Error while sending large (8mb) excel file using HttpWebRequest to servicestack service

Question

I am trying to send large excel file to the rest service ( using servicestack).

client and server(Servicestack service) applications are deployed on different server.

I am using following code at client side to upload the excel file ( 8 mb size)

taken from

http://www.codeproject.com/Articles/501608/Sending-Stream-to-ServiceStack

 HttpWebRequest client = (HttpWebRequest)WebRequest
                 .Create(ConfigurationManager
                 .AppSettings["applicationUrl"] 
                   + @"/servicename/" 
                   + fileUpload.FileName 
                   + @"/" + FileType + @"/" 
                   + Utility.UserName + @"/" 
                   + Utility.EmployerID + @"/" 
                   + UploadedFrom);

 client.Method = WebRequestMethods.Http.Post;  

 ////the following 4 rows enable streaming 
  client.AllowWriteStreamBuffering = false;
  client.SendChunked = true;
  client.ContentType = "multipart/form-data;";
  client.Timeout = int.MaxValue;
   // client.KeepAlive = false;
  //client.ProtocolVersion = HttpVersion.Version10;
 //client.ContentLength = 0;
 //client.Timeout = Timeout.Infinite;
//client.AllowWriteStreamBuffering = true;
Stream stream = fileUpload.InputStream;

if (stream.CanRead)  
{  stream.Copy(client.GetRequestStream());
}

   var response = new StreamReader(client.GetResponse().GetResponseStream()).ReadToEnd();

above code works fine when file to be uploaded is 2-3 MB. it throws the error when file size is large about 8MB.
while debugging it gives me following error

System.Net.WebException was caught
  HResult=-2146233079
  Message=The remote server returned an error: (500) Internal Server Error.
  Source=System
  StackTrace:
       at System.Net.HttpWebRequest.GetResponse()
       at Myproject.Web.Controllers
                  .Employer.FileUploadController
                  .Upload(FileUploadViewModel fileUploadViewModel
        ,HttpPostedFileBase fileUpload
        ,String DataFileType
        ,String UploadedFrom) 
    in d:\MyProject\projNewArch\Controllers\Employer\FileUploadController.cs:line 262
  InnerException:

i have tried changing the setting values which can be seen as connected.

What might be the issue? Please help

Update 1: i have IIS 8.5 at server so i think the file size (8mb) might not be the issue. Do i still need to add the some setting in web.config to allow sending big size file over POST

UPDATE 2 : Found the solution. Adding maxAllowedContentLength and maxRequestLength does the trick. Please check the link provided by Smartdev in comments section

Answer 1

You still need to edit your web.config file. It should look like this:

<system.webServer>
<security>
  <requestFiltering>
    <requestLimits maxAllowedContentLength="10485760" /> 
  </requestFiltering>
</security>

This will allow you to upload up to 10MB