我的代码有什么问题？

Question

我的代码有什么问题？？ 我正在按钮单击事件中启动线程。 我没有收到任何错误，但它不会触发发送电子邮件子。

Dim thread As New Thread(New ThreadStart(AddressOf sendEmail))
        thread.Start()
        thread.IsBackground = True
        thread.Priority = System.Threading.ThreadPriority.Normal
        Response.Redirect(getRedirectionPath)

 Public Sub sendEmail()

        Response.Redirect("~/Index")

    End Sub

为什么不起作用？

更新：我收到错误消息“线程被终止”

更新：根据要求，我已经上传了完整的代码段

 Protected Sub btnLocalSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnLocalSubmit.Click
        'Dim _User As MembershipUser = Membership.GetUser(_userName)
        'Dim _UserGUID As Object = _User.ProviderUserKey


        Dim _con As New SqlConnection(ConfigurationManager.ConnectionStrings("CitizenJDBConnectionString").ConnectionString)
        Dim _sqlComm As New SqlCommand("INSERT INTO LocalReport VALUES (@UserID,@ReportTitle,@Report,@State,@City,@Locality,'0','0',@Tags,@TimeStamp)", _con)
        Try

            _sqlComm.Parameters.Add("UserID", Data.SqlDbType.VarChar)
            _sqlComm.Parameters("UserID").Value = _userName

            _sqlComm.Parameters.Add("ReportTitle", Data.SqlDbType.VarChar)
            _sqlComm.Parameters("ReportTitle").Value = txtLocalReportTitle.Text

            _sqlComm.Parameters.Add("Report", Data.SqlDbType.VarChar)
            _sqlComm.Parameters("Report").Value = ckLocalReport.Text

            _sqlComm.Parameters.Add("State", Data.SqlDbType.VarChar)
            _sqlComm.Parameters("State").Value = ddlState.SelectedValue

            _sqlComm.Parameters.Add("City", Data.SqlDbType.VarChar)
            _sqlComm.Parameters("City").Value = ddlCity.SelectedItem.Value

            _sqlComm.Parameters.Add("Locality", Data.SqlDbType.VarChar)
            _sqlComm.Parameters("Locality").Value = txtLocation.Text

            _sqlComm.Parameters.Add("Tags", Data.SqlDbType.VarChar)
            _sqlComm.Parameters("Tags").Value = txtLocalTags.Text

            _sqlComm.Parameters.Add("TimeStamp", Data.SqlDbType.DateTime)
            _sqlComm.Parameters("TimeStamp").Value = DateTime.Now


            _con.Open()
            _sqlComm.ExecuteNonQuery()
            _con.Close()

            Dim logic = New connections
            logic.emailsToSend(User.Identity.Name, getURL, reportedBy)
            'sendEmail()
            Dim thread As New Thread(New ThreadStart(AddressOf sendEmail))
            thread.Start()
            Response.Redirect(getRedirectionPath)
        Catch ex As Exception
            MsgBox(ex.Message)
            Response.Write(ex.Message)
        Finally
            _con.Close()
            _con.Dispose()
            _sqlComm.Dispose()

        End Try
    End Sub
    Public Sub sendEmail()
        Dim _con As New SqlConnection(ConfigurationManager.ConnectionStrings("CitizenJDBConnectionString").ConnectionString)
        Dim _sqlDataAdapter As New SqlDataAdapter("SELECT * FROM EmailSender", _con)
        Dim _table As New System.Data.DataTable


        Try
            _con.Open()
            _sqlDataAdapter.Fill(_table)
            _con.Close()

            For i As Integer = 0 To _table.Rows.Count


                Dim AppPath As String = Request.PhysicalApplicationPath

                Dim sr As New StreamReader(AppPath & "EmailTemplates/NewReport.txt")
                Dim message As New MailMessage()

                message.IsBodyHtml = True

                message.From = New MailAddress("admin@asdf.com")

                message.To.Add(New MailAddress(_table.Rows(i).Item(1)))

                'message.CC.Add(New MailAddress("monodeep12@gmail.com"))

                message.Subject = "New User registration !"

                message.Body = sr.ReadToEnd()

                sr.Close()

                message.Body = message.Body.Replace("<%ReporterName%>", _table.Rows(i).Item(3))

                message.Body = message.Body.Replace("<%ReportURL%>", _table.Rows(i).Item(2))

                Dim client As New SmtpClient()
                client.Host = "smtp.tricedeals.com"
                'smtp.gmail.com
                client.Port = 25
                client.UseDefaultCredentials = True
                client.Credentials = New System.Net.NetworkCredential("admin@asdf.com", "111111")
                'smtp.EnableSsl = True
                client.Send(message)
                i += 1
            Next


        Catch ex As Exception
            Response.Write(ex.Message)
        End Try
    End Sub

Answer 1

Response.End方法结束页面执行，并将执行转移到应用程序的事件管道中的Application_EndRequest事件。 Response.End之后的代码行未执行。

由于两个方法都在内部调用Response.End，因此在Response.Redirect和Server.Transfer方法中会发生此问题。

要变通解决此问题，请使用下列方法之一：

对于Response.End，请调用HttpContext.Current.ApplicationInstance.CompleteRequest方法（而不是Response.End），以将代码执行绕过Application_EndRequest事件。

对于Response.Redirect，请使用重载Response.Redirect（String url，bool endResponse），为endResponse参数传递false，以禁止对Response.End的内部调用。 例如：Response.Redirect（“ nextpage.aspx”，false）;

如果您使用此替代方法，则会执行Response.Redirect之后的代码。 对于Server.Transfer，请改用Server.Execute方法。

在这里阅读更多