StreamWriter Error: Cannot close stream until all bytes are written.

Question

User-1836216065 posted

 Hi,

 I have a testing platform that allows data to be posted to a real time collection system.  It uses the StreamWriter object to send both HTTP and XML formats,

 It works fine, but there is a new request to submit uploaded files.  This again works fine, unless the files are over 70k (we need to test upto 3MB).  If it is over 70k, the response is the content-length too big. 

 I have changed it so that the content-length is now set dynamically, dependant on the size of the file uploaded.  However, when the StreamWriter.Close() runs, the execption The request was aborted: The request was canceled. is generated, with the InnerException Cannot close stream until all bytes are written.

From what I have found on the web, the solution is use StreamWriter.Flush(), but this code is already in place.

 Code is as follows: 

        With WebRequest
            .Method = "POST"
            .ContentType = "application/x-www-form-urlencoded"
            .PreAuthenticate = False
            .AuthenticationLevel = Security.AuthenticationLevel.None
        End With

        If FileSize > 0 Then
            WebRequest.ContentLength = FileSize
        End If

        Try
            RequestStream = WebRequest.GetRequestStream()
            StreamWriter = New StreamWriter(RequestStream)
            StreamWriter.Write(strDataToPost)
            StreamWriter.Flush()
            RequestStream.Flush()
            StreamWriter.Close()
            RequestStream.Close()
        Catch ex As Exception
            RTResponse(0) = -1
            RTResponse(1) = ex.Message
        End Try 

 I have also tried amending the timeout, but it makes no difference.

 Any help would be greatly appreciated.

Answer 1

User-990694832 posted

A person could try streamwriter.dispose

Also, naming the variables the same name as the class could be causeing the error 

use strWriter = new streamWriter 

Hope this helps

DK

Answer 2

User1941953360 posted

Increase the value of "HttpWebRequest.Timeout". This value restricts the total time within which the reqest must complete.