Html.BeginForm() with only form Id is not generating correct action url

Question

I only want to add the formId in the beginForm()

If i try using
Html.BeginForm(null, null, FormMethod.Post, new {@id="Id"})

then the Html generated is
<form action="/newquestion/payment/b9f88f80-f31f-4144-9066-55384c9f1cfc" ... >

i don't know how that action url is generated so i tried,
Html.BeginForm(new {@id="Id"})
but then the action url looks like this
<form action="/newquestion/payment/Id... >

In both the cases the action url is not what it should be and it is not hitting the post action of the controller.

Claviform

MVC uses the router to determine the URL's. What is the URL supposed to be? – Sonata

I don't want to set a fix controller and action in the BeginForm() because i want it to call the POST action based on the GET action. For example if i call payment (GET) then it should call payment (POST) and if i call Bundle (GET) then it should call Bundle (POST) action. This was working fine until now because i only had Html.BeginForm() but now i want to add the formId and that is breaking the behavior. – Claviform

Answer 1

When you are trying to generate a route, such as with BeginForm, MVC will do its best to include things that you might need.

If you're at domain.com/Home/Index/b9f88f80-f31f-4144-9066-55384c9f1cfc and you use the code that you have provided than the form will be generated with the action, controller and route values as it finds them.

controller / action / id
/Home      / Index  / b9f88f80-f31f-4144-9066-55384c9f1cfc

One way to get around this is to force id to be nothing (such as an empty string).

Observe:

@using (Html.BeginForm(null, null, new { @id = string.Empty },
    FormMethod.Post, new { @id = "Id" }))
{

}

The new { @id = string.Empty } is an anonymous object that represents the route values.

Professoriate

I'm not sure what to suggest. The code above works for me with MVC4 and MVC5. – Professoriate

Answer 2

Change @id to id.

 @using (Html.BeginForm("Index", "Home", FormMethod.Post, new { id = "MyForm1" }))    
    {
        <input id="submit" type="submit" value="Search" />
    }

Reviel

What difference does it make? – Claviform

Answer 3

Because of in System.Web.Mvc.Html ( in System.Web.Mvc.dll ) the begin form is defined like bellowed:-

BeginForm(this HtmlHelper htmlHelper, string actionName, string
controllerName, object routeValues, FormMethod method, object htmlAttributes)

Means like this : Html.BeginForm( string actionName, string controllerName, object routeValues, FormMethod method, object htmlAttributes)

So, it worked for me in MVC 4

@using (Html.BeginForm(null, null, new { @id = string.Empty }, FormMethod.Post,
    new { @id = "trainingForm" }))
{
    <input id="TRAINER_LIST" name="TRAINER_LIST" type="hidden" value="">
    <input type="submit" value="Create" id="btnSubmit" />
}

Benzoate