述

我有一个显示DataGrid的视图，该视图绑定到ViewModel中的ObservableCollection.为了便于讨论，假设我们有一个Team视图，其中包含一个团队DataGrid，其中每一行代表一个Player.

I have a View that displays a DataGrid which is bound to an ObservableCollection in the ViewModel. For the sake of discussion, let's say we have a Team View containing a Team DataGrid, in which each row represents a Player.

我的问题是我应该使用哪种数据类型来表示Team集合中的玩家.集合中的项目本身就是ViewModels是一个好主意吗?在这种情况下，我的Team视图将与单个Team ViewModel以及任意数量的Player ViewModels(在Team集合中)相关联.

My question is about what data type I should use to represent the players in my Team collection. Is it a good idea for the items in the collection to be ViewModels themselves? In this case, my Team View would be associated with a single Team ViewModel as well as any number of Player ViewModels (in the Team collection).

具有与单个View关联的多个ViewModel是否违反MVVM的任何设计准则，并且有实现该方案的首选方法吗?

Does having multiple ViewModels associated with a single View violate any design guidelines for MVVM , and is there a preferred way of implementing this scenario?

谢谢！

推荐答案

不，这很好.每个对象本身应为ViewModel.这样可以使代码更简洁，交互效果更好，并记住，如果效果良好，那么它是正确的(即使它违反了准则).

No that is fine; each object should be a ViewModel in its own right. It makes for cleaner code, nicer interactions, and remember, if it works well then it's correct (even if it violates guidelines).

我会完全按照您的处方进行操作.我将网格绑定到Team，该网格将具有ObservableCollection<Player>，其中Player是另一个ViewModel类型的类.每个行项目都将Player作为其DataContext，因此您仍按预期绑定到ViewModel属性:并且Player对于ICommand仍可以具有public属性(可能是RelayCommands)进行操纵！

I would do it exactly the way you are prescribing. I'd bind my grid to a Team, which would have an ObservableCollection<Player>, where Player is another ViewModel-type class. Each row item would get the Player as its DataContext and so you're still binding to ViewModel properties as you'd expect: and Player can still have public properties for ICommands (likely RelayCommands) for manipulation!

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