在子网站中使用邮政和挂火

Question

我一直在尝试在我的MVC5网站上使用Postal 当我托管我的网页子网站时，即 http://localhost/Subsite 收到错误

• 虚拟路径"/"映射到另一个应用程序，这是不允许的

我已经调试了它，当创建控制器上下文时，HttpContext 没有正确设置。由于我从Hangfire运行Postal ，因此HttpContext.Current始终为空。 邮政使用以下代码创建 ContollerContext。

        ControllerContext CreateControllerContext()
    {
        // A dummy HttpContextBase that is enough to allow the view to be rendered.
        var httpContext = new HttpContextWrapper(
            new HttpContext(
                new HttpRequest("", UrlRoot(), ""),
                new HttpResponse(TextWriter.Null)
            )
        );
        var routeData = new RouteData();
        routeData.Values["controller"] = EmailViewDirectoryName;
        var requestContext = new RequestContext(httpContext, routeData);
        var stubController = new StubController();
        var controllerContext = new ControllerContext(requestContext, stubController);
        stubController.ControllerContext = controllerContext;
        return controllerContext;
    }
    string UrlRoot()
    {
        var httpContext = HttpContext.Current;
        if (httpContext == null)
        {
            return "http://localhost";
        }
        return httpContext.Request.Url.GetLeftPart(UriPartial.Authority) +
               httpContext.Request.ApplicationPath;
    }

如何指定 UrlRoot，以便根据我的子网站拉取 localhost 的默认值，而不是拉取它？

Answer 1

我按照这里的指示 http://docs.hangfire.io/en/latest/tutorials/send-email.html 发送电子邮件。 教程中的方法如下

    public static void NotifyNewComment(int commentId)
{
// Prepare Postal classes to work outside of ASP.NET request
var viewsPath = Path.GetFullPath(HostingEnvironment.MapPath(@"~/Views/Emails"));
var engines = new ViewEngineCollection();
engines.Add(new FileSystemRazorViewEngine(viewsPath));
var emailService = new EmailService(engines);
// Get comment and send a notification.
using (var db = new MailerDbContext())
{
    var comment = db.Comments.Find(commentId);
    var email = new NewCommentEmail
    {
        To = "[e-mail]",
        UserName = comment.UserName,
        Comment = comment.Text
    };
    emailService.Send(email);
}
}

我发现问题是文件系统RazorViewEngine没有被使用bty postal。 为了使它工作，我必须确保FileSystemRazorViewEngine是可用引擎中的第一个引擎。 然后我删除了它，因为我不希望它成为默认引擎。 以下是我更新的方法。

    public static void NotifyNewComment(int commentId)
{
// Prepare Postal classes to work outside of ASP.NET request
var viewsPath = Path.GetFullPath(HostingEnvironment.MapPath(@"~/Views/Emails"));
var eng = new FileSystemRazorViewEngine(viewsPath));
ViewEngines.Engines.Insert(0, eng);
var emailService = new EmailService(engines);
// Get comment and send a notification.
using (var db = new MailerDbContext())
{
    var comment = db.Comments.Find(commentId);
    var email = new NewCommentEmail
    {
        To = "[e-mail]",
        UserName = comment.UserName,
        Comment = comment.Text
    };
    emailService.Send(email);
    ViewEngines.Engines.RemoveAt(0)
}
}

Answer 2

下面是另一个可能的解决方案，我认为它比上面更优雅。 它还解决了在执行后台进程时访问 MVC 应用程序时出现的问题。

public static void SendTypedEmailBackground()
{
    try
    {
        var engines = new ViewEngineCollection();
        var viewsPath = Path.GetFullPath(HostingEnvironment.MapPath(@"~/Views/Emails"));
        var eng = new FileSystemRazorViewEngine(viewsPath);
        engines.Add(eng);
        var email = new WebApplication1.Controllers.EmailController.TypedEmail();
        email.Date = DateTime.UtcNow.ToString();
        IEmailService service = new Postal.EmailService(engines);
        service.Send(email);
    }
    catch(Exception ex)
    {
        throw ex;
    }
}