Boolean with html helper Hidden and HiddenFor

As answered here the problem is that HTML helpers by default use the posted values (if available) then refer to the model. Personally I don't think this makes a whole bunch of sense and now wonder how many other bugs lie in wait throughout our platform.

Anyway, the solution posted in the aforementioned answer will solve the problem, just add this line before you return from the controller:

ModelState.Remove("TheBool")

And yes, it's a bit rubbish because you can only use a string reference... but it does work.

I had similar and ended up getting round it like this. The situation is the user wants a Save and then confirm save scenario....

I chose to use the solution below rather than

ModelSate.Remove("OperationConfirmed");

(which does work) as I feel it is more intuative....

@{
  string btnSaveCaption = "Save Changes";
  if (Model.OperationConfirmed)
  {
    btnSaveCaption = "Confirm Save Changes";
    @Html.Hidden("OperationConfirmed", true)
  }          
} 

Here's an example in razor:

html:
@Html.HiddenFor(Model => Model.TheBool, new { @id = "hdnBool" })

javascript:
alert($('#hdnBool').val());

model:
public class MyModel()
{
  public bool TheBool{ get; set; }
}