如何将我的.net框架升级到4.0到4.5用于发送邮件 [英] how to upgrading my .net framework to 4.0 to 4.5 for seding mail

问题描述

您好，







如何更新我的.net框架4.0 visual stdio 2010 ultimate到.net

4.5 visual stdio 2012



System.Net.Mail.SmtpException：发送邮件失败。 ---> System.IndexOutOfRangeException：索引超出了数组的范围。在System.Net.Base64Stream.EncodeBytes（Byte [] buffer，Int32 offset，Int32 count，Boolean dontDeferFinalBytes，Boolean shouldAppendSpaceToCRLF）System.Net.Base64Stream.Write（Byte [] buffer，Int32 offset，Int32 count）at System.Net System.Net.Mail.SmtpClient上的System.Net.Mail.Message.Send（BaseWriter writer，Boolean sendEnvelope）上的System.Net.Mime.MimeMultiPart.Send（BaseWriter writer）中的.Mime.MimePart.Send（BaseWriter writer）。发送（MailMessage消息）---结束内部exc

解决方案

这是修复 - FIX：发送邮件失败当您使用基于.NET Framework 4.0的应用程序发送电子邮件时，如果使用System.Net.Mail.SmtpClient类电子邮件附件大于3 MB [ ^ ]。

Hello,



how can i update my .net framework 4.0 visual stdio 2010 ultimate to .net
4.5 visual stdio 2012

System.Net.Mail.SmtpException: Failure sending mail. ---> System.IndexOutOfRangeException: Index was outside the bounds of the array. at System.Net.Base64Stream.EncodeBytes(Byte[] buffer, Int32 offset, Int32 count, Boolean dontDeferFinalBytes, Boolean shouldAppendSpaceToCRLF) at System.Net.Base64Stream.Write(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Mime.MimePart.Send(BaseWriter writer) at System.Net.Mime.MimeMultiPart.Send(BaseWriter writer) at System.Net.Mail.Message.Send(BaseWriter writer, Boolean sendEnvelope) at System.Net.Mail.SmtpClient.Send(MailMessage message) --- End of inner exc

解决方案

Here is the fix - FIX: "Failure sending mail" error message when you send an email message by using a .NET Framework 4.0-based application that uses the "System.Net.Mail.SmtpClient" class if the email attachment is larger than 3 MB[^].

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