问题
I have an ASP.NET web application, created in Visual Studio 2017.
In the application there is a form, where the users can upload files. When files are uploaded, I process them and I save them on the filesystem:
var photo = Request.Files["file"];
photo.SaveAs("D:\\home");
Everything works perfect locally, but it's not working when I deploy the App on Azure App Services.
I read that, on Azure, the path
D:\home
should be writable.
But when I try the code I get this error:
Access to the path 'd:\home\test_image.JPG' is denied.
回答1:
Use %TEMP%, which on Azure App Service (Windows) resolves to d:\local. That's the local machine disk, not network storage, so significantly faster. It gets wiped on app restart so code accordingly.
var tempDirectoryPath = Environment.GetEnvironmentVariable("TEMP");
var filePath = Path.Combine(tempDirectoryPath, Request.Files["file"]);
If you want durability use Blob Storage instead.
回答2:
You should never use absolute paths on server components. Try something like this for instance
var folder = Environment.GetFolderPath(System.Environment.SpecialFolder.CommonApplicationData);
var filePath = Path.Combine(folder, Request.Files["file"]);
来源：https://stackoverflow.com/questions/48947739/azure-app-service-write-to-filesystem-asp-net-web-application