C # Send email,

C # Send email,

I have never used the email sending function before. Some time ago, the project needs to be able to send emails after I have found many posts.

Then I sorted it out and wrote a class. You can send the message directly to the class.

It should also be noted that the POP3/SMTP service must be activated for sending mail; otherwise, an error will be reported for QQ mail and Netease mail. You don't need to activate the email address you receive. You can use Baidu to activate the email address.

1 public static class EmailHelper 2 {3 /// <summary> 4 // send email 5 /// </summary> 6 /// <param name = "subject"> email Subject </param> 7 /// <param name = "msg"> email content </param> 8 /// <param name = "filePath"> attachment address, if null or "</param> 9 // <param name =" senderEmail "> sender's email address </param> 10 /// <param name = "senderPwd"> sender's email password </param> 11 // <param name = "recipientEmail"> recipient's email </param> 12 public static void SendMail (string Subject, string msg, string filePath, string senderEmail, string senderPwd, params string [] recipientEmail) 13 {14 if (! CheckIsNotEmptyOrNull (subject, msg, senderEmail, senderPwd) | recipientEmail = null | recipientEmail. length = 0) 15 {16 throw new Exception ("invalid input information"); 17} 18 try 19 {20 string [] sendFromUser = senderEmail. split ('@'); 21 22 // construct an Email Message object 23 MailMessage message = new MailMessage (); 24 25 // determine the smtp server address. Instantiate an Smtp client 26 System. net. mail. smtpClient client = new System. net. mail. smtpClient ("smtp. "+ sendFromUser [1]); 27 28 // construct the sender address object 29 message. from = new MailAddress (senderEmail, sendFromUser [0], Encoding. UTF8); 30 31 // construct the recipient address object 32 foreach (string userName in recipientEmail) 33 {34 message. to. add (new MailAddress (userName, userName. split ('@') [0], Encoding. UTF8); 35} 36 37 if (! String. isNullOrEmpty (filePath) 38 {39 Attachment attach = new Attachment (filePath); 40 // obtain the file information 41 ContentDisposition disposition = attach. contentDisposition; 42 disposition. creationDate = System. IO. file. getCreationTime (filePath); 43 disposition. modificationDate = System. IO. file. getLastWriteTime (filePath); 44 disposition. readDate = System. IO. file. getLastAccessTime (filePath); 45 // Add the attachment 46 mess to the email Age. attachments. add (attach); 47} 48 49 // Add email subject and content 50 message. subject = subject; 51 message. subjectEncoding = Encoding. UTF8; 52 message. body = msg; 53 message. bodyEncoding = Encoding. UTF8; 54 55 // set Mail Information 56 client. deliveryMethod = SmtpDeliveryMethod. network; 57 message. bodyEncoding = System. text. encoding. UTF8; 58 message. isBodyHtml = false; 59 60 // if the server supports secure connections, set the Security connection to true. 61 // gmail, qq supported, 163 does not support 62 switch (sendFromUser [1]) 63 {64 case "gmail.com": 65 case "qq.com": 66 client. enableSsl = true; 67 break; 68 default: 69 client. enableSsl = false; 70 break; 71} 72 73 // set the user name and password. 74 client. usedefacrecredentials = false; 75 // user logon information 76 NetworkCredential myCredentials = new NetworkCredential (senderEmail, senderPwd); 77 client. credentials = myCredentials; 78 // send mail 79 client. send (message); 80} 81 catch (Exception ex) 82 {83 throw (ex ); 84} 85} 86 87 // <summary> 88 // verify that all input strings cannot be empty or null 89 // </summary> 90 // <param name = "ps"> parameter list </param> 91 // <returns> are not empty or null. tr is returned. Ue, otherwise false is returned </returns> 92 public static bool CheckIsNotEmptyOrNull (params string [] ps) 93 {94 if (ps! = Null) 95 {96 foreach (string item in ps) 97 {98 if (string. isNullOrEmpty (item) return false; 99} 100 return true; 101} 102 return false; 103} 104}

 

, Directly call the method, pass the information to be sent, you can send the mailbox.