Empty array with BinaryReader on UploadedFile in c#

Question

Assume the following code:

Stream file = files[0].InputStream;

var FileLen = files[0].ContentLength;

var b = new BinaryReader(file);
var bytes = b.ReadBytes(FileLen);

If I upload a CSV file that is 10 records ( 257 bytes ), the BinaryReader fills the array of bytes with "0".

I also wrote a loop to step through the ReadByte Method of the BinaryReader and in the first iteration of the loop, I received the following exception:

Unable to read beyond the end of the stream

When I increase the CSV file to 200 hundred records, everything worked just fine.

The question is then, Why does this happen on smaller files, and is there a workaround that allows the Binary read of smaller files.

Bizarre - and if you check with Fiddler etc, is there a payload? — Marc Gravell, Feb 03 '11 at 08:27
Yes, there is a payload, I am able to load the payload into a streamreader and pull the first line, I am sure I could pull all info that way. I would like to store binary in the DB instead of the string form though. — Paul Shriner, Feb 03 '11 at 19:55
@Adeel, you were exactly right, after checking everything over and over again, it was the BaseStream.position that was the problem. — Paul Shriner, Feb 07 '11 at 21:57

score 23 · Accepted Answer · edited Mar 19 '11 at 17:02

23

Not sure why, but when you are using BinaryReader on an uploaded stream, the start position needs to be explicitly set.

b.BaseStream.Position = 0;

edited Mar 19 '11 at 17:02

Konerak

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answered Feb 07 '11 at 21:58

Paul Shriner

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Empty array with BinaryReader on UploadedFile in c#

1 Answers1