What does Html HiddenFor do

Question

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

User · Answer

The Use of Razor code  Html Hidden or  Html HiddenFor is similar to the following Html code    lt input type  hidden   gt    And also refer the following link  https   msdn microsoft com en-us library system web mvc html inputextensions hiddenfor v vs 118  aspx

User · Answer

And to consume the hidden ID input back on your Edit action method    HttpPost  public ActionResult Edit FormCollection collection        ViewModel ID   Convert ToInt32 collection  ID

User · Answer

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 Passing data from a View to a Controller in  NET MVC -  quot  model quot  not highlighting

User · Answer

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   public class ViewModel       public string Value   get  set        public int Id   get  set        Now you want the edit page to store the ID but have it not be seen    lt   using Html BeginForm       gt       lt    Html HiddenFor model Id    gt  lt br   gt       lt    Html TextBoxFor model Value    gt   lt       gt    This results in the equivalent of the following HTML    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

[.net] What does Html.HiddenFor do?

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