how to pass file from view to controller

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ASP.NET

MySQL

MVC3

Helo Freinds

I had a doubt in what is passing from view to controller
In my controller i give like this

public ActionResult Details(byte[] data)
       {
           Image g = new Image();
           g.Img = data;
           try
           {
               this.dbContext.Add(g);
               this.dbContext.SaveChanges();
           }
           catch
           {
               return View();
           }
           var str = new { st = "saved" };
           return Json(str, JsonRequestBehavior.AllowGet);
       }

In my view define <input type="file" id="photos">
by using file id am passing data.So in what format the controller received that data

My view file looks like this:

$("#save").click(function (event) {

              alert("hai");
              $.ajax({

                  type: "POST",
                  url: '/Home/Details',
                  data: $('#photos').load(url),
                  contentType: "application/json; charset=utf-8",
                  dataType: "json",
                  success: function (str) {
                      alert("hai");
                      alert(str.st);
                  }
              });
          });

by using this syntax data:$('#photos').load(url) so in data what is there i mean path or file.In my database fields are Id(int), img(LongBlob) so my code is not working please help provide me any suggestions or code to find out the solution....