Azure blob存储下载文件，而不是在浏览器中打开

I am uploading files to Azure blob storage using this code, where container is my CloudBlobContainer

我正在使用此代码将文件上载到Azure blob存储，其中容器是我的CloudBlobContainer

    public void SaveFile(string blobPath, Stream stream)
    {
        stream.Seek(0, SeekOrigin.Begin);
        CloudBlockBlob blockBlob = container.GetBlockBlobReference(virtualPath);

        blockBlob.Properties.ContentDisposition = 
"attachment; filename=" + Path.GetFileName(virtualPath);

        blockBlob.UploadFromStream(stream);
    }

Then when a user clicks on a file in my web page I am trying to trigger a download where they are prompted to either save/open the file. I do this by calling an Action which returns a redirect to the blob URL.

然后，当用户单击我的web页面中的一个文件时，我正在尝试触发一个下载，提示他们保存/打开该文件。我通过调用一个返回到blob URL的重定向的操作来实现这一点。

    public ActionResult LoadFile(string path)
    {    
        string url = StorageManager.GetBlobUrlFromName(path);
        return Redirect(url);
    }

The issue is this will open the files in the browser e.g. the user will be redirect away from my site and shown a .jpg file in the browser when I was expecting them to stay on my page but start downloading the file.

问题是这将打开浏览器中的文件，例如，当我期望用户在我的页面上停留但开始下载文件时，用户将被重定向离开我的站点并在浏览器中显示一个.jpg文件。

2 个解决方案

#1

What you possibly miss is invoking blockBlob.SetProperties() after setting properties.

您可能会错过在设置属性之后调用blockBlob.SetProperties()。

On my code it looks like this:

在我的代码中，它是这样的:

blob.CreateOrReplace();
blob.Properties.ContentType = "text/plain";
blob.Properties.ContentDisposition = "attachment; filename=" + Path.GetFileName(blobName);
blob.SetProperties(); // !!!

#2

One way to achieve what you want is for an MVC action to fetch the image from blob storage and return the File, ie:

实现您所需的一种方法是MVC操作从blob存储中获取图像并返回文件，即:

public ActionResult LoadFile(string path)
{    
    byteArray imageBytes = ....get img from blob storage
    return File(byteArray, "image/png", "filename.ext");
}

#1