发送带有附件的电子邮件使用 Cdosys.dll 库

增加 COM 引用位置:

C:\WINDOWS\System32\cdosys.dll

控制台程序的例子如下:

using System;
    class Class1
    {
        static void Main(string[] args)
        {
            try
            {
                CDO.Message oMsg = new CDO.Message();
                CDO.IConfiguration iConfg;

                iConfg = oMsg.Configuration;

                ADODB.Fields oFields;
                oFields = iConfg.Fields;

                // Set configuration.
                ADODB.Field oField = oFields["http://schemas.microsoft.com/cdo/configuration/sendusing"];

                //TODO: To send by using the smart host, uncomment the following lines:
                //oField.Value = CDO.CdoSendUsing.cdoSendUsingPort;
                //oField = oFields["http://schemas.microsoft.com/cdo/configuration/smtpserver"];
                //oField.Value = "smarthost";

                // TODO: To send by using local SMTP service.
                //oField = oFields["http://schemas.microsoft.com/cdo/configuration/sendusing"];
                //oField.Value = 1;

                oFields.Update();

                // Set common properties from message.

                //TODO: To send text body, uncomment the following line:
                //oMsg.TextBody = "Hello, how are you doing?";


                //TODO: To send HTML body, uncomment the following lines:
                //String sHtml;
                //sHtml = "<HTML>\n" +
                //    "<HEAD>\n" +
                //    "<TITLE>Sample GIF</TITLE>\n" +
                //    "</HEAD>\n" +
                //    "<BODY><P>\n" +
                //    "<h1><Font Color=Green>Inline graphics</Font></h1>\n" +
                //    "</BODY>\n" +
                //    "</HTML>";
                //oMsg.HTMLBody = sHtml;

                //TOTO: To send WEb page in an e-mail, uncomment the following lines and make changes in TODO section.
                //TODO: Replace with your preferred Web page
                //oMsg.CreateMHTMLBody("http://www.microsoft.com",
                //    CDO.CdoMHTMLFlags.cdoSuppressNone,
                //    "", "");
                oMsg.Subject = "Test SMTP";

                //TODO: Change the To and From address to reflect your information.
                oMsg.From = "someone@example.com";
                oMsg.To = "someone@example.com";
                //ADD attachment.
                //TODO: Change the path to the file that you want to attach.
                oMsg.AddAttachment("C:\\Hello.txt", "", "");
                oMsg.AddAttachment("C:\\Test.doc", "", "");
                                    oMsg.Send();
            }
            catch (Exception e)
            {
                Console.WriteLine("{0} Exception caught.", e);
            }
            return;
        }
    }

也可以保存网页为mht文件:

　　CDO.Message msg = new CDO.MessageClass();
            CDO.Configuration cfg = new CDO.ConfigurationClass();

            msg.Configuration = cfg;
            msg.CreateMHTMLBody("http://www.sina.com.cn", CDO.CdoMHTMLFlags.cdoSuppressAll, "", "");

msg.GetStream().SaveToFile("c:\\a.mht", ADODB.SaveOptionsEnum.adSaveCreateOverWrite);