Question

如何将位图对象作为图像保存到Amazon S3？

我已经完成了所有设置但是我有限的C sharp阻止了我完成这项工作。

// 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);

正如您所看到的，S3函数只能接受一个字符串并将其保存为文件正文。

如何以这样的方式编写它，它允许我传入一个位图对象并将其保存为图像？也许作为一个流？或者作为字节数组？

我感谢任何帮助。

Answer 1

您可以使用WithInputStream或WithFilePath。例如，在将新图像保存到S3时：

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

设置请求对象的InputStream属性：

titledRequest.InputStream = image;

使用C＃将文件添加到Amazon S3上的存储桶

2 个答案: