Hello,
I used the solution to this question:
http://www.experts-exchang
to solve this problem; and I may have assigned points too soon as I've just noticed that the image doesn't load properly when received in the email. Something during the process of checking is causing problems.
Any ideas would be much appreciated!
Thanks
This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.
Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.
If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.
Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.
Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.
Access the answers to your technology questions today.
30-day free trial. Register in 60 seconds.
Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.
Try it out and discover for yourself.
30-day free trial. Register in 60 seconds.
Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.
Yeah, I had seen that. A little way down the page someone on there said:
"One problem with peeking into the stream is sometimes you can get errors with uploading the file, i have found that i actually have to dump the stream and re-upload the whole thing from the beginning after peeking at the first few bytes, if not sometimes the images does not re-assemble itself"
It says to dump the stream and reupload from the beginning - How would I go about doing this?
Hi
More Information
http://www.15seconds.com/I
Hi Tricky1974,
I was the one who gave you the original solution, so perhaps it is good to help you further? ou way you have problems, is that about saving the stream after you tried to check the stream?
You shouldn't try to download the stream to a file, because that would defeat the purpose of checking the file. Basically, I can think of two methods here:
1. Use a MemoryStream, load the data in there, use that subsequently for checking and saving
2. Use the current approach and store the file from the img object. This is also the saver way, because you can pose other restrictions: dimensions, types, color depths, whatever, on the image. You can use the SaveAs method to store the image.
-- Abel --
why dont you just restrict the files while uploading... using the RegularExpressionValidator
<asp:FileUpload runat="server" ID="upTest" />
<asp:RequiredFieldValidator
<asp:RegularExpressionValid
Nice idea, but that won't stop them from uploading these files. EE does something like that, but when you rename any file to one of the allowed extensions, you're fried and the upload succeeds. Also, some systems do not even use extensions but still the files are valid.
Not sure what the problem still is here, but the way I usually restrict image files is:
1. Restrict file size (necessary!)
2. Load the stream (in memory) as an image. If it fails, it isn't an image, discard
3. Check properties (size/bit depth) and resize dimensions if necessary
4. Save the file (disk, database)
5. Inform the user of errors
If you have a very public site, you may add DoS protection by either checking IP or prevent, through code, more then X uploads per second.
-- Abel --
Business Accounts
Answer for Membership
by: rkworldsPosted on 2009-08-28 at 08:28:45ID: 25208680
Hi
Pl see the URL, It will give Some Inputs
http://forums.asp.net/p/10