There are many ways to reset a form in MVC including:

1. Using a Form Reset Button.
2. Using JavaScript or JQuery to reset a form.

My favorite option is a different one as option 1 only resets input fields and not grids, also it does not work after the form is submitted and the field is bound to a model. Option 2 needs some plumbing for each form.

My favorite option is as below which resets the form without a lot of effort:

 <input  type="button"  class="button"  value="Reset"  name="Reset"  

onclick="document.location.href =' <%  :  Url.Action("YourGetActionMethod")  %>'"  />

For a PDF file to be returned as an action response in MVC 2, we have two options:

 1)    Either;

         public  ActionResult  GetMyPdfAsFile()

         {

             return  File(Url.Content("~/Content/Files/PDFs/MyPdf.pdf" ), "application/pdf" );

         }

2)     or;

         public  FileStreamResult  ShowMyPdf()

         {

             string  filePath = Server.MapPath("/Content/Files/PDFs/MyPdf.pdf" );

             byte [] pdf = System.IO.File .ReadAllBytes(filePath);

             MemoryStream  stream = new  MemoryStream (pdf, 0, pdf.Length);

             return  new  FileStreamResult (stream, "application/pdf" );

         }

The number of DOM elements is easy to test, just type in Firebug's console:
document.getElementsByTagName('*').length

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