Save Image from Memorystream using C# and ASP.NET

Question

I am using a memory stream to resize an image through a FileUpload control. After it resizes it I want it to save to my filesystem at "~/images/2012/" + filename.

How do I save the image from a memorystream?

System.Drawing.Image imageLarge = System.Drawing.Image.FromStream(stream);
System.Drawing.Image imageLarge1 = ResizeImage(imageLarge, 200, 300);

MemoryStream memolarge = new MemoryStream();
imageLarge1.Save(memolarge, System.Drawing.Imaging.ImageFormat.Jpeg);
System.Drawing.Image returnImage = System.Drawing.Image.FromStream(memolarge);

Encoder myEncoder;
EncoderParameter myEncoderParameter;
EncoderParameters myEncoderParameters;
myEncoder = Encoder.Quality;
myEncoderParameter = new EncoderParameter(myEncoder, 100L);
myEncoderParameters.Param[0] = myEncoderParameter;

string convertedImage = returnImage.ToString();
returnImage.Save("~/images/2012/" + filename, 
    ImageFormat.Jpeg, myEncoderParameters);

This is the error I am getting along with an overloaded method error:

cannot convert from 'System.Drawing.Imaging.ImageFormat' to System.Drawing.Imaging.ImageCodecInfo

Jon Skeet · Accepted Answer · 2012-10-03 18:52:58Z

4

Look at the overloads of Image.Save.

Only the final two accept EncoderParameters, and neither of them accept an ImageFormat - both accept an ImageCodecInfo.

It's very important to be able to diagnose this kind of problem yourself:

Look at the compiler error carefully
Read the documentation
Check whether the call you're making makes sense

This has nothing to do with saving to a MemoryStream in particular - in fact, it's not clear why you're saving an Image and then immediately loading an Image from the same stream. (I'd advise setting the Position to 0 before you do so anyway, if you really want to keep doing this.)

answered Oct 3, 2012 at 18:52

Jon Skeet

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Comments

cdhowie · Accepted Answer · 2012-10-03 18:51:54Z

2

Try this line instead:

returnImage.Save(
    "~/images/2012/" + filename,
    ImageCodecInfo.GetImageEncoders()
        .Where(i => i.MimeType == "image/jpeg")
        .First(),
    myEncoderParameters);

answered Oct 3, 2012 at 18:51

cdhowie

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1 Comment

Pacobart Over a year ago

When I use this code it gives me this error "Use of unassigned local variable 'myEncoderParameters' Any idea what that means? I tried googling it but I am at best an ametur coder and I'm not getting it.

Community · Accepted Answer · 2017-05-23 11:43:12Z

0

See post Saving as jpeg from memorystream in c# it does something very similar to what you are looking for.

Also to change the codec properly http://msdn.microsoft.com/en-us/library/ytz20d80.aspx

edited May 23, 2017 at 11:43

CommunityBot

11 silver badge

answered Oct 3, 2012 at 18:59

DRobertE

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