Read from web and write in file multiple times

Question

I am making web app and i have web api where I save data in file in async function :

    [HttpPost]
    [Route("~/api/data/savetemplate")]
    public async void Savetemplate()
    {
        try
        {
            string result = await Request.Content.ReadAsStringAsync();                
            JObject jobject = JObject.Parse(result);
            Debug.WriteLine(jobject);
            JToken id_token = jobject.Property("id").Value;
            string id = id_token.ToString();
            id = id.Replace("-", "");
            id = id.Replace(" ", "");
            id = id.Replace(":", "");
            id = id.Replace(".", "");
            string path = @"C:\client\" + id + "_template.json";
            File.WriteAllText(path, jobject.ToString());

            // write JSON directly to a file
            using (StreamWriter file = File.CreateText(path))
            using (JsonTextWriter writer = new JsonTextWriter(file))
            {
                jobject.WriteTo(writer);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex);
            throw;
        }           
    }

First time it works, but when I try again this exception appears :

    System.Net.Http.HttpRequestException was unhandled by user code
    HResult=-2146233088
    Message=Error while copying content to a stream.
    Source=mscorlib
    StackTrace:
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
    at   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Invent.DataController.<SaveSagatave>d__0.MoveNext() in  c:\Invent\DataCtrl.cs:line 211
   InnerException: System.ObjectDisposedException
   HResult=-2146232798
   Message=Cannot access a disposed object.
   Source=System.Web.Http.Owin
   ObjectName=""
   StackTrace:
        at System.Web.Http.NonOwnedStream.ThrowIfDisposed()
        at System.Web.Http.NonOwnedStream.EndRead(IAsyncResult asyncResult)
        at System.Net.Http.StreamToStreamCopy.BufferReadCallback(IAsyncResult ar)
   InnerException:

I guess problem is that, the object is disposed, but how can I fix, that object isnt disposed?

UPDATE : It throws exception at string result = await Request.Content.ReadAsStringAsync();

Your stack trace says `at Invent.DataController.d__0.MoveNext() in c:\Invent\DataCtrl.cs:line 211`. Is that the above code listing, and in that case what line is 211? — Albin Sunnanbo, Jul 28 '14 at 07:34
I'd say its failing in `ReadAsStringAsync` due to some Http related entity being disposed. — NeddySpaghetti, Jul 28 '14 at 07:41
@NedStoyanov by that you mean, after first save it disposes that object? — Imants Volkovs, Jul 28 '14 at 07:45
Async void is rarely a good idea. Change it to async Task. See http://stackoverflow.com/questions/17659603/async-void-asp-net-and-count-of-outstanding-operations — usr, Jul 28 '14 at 10:26
You might find this video interesting as well http://channel9.msdn.com/Events/aspConf/aspConf/Async-in-ASP-NET — NeddySpaghetti, Jul 28 '14 at 12:37

Read from web and write in file multiple times

0 Answers0