Asp.net mvc 在预定事件发生72小时前唤醒并发送电子邮件警报的并行过程

我有一个用ASP.NET MVC 2编写的应用程序，它在MSSQL数据库中存储用户计划事件的日期和时间。我需要应用程序在存储事件发生前72小时向用户发送电子邮件警报，无需任何手动干预

---

实现此并行过程的最佳方法是什么（我已经有了电子邮件代码）？

假设您将事件存储在数据库中，我将创建一个独立于asp.net应用程序运行的Windows服务，它定期轮询数据库，寻找要完成的工作。

如果您可以控制服务器，那么我可能会选择Windows服务（如）

但假设您不这样做，我将创建一个类，可能类似于下面的一个，您可以使用/继承它。在global.asax中的“Application_start”事件期间实例化此类，并将其副本保存在缓存中。将逻辑放在“ExecuteProcess”方法中。您的逻辑可能类似于（伪代码）：

确保MSSQL数据库表中有一个字段用于跟踪是否已发送通知

基本基类：

Imports System.Threading

Public MustInherit Class LongRunningProcess
    Public ReadOnly Property Running() As Boolean
        Get
            Return _Running
        End Get
    End Property

    Public ReadOnly Property Success() As Boolean
        Get
            Return _Success
        End Get
    End Property

    Public ReadOnly Property Exception() As Exception
        Get
            Return _Exception
        End Get
    End Property

    Public ReadOnly Property StartTime() As DateTime
        Get
            Return _StartTime
        End Get
    End Property

    Public ReadOnly Property EndTime() As DateTime
        Get
            Return _EndTime
        End Get
    End Property

    Public ReadOnly Property Args() As Object
        Get
            Return _Args
        End Get
    End Property


    Protected _Running As Boolean = False
    Protected _Success As Boolean = False
    Protected _Exception As Exception = Nothing
    Protected _StartTime As DateTime = DateTime.MinValue
    Protected _EndTime As DateTime = DateTime.MinValue
    Protected _Args() As Object = Nothing
    Protected WithEvents _Thread As Thread

    Private _locker As New Object()

    Public Sub Execute(ByVal Arguments As Object)
        SyncLock (_locker)
            'if the process is not running, then...'
            If Not _Running Then
                'Set running to true'
                _Running = True
                'Set start time to now'
                _StartTime = DateTime.Now
                'set arguments'
                _Args = Arguments
                'Prepare to process in a new thread'
                _Thread = New Thread(New ThreadStart(AddressOf ExecuteProcess))

                'Start the thread'
                _Thread.Start()
            End If
        End SyncLock
    End Sub

    Protected MustOverride Sub ExecuteProcess()
End Class

---

Args属性允许您从“ExecuteProcess”中访问可能需要的任何参数/变量。

此过程的并行性是什么？电子邮件警报将与其他应用程序功能并行发送。这是一种非正统的用法。：）我无法控制服务器，因此我将用C#重新编写您的解决方案，并尝试一下-谢谢！

Imports System.Threading

Public MustInherit Class LongRunningProcess
    Public ReadOnly Property Running() As Boolean
        Get
            Return _Running
        End Get
    End Property

    Public ReadOnly Property Success() As Boolean
        Get
            Return _Success
        End Get
    End Property

    Public ReadOnly Property Exception() As Exception
        Get
            Return _Exception
        End Get
    End Property

    Public ReadOnly Property StartTime() As DateTime
        Get
            Return _StartTime
        End Get
    End Property

    Public ReadOnly Property EndTime() As DateTime
        Get
            Return _EndTime
        End Get
    End Property

    Public ReadOnly Property Args() As Object
        Get
            Return _Args
        End Get
    End Property


    Protected _Running As Boolean = False
    Protected _Success As Boolean = False
    Protected _Exception As Exception = Nothing
    Protected _StartTime As DateTime = DateTime.MinValue
    Protected _EndTime As DateTime = DateTime.MinValue
    Protected _Args() As Object = Nothing
    Protected WithEvents _Thread As Thread

    Private _locker As New Object()

    Public Sub Execute(ByVal Arguments As Object)
        SyncLock (_locker)
            'if the process is not running, then...'
            If Not _Running Then
                'Set running to true'
                _Running = True
                'Set start time to now'
                _StartTime = DateTime.Now
                'set arguments'
                _Args = Arguments
                'Prepare to process in a new thread'
                _Thread = New Thread(New ThreadStart(AddressOf ExecuteProcess))

                'Start the thread'
                _Thread.Start()
            End If
        End SyncLock
    End Sub

    Protected MustOverride Sub ExecuteProcess()
End Class