ASP.Net MVC您从哪里将实体转换为ViewModel? [英] ASP.Net MVC Where do you convert from Entities to ViewModels?

问题描述

标题几乎可以解释所有这一切，这是我要在我们的项目中尝试的最后一件事.我们的服务库结构如此，其中包含类似的功能.

Title pretty much explains it all, its the last thing I'm trying to work into our project. We are structured with a Service Library which contains a function like so.

        /// <summary>
        /// Returns a single category based on the specified ID.
        /// </summary>
        public Category GetCategory(int CategoryID)
        {
            var RetVal = _session.Single<Category>(x => x.ID == CategoryID);
            return RetVal;
        }

现在Category是一个实体(我们正在使用Entity Framework)，我们需要将其转换为CategoryViewModel.

Now Category is a Entity (We are using Entity Framework) we need to convert that to a CategoryViewModel.

现在，人们将如何组织这一结构?您确定服务函数返回了CategoryViewModel吗?控制器是否已从服务中提取数据，然后调用另一个函数将其转换为视图模型?

Now, how would people structure this? Would you make sure the service function returned a CategoryViewModel? Have the controller pull the data from the service then call another function to covnert to a view model?

推荐答案

以下是在这种情况下，相应的视图被严格键入为 IEnumerable< UserViewModel> .它使用 AutoMapper 定义实体和视图模型之间的转换规则.至于 [AutoMap] 属性，它是一个自定义操作过滤器，它检查传递给视图的模型并应用适当的转换，以便视图仅包含视图模型.

In this case the corresponding view is strongly typed to IEnumerable<UserViewModel>. It uses AutoMapper to define conversion rules between entities and view models. As for the [AutoMap] attribute, it's a custom action filter which inspects the model passed to the view and applies the proper conversion so that the view has only the view model.

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