Using Html.BeginForm with querystring - asp.net-mvc

Question

My url looks like this:
customer/login?ReturnUrl=home
In the login view, I have used this pattern of code which works fine.
#using(Html.BeginForm())
{
...
}
This magically generates following html
<form action="customer/login?ReturnUrl=home" method="post">
But now, I need to add an attribute (e.g., data-id="something") in the form. How can I do that? If I don't have any query string, I know I can do something like this:
#using(Html.BeginForm(action, controller, FormMethod.Post,
new { data_id="something" }))
But don't know how to add querystring which should be in html:
<form action="customer/login?ReturnUrl=home" method="post" data-id="something">
I thought about using <form> directly but don't know how to specify querystring which is variable. And I have no idea how to achieve it with Html.BeginForm. Any tip would be appreciated.
RESOLUTION:
For now, I used <form> with following hint How to get current url value in View. The resulting view looks like
<form action="#Request.Url.PathAndQuery" data-id="something" method="POST">
But it would be nice to have an overloaded method of BeginForm for this.

Answer 1

Here's The way that worked for me
Html.BeginForm("Profile", "Partner", routeValues: new {id=Partner.partner_id},method:FormMethod.Post)
It was almost like there was a problem with overloading the method, but by specifying what things are, it seems to work fine...

Answer 2

To create a RouteValueDictionary from the querystring:
RouteValueDictionary queryStringDictionary = new RouteValueDictionary(Request.QueryString.AllKeys.ToDictionary(key => key, key => (object)Request.QueryString[key]));
Then you can use it with Html.BeginForm:
Html.BeginForm(null, null, queryStringDictionary, FormMethod.Post, new Dictionary<string, object> { { "autocomplete", "off" } })

Answer 3

I guess this doesn't directly answer the question, but why not just use a plain old form tag?
<form action='customer/login?ReturnUrl=#Request.QueryString["ReturnUrl"]' method="post" data-id="something">
Alternatively, you can create a custom HtmlHelperExtension that renders a form with path and querystring. In this HtmlHelperExtension you can iterate through your querystring values and populate the routeValueDictionary which you then pass to a Html.BeginForm constructor.
If you don't want something so extensible you can just use the overloaded constructor of Html.BeginForm using
#Html.BeginForm("login", "customer", new {ReturnUrl = #Request.QueryString["ReturnUrl"]},FormMethod.Post, new {data-id="something"});

Answer 4

using Reflector to look at the code,
BeginForm() will pass directly the rawUrl over to the final Form.
Any other overloads on BeginForm will go through a helper utility which will strip the query string.

Answer 5

This works for me :
#using (Html.BeginForm("index", "Photos", routeValues: new { user = pUser, album = pAlbum, }, method: FormMethod.Get))
Explicit route values and method is what is required...

Answer 6

Just incase you wanted to add other attributes as well. use below code
#using (Html.BeginForm("actionName", "controllerName", routeValues: new { lang = "en" }, method:FormMethod.Post, htmlAttributes: new { #class= "my-form", enctype = "multipart/form-data" }))

Answer 7

Try #using(Html.BeginForm(null, null, FormMethod.Post, new { data_id="something" }))
It should use the default logic to construct the url, just as if you used BeginForm()
(never tried that though in such case, but I believe it should work)