Question

我试图用下面的代码捕获smtpclass的内部异常，但是它给出了另一个错误，说明没有定义innerexception

Try
    mail.To.Add(lstRecipients(i))

    Try
        SetStatus("Sending:-" & lstRecipients(i))
        smtp.Send(mail)
        lSent += 1
        bwrkMain.ReportProgress(i + 1)
        SetStatus("Sent:-" & lstRecipients(i))
        lSent += 1
    Catch ex As SmtpFailedRecipientsException
        bwrkMain.ReportProgress(i + 1)
        SetStatus("Error:-" & lstRecipients(i) & " - " &
            ex.InnerException.Message)
    End Try
Catch ex As Exception
    SetStatus("Error:-" & lstRecipients(i) & " - " & ex.Message)
End Try

Answer 1

未定义InnerException，请查看Exceptions within Exceptions部分

Answer 2

确保在尝试使用之前检查您的InnerException是否为Nothing：

If Not(ex.InnerException Is Nothing) Then
     SetStatus("Error:-" & lstRecipients(i) & " - " &
            ex.InnerException.Message)
End If

在smtp类vb.net 2008中捕获ex.innerexception

2 个答案: