Question

我使用Azure Blob Storage添加图片。我的图像质量由于某种原因以不良方式改变，这导致我的功能不正确。

有人可以对它进行一些说明。我怎么能避免？

CloudBlockBlob blob = _blobContainer.GetBlockBlobReference(filename);
file.Position = 0;
stickerBlob.Properties.ContentType = "image/bmp";
stickerBlob.UploadFromStream(file);    //its just a Stream Object.

代码共享。我也提到了内容类型。我也可以下载并查看图像但没有任何ContentType，我的逻辑也失败了。

Answer 1

以.png格式保存图像会很好。您可能希望为其他格式（https://msdn.microsoft.com/en-us/library/bb882583(v=vs.110).aspx）

指定压缩级别

public bool UploadImage(Bitmap bitmap)
{
    bool success = false;
    try
    {
        CloudBlobContainer container = BlobClient.GetContainerReference("YourContainerName");
        CloudBlockBlob blob = container.GetBlockBlobReference("YourBlobReference");
        blob.Properties.ContentType = "image/png";
        byte[] file;
        using (MemoryStream stream = new MemoryStream())
        {
            bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
            file = stream.ToArray();
        }
        blob.UploadFromStream(new MemoryStream(file));
        success = true;

    }
    catch (Exception ex)
    {
        //Handle error here
    }
    return success;
}

Azure blob存储正在弄乱图像质量

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