Re: System.Drawing.Image and jpg images
- From: "FlyFishGuy" <FlyFishGuy@xxxxxxxxxxxxx>
- Date: Tue, 17 Jan 2006 21:23:31 -0500
OK. I've got it... duh!
Try
strm = New System.IO.MemoryStream(imageBytes)
objImage = System.Drawing.Image.FromStream(strm)
It's too easy in .NET to look for a complicated solution, when a simple one
exists.
Thank me for the response!
"FlyFishGuy" <FlyFishGuy@xxxxxxxxxxxxx> wrote in message
news:esppQByGGHA.376@xxxxxxxxxxxxxxxxxxxxxxx
> I'm trying to perform a very simple operation of saving/reading an image
> to/from SQL Server, but I must be missing something. There are a thousand
> articles on the topic, but for some bizarre reason I can't find one
> relevant to what I'm doing.
>
> I take an uploaded jpg file, convert it to a byte array and save it in an
> SQL image type field. This is pretty simple and no problem so far. I'd
> then like to read the data and reconstruct the jpg. I read the data back
> into a byte array, and this is where I'm stumped. I'd like to reconstruct
> the original file as type System.Drawing.Image, but this is where my
> problem is.
>
> If I take my byte array imageBytes(), and do this...
>
> Dim objImage As System.Drawing.Image
> Dim strm As New System.IO.MemoryStream
>
> Try
> strm.Read(imageBytes, 0, imageBytes.Length)
> strm.Seek(0, IO.SeekOrigin.Begin)
> objImage = System.Drawing.Image.FromStream(strm, False)
>
> ... it throws an exception 'Parameter is not valid.' on the last line
> (regardless of whether the last parm is True or False).
>
> Now I don't really expect it to work, because there's no way for me to
> tell the image object that it's a jpg. I assume it's expecting a bitmap.
> So that's my problem. I obviously don't want to convert a compressed jpg
> to a big bitmap before saving to the DB and I certainly don't want to
> stream the bytes to a disk file and then read it back in, although both of
> these workarounds should easily work.
>
> So there's my problem. How can I read in a jpg, streamed as a byte array
> into the DB, and then read/convert it into a System.Drawing.Image object.
> I'm sure there must be a simple answer, it just seems to be escaping me.
>
> Thanks for any help.
>
>
>
>
.
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- From: FlyFishGuy
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