如何实现SignalR显示电子邮件通知到接收者的ASP.NET MVC 4应用 [英] How to implement SignalR to show email notifications to receivers in ASP.NET MVC 4 Application

问题描述

我有一个要求，以显示电子邮件通知使用SignalR接收器。我正在开发使用MVC 4.我是一个初学者，不具备SignalR很多知识我的申请。到目前为止，我已经跟着下面的帖子，试图prepare能满足我的要求的样本。

I have a requirement to show email notification to receivers using SignalR. I am developing my application using MVC 4. I am a beginner and do not have much knowledge for SignalR. So far I have followed the posts below and tried to prepare a sample that can fulfill my requirement.

的http://www.$c$cproject.com/Articles/732190/Real-Time-Web-Solution-for-Chat-by-MVC-SignalR-H

http://techbrij.com/realtime-post-comment-notifications- signalr敲除

一个以上是使用knockout.js等不是。我按照这两个，我不能够满足我的要求。

One of above is using knockout.js and other is not. I have followed both and am not able to meet my requirement.

下面是SignalR集线器类code：

Here is the code from SignalR Hub class:

  public void SendEmail(Email email)
        {
            email.SentBy = WebSecurity.CurrentUserId;

            using (NotifyEntities db = new NotifyEntities())
            {
                UsersContext uc = new UsersContext();
                db.Emails.Add(email);
                db.SaveChanges();

                var ret = new
                {
                    Message = post.Message,
                    SentBy = post.SentBy,
                };

                Clients.Caller.sendEmail(ret);


                #region add to table which contain user id and email_post_id (I am sending the email to 2 users/receivers)

                UsersMessage msgRel = new UsersMessage();
                msgRel.EID = email.Id;
                msgRel.UID = 2; //user 1
                db.UsersMessages.Add(msgRel);
                db.SaveChanges();


                msgRel = new UsersMessage();
                msgRel.EID = email.Id;
                msgRel.UID = 5;//user 2
                db.UsersMessages.Add(msgRel);
                db.SaveChanges();

                #endregion


                var unread = (from ure in db.Emails.ToList()
                              join um in db.UsersMessages on ure.Id equals um.EID
                              where um.UID == WebSecurity.CurrentUserId && um.IsReaded == false

                              orderby ure.Id descending

                              select new
                              {
                                  Message = pst.Message,
                                  SentBy = pst.SentBy,
                              }).ToArray();


                Clients.All.loadUnreadPosts(unread); //this returns unread emails of currently logged in user
                Clients.All.loadPosts(ret); // this returns all emails of currently logged in user

            }
        }

当我不使用knockout.js那么我不能够到店即时通知，但只出现在页面刷新并显示给所有用户，而不是接收者。

When I do not use knockout.js then I am not able to shop instant notification, it only appears on page refresh and it display to all users instead of the receivers.

当我使用knockout.js通知会立即显示出，但同样的问题存在消息/通知显示给所有用户。

When I use knockout.js the notification is showing instantly but the same issue exists that message/notification is displaying to all users.

请帮助我。我不知道如何为特定电子邮件的接收者创建组。

Please help me with this. I dont know how to create group for receivers of particular email.

推荐答案

为了将通知发送给特定的用户只，你想使用小组 SignalR功能。下面是关于如何设置它的一些文件：链接

In order to send the notification to specific users only, you would want to use the Group functionality of SignalR. Here is some documentation on how to set it up: link

您可能会最终在用户登录或一些类似的行动创造每个用户组。

You would probably end up creating a group per user on user login or some similar action.

public async Task UserOnline(string emailAddress)
{
    await Groups.Add(this.Context.ConnectionId, emailAddress);
}

那么你将要使用像这样在你的signalr SendEmail 枢纽类。

Clients.Group(emailAddress).loadUnreadPosts(unread); 
Clients.Group(emailAddress).loadPosts(ret); 

作为一个方面说明，我建议通过文件在我提供的链接去。不应该有任何理由，你需​​要使用淘汰赛获得signalR适当工作。

As a side note, I recommend going through the documentation at the link I provided. There should be no reason that you need to use knockout to get signalR to work appropriately.

修改

我已经得到了类似之前上述工作的东西（虽然我已经失去了code）;但我只是碰到这种文章可能实际上提供了更好的解决方案。

I have gotten something similar to the above working before (although I have lost that code); but I just came across this article that may actually provide a more elegant solution.

这篇关于如何实现SignalR显示电子邮件通知到接收者的ASP.NET MVC 4应用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！