Mojtaba Mojtaba - 1 month ago 16
Ajax Question

Ajax FileUpload & JQuery formData in ASP.NET MVC

I have some problem with posting

formData
to server side action method. Because ajax call doesn't send files to server, I have to add file uploader data to
formData
manually like this:

var formData = new FormData();
formData.append("imageFile", $("#imageFile").file);
formData.append("coverFile", $("#coverFile").file);


I wrote jQuery function that need to post form data to server using ajax call.
It's works but posted
formData
in server side is always null!

this is my script:

<script>
function SubmitButtonOnclick()
{
var formData = new FormData();
formData.append("imageFile", $("#imageFile").file);
formData.append("coverFile", $("#coverFile").file);

$.ajax({
type: "POST",
url: '@Url.Action("EditProfile", "Profile")',
data: formData,
dataType: 'json',
contentType: "multipart/form-data",
processData: false,
success: function (response) {
$('#GeneralSection').html(response.responseText);
},
error: function (error) {
$('#GeneralSection').html(error.responseText);
}
});
}
</script>


Edit 1:
This is the action method in controller:

public ActionResult EditProfile(ProfileGeneralDescription editedModel,
HttpPostedFileBase imageFile,
HttpPostedFileBase coverFile,
string postOwnerUser)
{
try
{
if (postOwnerUser == User.Identity.Name)
{
// edit codes...
var result = GetProfileGeneralDescription(postOwnerUser);
return PartialView("_GeneralProfile", result);
}
else
{
var error = new HandleErrorInfo(
new Exception("Access Denied!"),
"Profile",
EditProfile
return PartialView("~/Views/Shared/Error.cshtml", error);
}
}
catch (Exception ex)
{
var error = new HandleErrorInfo(ex, "Profile", EditProfile
return PartialView("~/Views/Shared/Error.cshtml", error);
}
}


Edit 2:
Cshtml view file content:

@model Website.Models.ViewModel.Profile

@using (Ajax.BeginForm("EditProfile", "Profile", new { postOwnerUser = User.Identity.Name }, new AjaxOptions()
{
HttpMethod = "POST",
InsertionMode = InsertionMode.Replace,
UpdateTargetId = "GeneralSection"
}, new { enctype = "multipart/form-data" }))
{

<div>
<button id="btnSubmit" type="button" onclick="SubmitButtonOnclick()">Submit</button>
</div>

<input type="hidden" name="username" id="username" value="@Model.Username"/>

<fieldset>
<legend>Edit Photos</legend>
<div>
Select profile picture:
<input id="imageFile" type="file" name="imageFile" accept="image/png, image/jpeg" />
@Html.CheckBoxFor(modelItem => modelItem.DefaultCover)<span>Remove profile photo</span>
</div>
<div>
Select cover picture:
<input id="coverFile" type="file" name="coverFile" accept="image/png, image/jpeg" />
@Html.CheckBoxFor(modelItem => modelItem.DefaultCover)<span>RemoveCover</span>
</div>
</fieldset>
}


Any tips, link or code example would be useful.

Thank you in advance!

Answer

Instead of Jquery Ajax you could use

 <script>
            function SubmitButtonOnclick()
            { 
                var formData= new FormData();
                var imagefile=document.getElementById("imageFile").files[0];
                var coverfile=document.getElementById("coverFile").files[0];
                formData.append("imageFile",imageFile);
                formData.append("coverFile",coverFile);
                var xhr = new XMLHttpRequest();
                xhr.open("POST", "/Profile/EditProfile", true);
                xhr.addEventListener("load", function (evt) { UploadComplete(evt); }, false);
                xhr.addEventListener("error", function (evt) { UploadFailed(evt); }, false);
                xhr.send(formData);

            }

      function UploadComplete(evt) {
        if (evt.target.status == 200) 
                alert("Logo uploaded successfully.");

        else 
                 alert("Error Uploading File");
        }

    function UploadFailed(evt) {
        alert("There was an error attempting to upload the file.");

    }
 </script>

This works for me !!

Your script with changes

 function SubmitButtonOnclick() {
        var formData = new FormData();
        var file = document.getElementById("imageFile").files[0];
        var file1 = document.getElementById("coverFile").files[0];
        formData.append("imageFile", $("#imageFile").file);
        formData.append("coverfile", file1);
        $.ajax({
            type: "POST",
            url: '@Url.Action("EditProfile","Default1")',
            data: formData,
            dataType: 'json',
            contentType: false,
            processData: false,
            success: function (response) {
                $('#GeneralSection').html(response.responseText);
            },
            error: function (error) {
                $('#GeneralSection').html(error.responseText);
            }
        });
    }
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