asp.net core的文件下载

1.简单的允许某mime类型下载 

Startup.cs文件中Configure()添加

app.UseStaticFiles(new StaticFileOptions {
               ContentTypeProvider=new FileExtensionContentTypeProvider(new Dictionary<string, string> {
                   {
                       ".apk","application/vnd.android.package-archive"
                   },
                   {
                      //其它它类型
                   }
               })
            });