Adding a file to a bucket on Amazon S3 using C#

Question

How can I save a bitmap object as an image to Amazon S3?

I've got everything setup but my limited C sharp is stopping me from getting this done.

// I have a bitmap iamge
Bitmap image = new Bitmap(width, height);

// Rather than this
image.save(file_path);

// I'd like to use S3
S3 test = new S3();
test.WritingAnObject("images", "testing2.png", image);

// Here is the relevant part of write to S3 function
PutObjectRequest titledRequest = new PutObjectRequest();
titledRequest.WithMetaData("title", "the title")
             .WithContentBody("this object has a title")
             .WithBucketName(bucketName)
             .WithKey(keyName);

As you can see the S3 function can only take in a string and save it as the body of the file.

How can I write this in such a way that it will allow me pass in a bitmap object and save it as an image? Maybe as a stream? Or as a byte array?

I appreciate any help.

Answer 1

You would use WithInputStream or WithFilePath . For example on saving a new image to S3:

using (var memoryStream = new MemoryStream())
{
    using(var yourBitmap = new Bitmap())
    {
        //Do whatever with bitmap here.
        yourBitmap.Save(memoryStream, ImageFormat.Jpeg); //Save it as a JPEG to memory stream. Change the ImageFormat if you want to save it as something else, such as PNG.
        PutObjectRequest titledRequest = new PutObjectRequest();
        titledRequest.WithMetaData("title", "the title")
            .WithInputStream(memoryStream) //Add file here.
            .WithBucketName(bucketName)
            .WithKey(keyName);
    }
}

Answer 2

设置您的请求对象的InputStream属性：

titledRequest.InputStream = image;