blocks|key|1126539|text|它在表单上为您传递的字段(来自您的模型)创建一个隐藏输入。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1126540|它对于Model/ViewModel中的字段非常有用，因为您需要在页面上持久化这些字段，并在进行另一个调用时传回这些字段，但用户不应该看到这些字段。|1126541|考虑以下ViewModel类：|1126542|public+class+ViewModel
{
++++public+string+Value+{+get;+set;+}
++++public+int+Id+{+get;+set;+}
}|code-block|syntax|javascript|1126543|现在，您希望编辑页面存储ID，但不希望它被看到：|1126544|<%25+using(Html.BeginForm()+{+%25>
++++<%25=+Html.HiddenFor(model.Id)+%25><br+/>
++++<%25=+Html.TextBoxFor(model.Value)+%25>
<%25+}+%25>|1126545|这将产生与以下HTML等效的结果：|1126546|<form+name="form1">
++++<input+type="hidden"+name="Id">2</input>
++++<input+type="text"+name="Value"+value="Some+Text"+/>
</form>|1126547|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|Z|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|H|7|11|8|@]|9|@]|A|$I|J]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

It creates a hidden input on the form for the field (from your model) that you pass it.

It is useful for fields in your Model/ViewModel that you need to persist on the page and have passed back when another call is made but shouldn't be seen by the user.

Consider the following ViewModel class:

<pre><code>public class ViewModel
{
 public string Value { get; set; }
 public int Id { get; set; }
}
</code></pre>

Now you want the edit page to store the ID but have it not be seen:

<pre><code>&lt;% using(Html.BeginForm() { %&gt;
 &lt;%= Html.HiddenFor(model.Id) %&gt;&lt;br /&gt;
 &lt;%= Html.TextBoxFor(model.Value) %&gt;
&lt;% } %&gt;
</code></pre>

This results in the equivalent of the following HTML:

<pre><code>&lt;form name="form1"&gt;
 &lt;input type="hidden" name="Id"&gt;2&lt;/input&gt;
 &lt;input type="text" name="Value" value="Some Text" /&gt;
&lt;/form&gt;
</code></pre>

blocks|key|911566|text|并在Edit操作方法中使用隐藏的ID输入：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|911567|[HttpPost]
public+ActionResult+Edit(FormCollection+collection)
{
++++ViewModel.ID+=+Convert.ToInt32(collection["ID"]);
}|code-block|syntax|javascript|911568|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

And to consume the hidden ID input back on your Edit action method:

<pre><code>[HttpPost]
public ActionResult Edit(FormCollection collection)
{
 ViewModel.ID = Convert.ToInt32(collection["ID"]);
}
</code></pre>

blocks|key|1126616|text|剃刀代码@Html.Hidden或@Html.HiddenFor的用法与下面的代码类似|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1126617|+<input+type="hidden"/>|code-block|syntax|javascript|1126618|也可以参考下面的链接|1126619|https://msdn.microsoft.com/en-us/library/system.web.mvc.html.inputextensions.hiddenfor(v=vs.118).aspx|offset|length|1126620|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|2T|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|V|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|W|8|@]|9|@$K|X|L|Y|1|Z]]|A|$]]|$1|M|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|J]]]]

The Use of Razor code @Html.Hidden or @Html.HiddenFor is similar to the following Html code

<pre><code> &lt;input type="hidden"/&gt;
</code></pre>

And also refer the following link

<a href="https://msdn.microsoft.com/en-us/library/system.web.mvc.html.inputextensions.hiddenfor(v=vs.118).aspx" rel="nofollow noreferrer">https://msdn.microsoft.com/en-us/library/system.web.mvc.html.inputextensions.hiddenfor(v=vs.118).aspx</a>

blocks|key|1126712|text|像许多函数一样，这个函数可以用很多不同的方式来解决许多不同的问题，我认为它是我们工具带中的另一个工具。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1126713|到目前为止，讨论主要集中在简单地隐藏ID，但这只是一个值，为什么不将它用于很多值！这就是我正在做的事情，我使用它来加载类中的值，一次只有一个视图，因为html.beginform创建了一个新对象，如果该视图的模型对象已经传递了一些值，那么这些值将会丢失，除非您在beginform中提供了对这些值的引用。|1126714|要了解html.hiddenfor的强大动力，我建议您访问Passing+data+from+a+View+to+a+Controller+in+.NET+MVC+-+"@model"+not+highlighting|offset|length|1126715|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/44805577/passing-data-from-a-view-to-a-controller-in-net-mvc-model-not-highlighting/44806174^0|0|0|T|28|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

Like a lot of functions, this one can be used in many different ways to solve many different problems, I think of it as yet another tool in our toolbelts.

So far, the discussion has focused heavily on simply hiding an ID, but that is only one value, why not use it for lots of values! That is what I am doing, I use it to load up the values in a class only one view at a time, because html.beginform creates a new object and if your model object for that view already had some values passed to it, those values will be lost unless you provide a reference to those values in the beginform.

To see a great motivation for the html.hiddenfor, I recommend you see <a href="https://stackoverflow.com/questions/44805577/passing-data-from-a-view-to-a-controller-in-net-mvc-model-not-highlighting/44806174">Passing data from a View to a Controller in .NET MVC - &quot;@model&quot; not highlighting</a>

Although I have read the documentation on Html.HiddenFor, I've not grasped what is it used for...

Could somebody explain its uses and give a short example?

Where should those helpers go in the code?

What does Html.HiddenFor do?

虽然我已经阅读了Html.HiddenFor上的文档，但我还没有掌握它是用来做什么的。有人能解释一下它的用法并举个简短的例子吗？这些帮助器应该在代码中放在哪里？

问Html.HiddenFor是做什么的？
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