ASP.NET WEB API cant upload multipart/form-data (image) to Web server - asp.net

Question

After uploading image through ASP.NET WEB API successfuly through localhost . I uploaded my project to the hosting server but this time i got the error as
an error has occured
This is my controller
tutorEntities entities = new tutorEntities();
[HttpPost]
public HttpResponseMessage ImageUp()
{
var httpContext = (HttpContextWrapper)Request.Properties["MS_HttpContext"];
img std = new img();
// std.Title = httpContext.Request.Form["Title"];
// std.RollNo = httpContext.Request.Form["RollNo"];
// std.Semester = httpContext.Request.Form["Semester"];
HttpResponseMessage response = new HttpResponseMessage();
var httpRequest = HttpContext.Current.Request;
if (httpRequest.Files.Count > 0)
{
string random = Guid.NewGuid().ToString();
string url = "/UserImage/" + random + httpRequest.Files[0].FileName.Substring(httpRequest.Files[0].FileName.LastIndexOf('.'));
Console.WriteLine(url);
string path = System.Web.Hosting.HostingEnvironment.MapPath(url);
httpRequest.Files[0].SaveAs(path);
std.Path = "http://localhost:2541/" + url;
}
entities.imgs.Add(std);
entities.SaveChanges();
return Request.CreateResponse(HttpStatusCode.OK);
}

Answer 1

Ensure that AppPoolIdentity user has write permissions on the UserImage folder. Also, catch the exception in code for debugging:
try {
var httpContext = (HttpContextWrapper)Request.Properties["MS_HttpContext"];
img std = new img();
// std.Title = httpContext.Request.Form["Title"];
// std.RollNo = httpContext.Request.Form["RollNo"];
// std.Semester = httpContext.Request.Form["Semester"];
HttpResponseMessage response = new HttpResponseMessage();
var httpRequest = HttpContext.Current.Request;
if (httpRequest.Files.Count > 0)
{
string random = Guid.NewGuid().ToString();
string url = "/UserImage/" + random + httpRequest.Files[0].FileName.Substring(httpRequest.Files[0].FileName.LastIndexOf('.'));
Console.WriteLine(url);
string path = System.Web.Hosting.HostingEnvironment.MapPath(url);
httpRequest.Files[0].SaveAs(path);
std.Path = "http://localhost:2541/" + url;
}
entities.imgs.Add(std);
entities.SaveChanges();
return Request.CreateResponse(HttpStatusCode.OK);
}
catch(Exception ex) {
var response = new HttpResponseMessage(HttpStatusCode.InternalServerError)
{
Content = new StringContent(ex.ToString()),
ReasonPhrase = "Error"
}
throw new HttpResponseException(response);
}