C # send emails, which can be changed to group sending as needed ~

 

Let me go directly to the code.

 

 

Code:

Using System;

Using System. Collections. Generic;

Using System. ComponentModel;

Using System. Data;

Using System. Drawing;

Using System. Text;

Using System. Windows. Forms;

Using System. Net;

Using System. Net. Mail;

Using System. Net. Mime;

Using System. IO;

 

Namespace SendMailExample

{

/// <Summary>

/// By Andrew

// Blog: http://blog.csdn.net/Andrew_wx

/// </Summary>

Public partial class FormSendMail: Form

{

Public FormSendMail ()

{

InitializeComponent ();

}

 

Private void FormSendMail_Load (object sender, EventArgs e)

{

TxtSmtpServer. Text = "smtp.qq.com ";

TxtSend. Text = "heuandmei@qq.com ";

TxtDisplayName. Text = "Andrew (Wang Xu )";

TxtPassword. Text = ""; // Password

TxtReceive. Text = "heuandmei@qq.com ";

TxtTitle. Text = "mail test ";

TxtBody. Text = "This is a test (test )";

RbtnNoSSL. Checked = true;

}

 

Private void btnAddFiles_Click (object sender, EventArgs e)

{

OpenFileDialog odlg = new OpenFileDialog ();

Odlg. CheckFileExists = true;

// Only valid file names are received

Odlg. ValidateNames = true;

// Multiple files can be selected as attachments at a time

Odlg. Multiselect = true;

If (odlg. ShowDialog () = System. Windows. Forms. DialogResult. OK)

{

LstFiles. Items. AddRange (odlg. FileNames );

}

}

 

Private void btnSend_Click (object sender, EventArgs e)

{

This. Cursor = Cursors. WaitCursor;

MailMessage mail = new MailMessage ();

Mail. From = new MailAddress (

TxtSend. Text, txtDisplayName. Text, Encoding. UTF8 );

Mail. To. Add (txtReceive. Text );

Mail. Subject = txtTitle. Text;

Mail. SubjectEncoding = Encoding. Default;

Mail. Body = txtBody. Text;

Mail. BodyEncoding = Encoding. Default;

Mail. IsBodyHtml = false;

Mail. Priority = MailPriority. Normal;

// Add an attachment

Attachment attachment = null;

If (lstFiles. Items. Count> 0)

{

For (int I = 0; I <lstFiles. Items. Count; I ++)

{

String pathFileName = lstFiles. Items [I]. ToString ();

String extName = Path. GetExtension (pathFileName). ToLower ();

// Determine the attachment type

If (extName = ". rar" | extName = ". zip ")

{

Attachment = new Attachment (pathFileName, MediaTypeNames. Application. Zip );

}

Else

{

Attachment = new Attachment (pathFileName, MediaTypeNames. Application. Octet );

}

ContentDisposition cd = attachment. ContentDisposition;

Cd. CreationDate = File. GetCreationTime (pathFileName );

Cd. ModificationDate = File. GetLastWriteTime (pathFileName );

Cd. ReadDate = File. GetLastAccessTime (pathFileName );

Mail. Attachments. Add (attachment );

 

}

}

SmtpClient client = new SmtpClient ();

Client. Host = txtSmtpServer. Text;

Client. Port = 25;

// Whether to use Secure Socket Layer for encrypted connection

Client. EnableSsl = rbtnUseSSL. Checked;

// Do not use the default credential. Note that this sentence must be placed on client. Credentials.

Client. usedefacrecredentials = false;

Client. Credentials = new NetworkCredential (txtSend. Text, txtPassword. Text );

// Emails are sent directly to the server over the network

Client. DeliveryMethod = SmtpDeliveryMethod. Network;

Try

{

Client. Send (mail );

MessageBox. Show ("sent successfully ");

}

Catch (SmtpException ex)

{

MessageBox. Show ("failed to send:" + ex. Message );

}

Catch (Exception ex)

{

MessageBox. Show ("failed to send:" + ex. Message );

}

Finally

{

Mail. Dispose ();

Client = null;

This. Cursor = Cursors. Default;

}

}

}

}

Copy code

 

The above is the complete code.

Project package: http://www.bkjia.com/uploadfile/2011/1210/20111210024614328.rar