How to set the value of a hidden field from a controller in mvc

Question

I want to set the value of a hidden field from a controller.How can i do this?

In view part i have given like this..

 <div>
@Html.Hidden("hdnFlag", null, new { @id = "hdnFlag" }) 
</div>

Answer 1

You could set the corresponding value in the ViewData/ViewBag:

ViewData["hdnFlag"] = "some value";

But a much better approach is to of course use a view model:

model.hdnFlag = "some value";
return View(model);

and use a strongly typed helper in your view:

@Html.HiddenFor(x => x.hdnFlag, new { id = "hdnFlag" })

Answer 2

Please find code for respected region.

Controller

ViewBag.hdnFlag= Session["hdnFlag"];

View

<input type="hidden" value="@ViewBag.hdnFlag" id="hdnFlag" />

JavaScript

var hdnFlagVal = $("#hdnFlag").val();

Answer 3

Without a view model you could use a simple HTML hidden input.

<input type="hidden" name="FullName" id="FullName" value="@ViewBag.FullName" />

Answer 4

You need to write following code on controller suppose test is model, and Name, Address are field of this model.

public ActionResult MyMethod()
{
    Test test=new Test();
    var test.Name="John";
    return View(test);   
}

now use like like this on your view to give set value of hidden variable.

@model YourApplicationName.Model.Test

@Html.HiddenFor(m=>m.Name,new{id="hdnFlag"})

This will automatically set hidden value=john.