C#发送邮件及附件

C#发送邮件的功能在网上找了很多也有利用socket的 ，试了一下不行的原因是smtp服务器的问题。在这里我用了mailmessage和搜狐的stmp.sohu.com。源码如下：

 

    protected void Button1_Click(object sender, EventArgs e)

    {

        string from = ******@sohu.com;

        string fromer = "发件人";

        string to = "*****@126.com";

        string toer = "收件人";

        string Subject = "邮件标题";

        string file="附件地址";

        string Body ="发送内容";

        string SMTPHost = "smtp.sohu.com";

        string SMTPuser = "******@sohu.com";

        string SMTPpass = "*******";

        sendmail(from, fromer, to, toer, Subject, Body,file,SMTPHost, SMTPuser, SMTPpass);

    }

 

 

 

 

    /// <summary>

    /// C#发送邮件函数

    /// </summary>

    /// <param name="from">发送者邮箱</param>

    /// <param name="fromer">发送人</param>

    /// <param name="to">接受者邮箱</param>

    /// <param name="toer">收件人</param>

    /// <param name="Subject">主题</param>

    /// <param name="Body">内容</param>

    /// <param name="file">附件</param>

    /// <param name="SMTPHost">smtp服务器</param>

    /// <param name="SMTPuser">邮箱</param>

    /// <param name="SMTPpass">密码</param>

    /// <returns></returns>

    public bool sendmail(string sfrom, string sfromer, string sto, string stoer, string sSubject, string sBody, string sfile, string sSMTPHost, string sSMTPuser, string sSMTPpass)

    {

        ////设置from和to地址

        MailAddress from = new MailAddress(sfrom, sfromer);

        MailAddress to = new MailAddress(sto, stoer);

        ////创建一个MailMessage对象

        MailMessage oMail = new MailMessage(from, to);

        //// 添加附件

        if (sfile != "")

        {

            oMail.Attachments.Add(new Attachment(sfile));

        }

 

        ////邮件标题

        oMail.Subject = sSubject;

        ////邮件内容

        oMail.Body = sBody;

        ////邮件格式

        oMail.IsBodyHtml = false;

        ////邮件采用的编码

        oMail.BodyEncoding = System.Text.Encoding.GetEncoding("GB2312");

        ////设置邮件的优先级为高

        oMail.Priority = MailPriority.High;

        ////发送邮件

        SmtpClient client = new SmtpClient();

        ////client.UseDefaultCredentials = false; 

        client.Host = sSMTPHost;

        client.Credentials = new NetworkCredential(sSMTPuser, sSMTPpass);

        client.DeliveryMethod = SmtpDeliveryMethod.Network;

        try

        {

            client.Send(oMail);

            return true;

        }

        catch (Exception err)

        {

            Response.Write(err.Message.ToString());

            return false;

        }

        finally

        {

            ////释放资源

            oMail.Dispose();

        }

    }