你如何忽略/坚持MVC值时，您的视图模型不具备的许多领域为您的域模型？ [英] How do you ignore/persist values in MVC when your view-model doesn't have as many fields as your domain model?

问题描述

我有我使用fluentNhibernate和Asp.net MVC，其中一个站点。我有一个编辑视图，允许用户编辑10属性的记录（对象）8。当您提交的形式和模型结合，两者不可编辑的字段回来视图模型为空字符串或默认DateTime值取决于属性的类型。

I have a site where I'm using fluentNhibernate and Asp.net MVC. I have an Edit view that allows user to edit 8 of the 10 properties for that record (object). When you submit the form and the Model binds, the two un-editable fields come back in the view-model as Empty strings or as default DateTime values depending on the type of property.

由于我还使用AutoMapper映射我的视图模型我的域实体，我不能只是从数据库中加载我的对象的新副本并手动设置2缺少的属性。最新最好的办法是坚持，我不想编辑这些领域？

Because I'm also using AutoMapper to map my view-model to my Domain Entity, I cannot just load a fresh copy of my object from the database and manually set the 2 missing properties. Whats the best way to persist those fields that I don't want edited?

这是确实可行的方法之一是坚持我在查看隐藏的输入字段中的值。这工作，但感觉恶心。我AP preciate任何建议。有没有在我的AutoMapper的方式来配置此需要的功能？

One way that does work is to persist the values in hidden Input fields on my View. That works but feels gross. I appreciate any recommendations. Is there a way in my AutoMapper to configure this desired functionality?

更新：
好了，我想我不是要忽视领域，我想确保我不会坚持null或空字符串值。忽略AutoMapper领域做到了这一点，它们都被忽略，并且是空的，当我试图映射之前保存到我的仓库。

UPDATE: Ok, So I guess I'm not trying to ignore the fields, I'm trying to make sure that I don't persist null or empty string values. Ignoring the fields in AutoMapper does just that, they get ignored and are null when I attempt to map them before Saved to my repository.

推荐答案

在asp.net mvc的DefaultModelBinder是可扩展的，并且可以重写它来创建自己的绑定模式。但是，这将涉及超过两个隐藏的输入域，这在我的角度来看，是不是总更多的工作。

The asp.net mvc DefaultModelBinder is extensible, and you can override it to create your own binding schema. But this will involve more work than two "hidden Input fields", which , in my point of view, is not that gross.

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