Receiving binary data from HTTP POST Request in ASP.NET C#

Question

This should be very trivial but for reason can't find it. I'm posting some binary data to a form in ASP.NET as multipart/form-data and I can see that the request is receive by looking at Request.InputStream :

-------------------------------7cf2a327f01ae Content-Disposition: form-data; name="DeviceID1"

Some binary data

-------------------------------7cf2a327f01ae Content-Disposition: form-data; name="DeviceID2"

Some binary data ...

However I can't find how I can retrieve each part as part of the Request.Form (or Request.Params) collection. What could be wrong? One work around is to use a filename then retrieve from Request.Files but I wonder what is the proper way of getting the content. Thanks.

Agent_9191 · Accepted Answer · 2009-12-20 21:29:32Z

1

Request.Files is the only way to retrieve the binary data that's posted to the server.

answered Dec 20, 2009 at 21:29

Agent_9191

7,2635 gold badges36 silver badges57 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

msha Over a year ago

I found that my work around doesn't work either. Even with the filename in the post data, I still get Request.Files.Count as 0. So something else must be wrong although I can see the request comes in properly.

Jim Schubert Over a year ago

Are you using html file inputs or asp.net file controls?

msha · Accepted Answer · 2009-12-20 23:02:24Z

0

I found that one problem was the line break and that the request should be terminated with a proper separator like this:

-------------------------------7cf2a327f01ae
Content-Disposition: form-data; name="DeviceID1"

Some binary data

-------------------------------7cf2a327f01ae 
Content-Disposition: form-data; name="DeviceID2"

Some binary data
-------------------------------7cf2a327f01ae

Now the keys appear in Request.Form however this collection is of type string so I decided to use the filename and then get from Request.Files. Or I could parse the entire request content completely manually.

answered Dec 20, 2009 at 23:02

msha

1633 silver badges10 bronze badges

Collectives™ on Stack Overflow

Receiving binary data from HTTP POST Request in ASP.NET C#

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related