Question

带有Identity组件的Asp.net MVC EF。

我需要从目录中检索所有文件，并在应用程序启动时将它们添加到数据库中。例如，我无法将它放在HomeController中，因为每次有人访问该页面时都会这样。

这是我想要运行的代码。

DirectoryInfo di = new DirectoryInfo(Server.MapPath("~/Images"));
            var folders = di.GetDirectories().ToList().Select(d => d.Name);

  var files = di.GetFiles();
            foreach (var file in files)
            {
                var image = new Image{ name = file.ToString() };
                db.Images.Add(image);
}

我试过把它放在这里

    public class ApplicationDbInitializer : DropCreateDatabaseAlways<ApplicationDbContext>
            {
    //Here
                protected override void Seed(ApplicationDbContext context)
                {
    //Here
    }
}

但是我得不到用户Server.MapPath

的错误

我应该把代码放在哪里？

Answer 1

您应该使用此http://msdn.microsoft.com/en-us/library/system.web.hosting.hostingenvironment.mappath.aspx而不是Server.MapPath将此代码添加到Global.ascx.cs文件中的Application_Start（）方法。

它完全按照它在锡上说的那样:)

Answer 2

//Put it in the Global.asax.cs file

        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            GlobalConfiguration.Configure(WebApiConfig.Register);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);

            ScanFiles();
        }

        private void ScanFiles()
        {
            DirectoryInfo di = new DirectoryInfo(Server.MapPath("~/Images"));
            var folders = di.GetDirectories().ToList().Select(d => d.Name);

            var files = di.GetFiles();
            foreach (var file in files)
            {
                var image = new Image { name = file.ToString() };
                db.Images.Add(image);

                //Hopefully, you have called SaveChanges() , because it is not seen here but hopefully you have called it in the Add method
            }
        }

放置asp.net应用程序启动时将扫描文件夹的函数

2 个答案: