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   源码介绍

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使用c#写的基于163发送邮箱的一个pc客户端

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.Mail;
using System.Net.Mime;
using System.Net;
using System.IO;


namespace SendEmail
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.ImeMode = ImeMode.Hangul;
        }

        //窗体的Load事件
        private void Form1_Load(object sender, EventArgs e)
        {

            FWQAddress();
            txtUserName.Text = "xiuwzi";
            txtPassword.Text = "*******";
            txtEmail.Text = "24320187@qq.com";
            txtSubject.Text = "测试一下";
            rtxtBody.Text = "测试一下";
            txtDisplayName.Text = "Microera";
        }

        private void FWQAddress()
        {
            //添加俩个smpt服务器的名称
            //cmbBoxSMTP.Items.Add("smtp.qq.com");
            cmbBoxSMTP.Items.Add("smtp.163.com");
            cmbBoxSMTP.Items.Add("smtp.162.com");
            cmbBoxSMTP.Items.Add("smtp.gmail.com");
            //设置为下拉列表
            cmbBoxSMTP.DropDownStyle = ComboBoxStyle.DropDownList;
            //默认选中第一个选项
            cmbBoxSMTP.SelectedIndex = 0;
            //在下面添加你想要初始化的内容，比如显示姓名、用户名等
        }
        //添加按钮的单击事件
        private void btnAdd_Click(object sender, EventArgs e)
        {
            //定义并初始化一个OpenFileDialog类的对象
            OpenFileDialog openFile = new OpenFileDialog();
            openFile.InitialDirectory = Application.StartupPath;
            openFile.FileName = "";
            openFile.RestoreDirectory = true;
            openFile.Multiselect = false;

            //显示打开文件对话框，并判断是否单击了确定按钮
            if (openFile.ShowDialog() == DialogResult.OK)
            {
                //得到选择的文件名
                string fileName = openFile.FileName;
                //将文件名添加到TreeView中
                treeViewFileList.Nodes.Add(fileName);
            }
        }

        //删除按钮的单击事件
        private void btnDelete_Click(object sender, EventArgs e)
        {
            //判断是否选中了节点
            if (treeViewFileList.SelectedNode != null)
            {
                //得到选择的节点
                TreeNode tempNode = treeViewFileList.SelectedNode;
                //删除选中的节点
                treeViewFileList.Nodes.Remove(tempNode);
            }
            else
            {
                MessageBox.Show("请选择要删除的附件。");
            }
        }

        //发送按钮的单击事件
        private void btnSend_Click(object sender, EventArgs e)
        {           
            //list1.Items.Add("警告" "---" txtEmail.Text "---" "发送异常！");
            try
            {
                //确定smtp服务器地址。实例化一个Smtp客户端
                System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient(cmbBoxSMTP.Text);
                //生成一个发送地址
                string strFrom = string.Empty;
                //if (cmbBoxSMTP.SelectedText == "smtp.163.com")
                strFrom = txtUserName.Text "@163.com";
                //else
                //    strFrom = txtUserName.Text "@gmail.com";

                //构造一个发件人地址对象
                MailAddress from = new MailAddress(strFrom, txtDisplayName.Text, Encoding.UTF8);
                //构造一个收件人地址对象
                MailAddress to = new MailAddress(txtEmail.Text, txtToName.Text, Encoding.UTF8);

                //构造一个Email的Message对象
                MailMessage message = new MailMessage(from, to);

                //为 message 添加附件
                foreach (TreeNode treeNode in treeViewFileList.Nodes)
                {
                    //得到文件名
                    string fileName = treeNode.Text;
                    //判断文件是否存在
                    if (File.Exists(fileName))
                    {
                        //构造一个附件对象
                        Attachment attach = new Attachment(fileName);
                        //得到文件的信息
                        ContentDisposition disposition = attach.ContentDisposition;
                        disposition.CreationDate = System.IO.File.GetCreationTime(fileName);
                        disposition.ModificationDate = System.IO.File.GetLastWriteTime(fileName);
                        disposition.ReadDate = System.IO.File.GetLastAccessTime(fileName);
                        //向邮件添加附件
                        message.Attachments.Add(attach);
                    }
                    else
                    {
                        MessageBox.Show("文件" fileName "未找到！");
                    }
                }

                //添加邮件主题和内容
                message.Subject = txtSubject.Text;
                message.SubjectEncoding = Encoding.UTF8;
                message.Body = rtxtBody.Text;
                message.BodyEncoding = Encoding.UTF8;

                //设置邮件的信息
                client.DeliveryMethod = SmtpDeliveryMethod.Network;
                message.BodyEncoding = System.Text.Encoding.UTF8;
                message.IsBodyHtml = false;

                //如果服务器支持安全连接，则将安全连接设为true。
                //gmail支持，163不支持，如果是gmail则一定要将其设为true
                if (cmbBoxSMTP.SelectedText == "smpt.163.com")
                    client.EnableSsl = false;
                else
                    client.EnableSsl = true;

                //设置用户名和密码。
                //string userState = message.Subject;
                client.UseDefaultCredentials = false;
                string username = txtUserName.Text;
                string passwd = txtPassword.Text;
                //用户登陆信息
                NetworkCredential myCredentials = new NetworkCredential(username, passwd);
                client.Credentials = myCredentials;
                //发送邮件
                client.Send(message);
                //提示发送成功
               // MessageBox.Show("发送成功!");
                list1.Items.Add("恭喜" "---" txtEmail.Text "---" "发送成功！");               
            }
            catch (Exception ex)
            {
               // MessageBox.Show(ex.Message, "发送异常");
                list1.Items.Add("警告" "- - -" txtEmail.Text "- - -" "发送异常！");
            }
        }