Passing more then 1 value to webmethod using FormData via Ajax - ajax

Question

I'm trying to pass the uploaded image + two additional parameters to my web service using the FormData method from my Ajax method as shown here:
var formData = new FormData();
formData.append('file', $('#photo')[0].files[0]);
formData.append('u', "test");
formData.append('s', "Testing");
My ajax call is outlined like so:
$.ajax({
url: "/admin/WebService/test.asmx/UploadImage",
type: "POST",
processData: false,
contentType: false,
data: formData,
success: function (response) {
console.log(response);
},
error: function (er) {
alert(er);
}
});
Which calls this webmethod:
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public string UploadImage()
{
if (System.Web.HttpContext.Current.Request.Files.AllKeys.Any())
{
var t= System.Web.HttpContext.Current.Request.Files["s"];
var c= System.Web.HttpContext.Current.Request.Files["u"];
var p = System.Web.HttpContext.Current.Request.Files["file"];
}
else
{
return "Error";
}
return "Error";
}
The issue I'm having is the parameters 'u' and 's' are null yet when referencing file I'm able to get its value.
Whilst searching the web I was under the impression you can specify as many key/values are required when using this approach unless I have been misinformed? can someone please shed some light into why these two parameters are null? Thanks in advance.

Answer 1

This works for me:
JavaScript
var formData = new FormData();
formData.append("UserId", userId);
formData.append("RequestPhoto", imageFile);
formData.append("RequestVoiceRecord", voiceFile);
formData.append("Latitude", latitude);
formData.append("Longitude", longtitude);
$.ajax({
type: "POST",
url: "/User/CreateRequest",
data: formData,
contentType: false,
processData: false,
success: function () {
alert("OK");
},
error: function () {
alert("Error");
}
});
Controller:
public class UserController : ApiController
{
[HttpPost]
public int CreateRequest()
{
// HttpResponseMessage result = null;
var httpRequest = HttpContext.Current.Request;
var req = new UserRequest
{
UserId = Guid.Parse(httpRequest.Form["UserId"]),
Photo = httpRequest.Files["RequestPhoto"],
VoiceRecord = httpRequest.Files["RequestVoiceRecord"]
Latitude = float.Parse(httpRequest.Form["Latitude"]),
Longitude = float.Parse(httpRequest.Form["Longitude"]),
};

Answer 2

You should create one json instead of create this stuff, add whatever keys you want to sent via ajax.
var formData = {'u':'value','s':'value'}
$.ajax({
url: "/admin/WebService/test.asmx/UploadImage",
type: "POST",
processData: false,
contentType: false,
data: JDON.Stringify(formData),
success: function (response) {
console.log(response);
},
error: function (er) {
alert(er);
}
});
try using this way.