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<p class="mb0 mt6">Closed <span title="2019-05-01 16:40:06Z" class="relativetime">12 months ago</span>.</p>
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I am having ajax request which is working only half way.
function receivedText() {
alert(fr.result); //Here i have good result
$.ajax({
type: "POST",
url: "/Gallery/UploadImage",
contentType: "application/json; charset=utf-8",
dataType: "json",
data: {
byteArray: fr.result,
fileName: $('input[type=file]').val().split('\\').pop()
},
success: function (data) {
if (data == 0)
alert("error");
else
alert("Success");
},
error: function () {
alert("ERROR");
}
});
}
Here is my request. As you can see i commented up there that in my test(alert) fr.result has value BUT when i debug and go see it in my controller, it is NULL.
Here is my controller.
[HttpPost]
public IActionResult UploadImage(byte[] byteArray, string fileName)
{
try
{
System.IO.File.WriteAllBytes(_hostingEnvironment.WebRootPath + "\\Uploads\\Images\\" + fileName, byteArray);
return Json(0);
}
catch
{
return Json(0);
}
}
</div>
Your're using ajax in a wrong way.
The first error is a mismatch with Content-Type
$.ajax({
...
contentType: "application/json; charset=utf-8",
...
data: {
byteArray: fr.result,
fileName: $('input[type=file]').val().split('\\').pop()
},
...
}
Although you've set the Content-Type=application/json, the payload sent to server will be form-url-encoded by default:
fileName=Xyz&byteArray=
If you need JSON format, you should use JSON.stringify({...}) to get a text representation.
The contentType: "application/json; is not suitable here. That's because :
byte[] with json.IActionResult UploadImage([FromBody] Fr fr)If you're sending an image, the easiest way is to use the Content-Type of multipart/form-data with the IFormFile on the server side at the same time.
// action method
public IActionResult UploadImage(IFormFile image, string fileName)
{
// ...
}
and now you could send a FormData :
// your receivedText() function
function receivedText(){
var formData = new FormData();
formData.append('fileName', 'Xyz.img');
// if you need upload image
var inputFileElement=document.getElementById("inputFileImage");
formData.append('image', inputFileElement.files[0]);
// of if you're already have a `byte[]`, you could do it as below:
// var blob = new Blob([bytearray]...); // see https://developer.mozilla.org/en-US/docs/Web/API/Blob/Blob
// formData.append('image', blob);
$.ajax({
type: "POST",
url: "/Gallery/UploadImage",
contentType: false,
processData: false,
data: formData,
success: function (data) {
console.log(data);
// ...
},
error: function () {
// ...
}
});
}
That would be your idea:
public class UploadImageBindings {
public string byteArray {get;set;}
public string fileName {get;set;}
}
[HttpPost]
public IActionResult UploadImage(UploadImageBindings bindings)
{
try
{
var bytes = System.Text.Encoding.UTF8.GetBytes(bindings.byteArray);
System.IO.File.WriteAllBytes(_hostingEnvironment.WebRootPath + "\\Uploads\\Images\\" + bindings.fileName, bytes);
return Json(0);
}
catch
{
return Json(0);
}
}
Your problem is that you not post as byte[] but you have to post as string !