在M-V-VM中使用IDataErrorInfo

问题描述

如果我的域对象实现了IDataErrorInfo，并且我正在使用M-V-VM，如何将错误通过ViewModel传播到视图中?如果我直接绑定到模型，则在绑定时将"ValidateOnExceptons"和"ValidateOnErrors"属性设置为true.但是我的ViewModel没有实现IDataErrorInfo.只有我的模特.我该怎么办?

If my domain objects implement IDataErrorInfo, and I am using M-V-VM, how do I propagate errors through the ViewModel into the View? If i was binding directly to the model, I would set the "ValidateOnExceptons" and "ValidateOnErrors" properties to true on my binding. But my ViewModel doesn't implement IDataErrorInfo. Only my model. What do I do?

说明我正在处理在域对象中实现IDataErrorInfo的现有代码库.我不能只在我的视图模型中实现IDataErrorInfo.

ClarificationI am dealing with an existing codebase that implements IDataErrorInfo in the domain objects. I can't just implement IDataErrorInfo in the my view model.

推荐答案

您还可以在VM中实现IDataErrorInfo，并将对VM的调用路由到相应的域对象.我认为这是不将域对象直接暴露给视图的唯一方法.

You can implement IDataErrorInfo additionally in your VM and route the calls to the VM to your corresponding domain objects. I think this is the only way without exposing domain objects directly to the view.

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