ASP.NET MVC：如何保持一个字段字节[] [英] ASP.NET MVC: How do I keep a field byte[]

问题描述

我有一个字段，其类型为byte []。此字段将握住我的实体的财产RecordVersion（数据库中的时间戳）。如何保持这一领域，这样，当我救我的实体它是可用？

I've got a field which its type is byte[]. This field will hold my entity's RecordVersion property (timestamp in the database). How do I keep this field so that when I save my entity it is available?

我试过两个不同的东西，至今都没有成功：
这使得System.Byte []

I've tried two different things and haven't succeeded so far: This renders "System.Byte[]":

<%= Html.Hidden("RecordVersion", Model.RecordVersion.ToString()) %>

这将引发ModelStateError其中类型不能转换：

This throws a ModelStateError where the type couldn't be converted:

ViewData["RecordVersion"] = entity.RecordVersion

显然，默认MVC的机制，它绑定/解除绑定不喜欢多字节[]字段.....

Apparently the default MVC's mechanism that does the bind/unbind doesn't like much byte[] fields .....

推荐答案

您需要做一个模型绑定器，并进行注册。

You need to make a modelbinder and register it.

这<一个href=\"http://stephenwalther.com/blog/archive/2009/02/25/asp.net-mvc-tip-49-use-the-linqbinarymodelbinder-in-your.aspx\"相对=nofollow>文章展示了如何在一个隐藏字段使用时间戳从LINQ的数据库就像你在做什么。

This article shows how to use a timestamp from a linq database in a hidden field much like what you are doing.

 ModelBinders.Binders.Add(typeof(Binary), new LinqBinaryModelBinder());

在Global.asax中进行注册。

In global.asax to register it.

这LinqBinaryModelBinder是在期货大会。如果你想用户字节[]你必须自己写一个。

That LinqBinaryModelBinder is in the futures assembly. If you want to user byte[] you'll have to write one yourself.

这篇关于ASP.NET MVC：如何保持一个字段字节[]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！