@* We can link the readonly html attribute to a bool defined in Razor code. 
 
This is a neat trick if you want to use the same view for different purposes.

For example, I have an AddProduct page that also acts as the EditProduct page. In "EditProduct" mode, some of the form fields that are 
used to add a new product are no longer editable (such as the product name). 

This is achieved using the html readonly attribute in the relevant fields set against a single boolean variable "@editMode". 
This variable is defined at the top of the page and can be set multiple ways through the controller: ViewBag/ViewModel, etc.

This approach reduces the need for Razor "if" statements and duplicate code. Example code below. *@

@model Gist.Models.Product

@{
    bool editMode = ViewBag.IsEdit ?? false; 
}

@using (Html.BeginForm("AddProduct", "Home", FormMethod.Post, new { @id = "formAddProduit" }))
{
  <div class="row">
      <label class="col-md-4 control-label">Product name</label>
      <input class="col-md-8" name="ProductName" type="text" value="@(Model.ProductName)" readonly="@editMode" />
  </div>
}