.net - 在 Visual Studio 2005 : Problems sending E-Mail 中将旧代码从 System.Web.Mail 更新为 System.Net.Mail

Question

使用过时的 System.Web.Mail 发送电子邮件工作正常，这是代码片段:

 Public Shared Sub send(ByVal recipent As String, ByVal from As String, ByVal subject As String, ByVal body As String)
        Try
            Dim Message As System.Web.Mail.MailMessage = New System.Web.Mail.MailMessage
            Message.To = recipent
            Message.From = from
            Message.Subject = subject
            Message.Body = body
            Message.BodyFormat = MailFormat.Html
            Try
                SmtpMail.SmtpServer = MAIL_SERVER
                SmtpMail.Send(Message)
            Catch ehttp As System.Web.HttpException
                critical_error("Email sending failed, reason: " + ehttp.ToString)
            End Try
        Catch e As System.Exception
            critical_error(e, "send() in Util_Email")
        End Try
    End Sub

这是更新的版本:

Dim mailMessage As New System.Net.Mail.MailMessage()

        mailMessage.From = New System.Net.Mail.MailAddress(from)
        mailMessage.To.Add(New System.Net.Mail.MailAddress(recipent))

        mailMessage.Subject = subject
        mailMessage.Body = body

        mailMessage.IsBodyHtml = True
        mailMessage.Priority = System.Net.Mail.MailPriority.Normal

        Try

            Dim smtp As New Net.Mail.SmtpClient(MAIL_SERVER)
            smtp.Send(mailMessage)

        Catch ex As Exception

            MsgBox(ex.ToString)

        End Try

我尝试了许多不同的变体，但似乎没有任何效果，我觉得这可能与 SmtpClient 有关，这些版本之间的底层代码是否发生了变化？

没有被抛出的异常。

Answer 1

System.Net.Mail 库使用配置文件来存储设置，因此您可能只需要添加这样的部分

  <system.net>
    <mailSettings>
      <smtp from="test@foo.com">
        <network host="smtpserver1" port="25" userName="username" password="secret" defaultCredentials="true" />
      </smtp>
    </mailSettings>
  </system.net>