Getting “Cannot access a closed file” errormessage when getting file from session

问题

I have a asp.net FileUpload control. I can successfully upload file to store in session, but when I am tring to get its inputstream (I'm store file in HttpPosterFile) I'm getting error

Cannot access a closed file

tr.PostedFile //<== HttpPostedFile; 
byte[] byteArray = null; 
using (var binaryReader = new BinaryReader(tr.PostedFile.InputStream)) 
{ 
    byteArray = binaryReader.ReadBytes(tr.PostedFile.ContentLength); 
}

回答1:

add this to your web.config file

<system.web>
  <httpRuntime useFullyQualifiedRedirectUrl="true" maxRequestLength="15360" requestLengthDiskThreshold="15360"/>
</system.web>

http://sanjaysainitech.blogspot.com/2008/12/file-upload-error-can-not-access-closed.html

回答2:

Did you use using?

If yes pay attention to not close this before you put the string to the inputstream.

来源：https://stackoverflow.com/questions/20468005/getting-cannot-access-a-closed-file-errormessage-when-getting-file-from-sessio