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  • 一个发送邮件的小例子

     public partial class SendMail : Form
        {
            string text = string.Empty;
            public SendMail()
            {
                InitializeComponent();
            }

            private void button1_Click(object sender, EventArgs e)
            {
                string fromAddress=Txt_From.Text.Trim();
                string username = fromAddress.Substring(0,fromAddress.IndexOf("@"));
                string mailServer = "smtp." + fromAddress.Substring(fromAddress.IndexOf("@") + 1);
                string fromcheck = CheckMailAddress(Txt_From.Text.Trim());
               if(!string.IsNullOrEmpty(fromcheck))
               {
                 Txt_From.Focus();
                 MessageBox.Show("邮箱"+fromcheck+"存在问题!");
                 return ;
               }
               string toAddress=Txt_To.Text.Trim();
               string toCheck=CheckMailAddress(toAddress);
               if(!string.IsNullOrEmpty(toCheck))
               {
                 Txt_To.Focus();
                 MessageBox.Show("邮箱"+fromcheck+"存在问题!");
                 return;
               }
               //lijinchang3@163.com;lijc@finchina.com
               //webBrowser1.DocumentText = "测试邮件发送!";
               MailAddress from = new MailAddress(fromAddress);
               MailAddress to = new MailAddress(toAddress);
               MailMessage mailobj = new MailMessage(from, to);
               mailobj.Subject = Txt_Subject.Text.Trim();
               mailobj.Body = webBrowser1.DocumentText;//发送的信息
               mailobj.IsBodyHtml = true;
               mailobj.BodyEncoding = System.Text.Encoding.GetEncoding("GB2312");
               //邮件优先级
               mailobj.Priority = MailPriority.High;
               string []cc = Txt_CC.Text.Trim().Split(new string[] { ";" }, StringSplitOptions.RemoveEmptyEntries);
               foreach (string c in cc)
               {
                   mailobj.CC.Add(c);
               }
               //Initializes a new instance of the System.Net.Mail.SmtpClient class
               //that sends e-mail by using the specified SMTP server.
               SmtpClient smtp = new SmtpClient(mailServer);
               //或者用:
               //SmtpClient smtp = new SmtpClient();
               //smtp.Host = mailServer;

               //不使用默认凭据访问服务器
               smtp.UseDefaultCredentials = false;
               string userPswd = "2323132";
               smtp.Credentials = new NetworkCredential(username, userPswd);
               //使用network发送到smtp服务器
               smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
               try
               {
                   //开始发送邮件
                   smtp.Send(mailobj);
                   webBrowser1.DocumentText = "测试邮件已发送!";
                   Thread.Sleep(100);
                   webBrowser1.DocumentText = text;
               }
               catch (Exception ex)
               {
                   Console.WriteLine(ex.Message);
                   Console.WriteLine(ex.StackTrace);
               }

            }
            private string  CheckMailAddress(string adress)
            {
                string [] adds=adress.Split(new string[]{";"},StringSplitOptions.RemoveEmptyEntries);
                foreach (string ad in adds)
                {
                    if (!new Regex(@"(?:[a-z\d]+[_\-\+\.]?)*[a-z\d]+@(?:([a-z\d]+\-?)*[a-z\d]+\.)+([a-z]{2,})+", RegexOptions.IgnoreCase).IsMatch(ad))
                    {
                        return ad;
                    }

                }
                return string.Empty;
            }

            private void SendMail_Load(object sender, EventArgs e)
            {

            }

            private void button2_Click(object sender, EventArgs e)
            {
                OpenFileDialog opendialog = new OpenFileDialog();
                opendialog.Filter = "html(*.htm;*.html)|*.html;*.htm";
                opendialog.Title = "选择发送文件";
                if (DialogResult.OK == opendialog.ShowDialog())
                {
                    text = File.ReadAllText(opendialog.FileName, Encoding.Default);
                    webBrowser1.DocumentText = text;
                }
            }
        }

    定义界面

    partial class SendMail
        {
            /// <summary>
            /// Required designer variable.
            /// </summary>
            private System.ComponentModel.IContainer components = null;

            /// <summary>
            /// Clean up any resources being used.
            /// </summary>
            /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
            protected override void Dispose(bool disposing)
            {
                if (disposing && (components != null))
                {
                    components.Dispose();
                }
                base.Dispose(disposing);
            }

            #region Windows Form Designer generated code

            /// <summary>
            /// Required method for Designer support - do not modify
            /// the contents of this method with the code editor.
            /// </summary>
            private void InitializeComponent()
            {
                this.Txt_From = new System.Windows.Forms.TextBox();
                this.Txt_To = new System.Windows.Forms.TextBox();
                this.lb1 = new System.Windows.Forms.Label();
                this.label1 = new System.Windows.Forms.Label();
                this.label2 = new System.Windows.Forms.Label();
                this.Txt_Subject = new System.Windows.Forms.TextBox();
                this.label3 = new System.Windows.Forms.Label();
                this.webBrowser1 = new System.Windows.Forms.WebBrowser();
                this.button1 = new System.Windows.Forms.Button();
                this.Txt_CC = new System.Windows.Forms.TextBox();
                this.label4 = new System.Windows.Forms.Label();
                this.button2 = new System.Windows.Forms.Button();
                this.SuspendLayout();
                //
                // Txt_From
                //
                this.Txt_From.Location = new System.Drawing.Point(118, 24);
                this.Txt_From.Name = "Txt_From";
                this.Txt_From.Size = new System.Drawing.Size(305, 21);
                this.Txt_From.TabIndex = 0;
                //
                // Txt_To
                //
                this.Txt_To.Location = new System.Drawing.Point(118, 52);
                this.Txt_To.Name = "Txt_To";
                this.Txt_To.Size = new System.Drawing.Size(305, 21);
                this.Txt_To.TabIndex = 1;
                //
                // lb1
                //
                this.lb1.AutoSize = true;
                this.lb1.Location = new System.Drawing.Point(60, 27);
                this.lb1.Name = "lb1";
                this.lb1.Size = new System.Drawing.Size(41, 12);
                this.lb1.TabIndex = 2;
                this.lb1.Text = "发送人";
                //
                // label1
                //
                this.label1.AutoSize = true;
                this.label1.Location = new System.Drawing.Point(60, 55);
                this.label1.Name = "label1";
                this.label1.Size = new System.Drawing.Size(41, 12);
                this.label1.TabIndex = 3;
                this.label1.Text = "接受人";
                //
                // label2
                //
                this.label2.AutoSize = true;
                this.label2.Location = new System.Drawing.Point(62, 109);
                this.label2.Name = "label2";
                this.label2.Size = new System.Drawing.Size(29, 12);
                this.label2.TabIndex = 4;
                this.label2.Text = "标题";
                //
                // Txt_Subject
                //
                this.Txt_Subject.Location = new System.Drawing.Point(118, 109);
                this.Txt_Subject.Name = "Txt_Subject";
                this.Txt_Subject.Size = new System.Drawing.Size(491, 21);
                this.Txt_Subject.TabIndex = 5;
                //
                // label3
                //
                this.label3.AutoSize = true;
                this.label3.Location = new System.Drawing.Point(50, 134);
                this.label3.Name = "label3";
                this.label3.Size = new System.Drawing.Size(29, 12);
                this.label3.TabIndex = 6;
                this.label3.Text = "正文";
                //
                // webBrowser1
                //
                this.webBrowser1.Location = new System.Drawing.Point(52, 149);
                this.webBrowser1.MinimumSize = new System.Drawing.Size(20, 20);
                this.webBrowser1.Name = "webBrowser1";
                this.webBrowser1.Size = new System.Drawing.Size(722, 431);
                this.webBrowser1.TabIndex = 7;
                //
                // button1
                //
                this.button1.Location = new System.Drawing.Point(146, 605);
                this.button1.Name = "button1";
                this.button1.Size = new System.Drawing.Size(75, 23);
                this.button1.TabIndex = 8;
                this.button1.Text = "发送";
                this.button1.UseVisualStyleBackColor = true;
                this.button1.Click += new System.EventHandler(this.button1_Click);
                //
                // Txt_CC
                //
                this.Txt_CC.Location = new System.Drawing.Point(118, 80);
                this.Txt_CC.Name = "Txt_CC";
                this.Txt_CC.Size = new System.Drawing.Size(491, 21);
                this.Txt_CC.TabIndex = 9;
                //
                // label4
                //
                this.label4.AutoSize = true;
                this.label4.Location = new System.Drawing.Point(62, 83);
                this.label4.Name = "label4";
                this.label4.Size = new System.Drawing.Size(29, 12);
                this.label4.TabIndex = 10;
                this.label4.Text = "抄送";
                //
                // button2
                //
                this.button2.Location = new System.Drawing.Point(671, 106);
                this.button2.Name = "button2";
                this.button2.Size = new System.Drawing.Size(103, 23);
                this.button2.TabIndex = 11;
                this.button2.Text = "导入发送信息";
                this.button2.UseVisualStyleBackColor = true;
                this.button2.Click += new System.EventHandler(this.button2_Click);
                //
                // SendMail
                //
                this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
                this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
                this.ClientSize = new System.Drawing.Size(818, 643);
                this.Controls.Add(this.button2);
                this.Controls.Add(this.label4);
                this.Controls.Add(this.Txt_CC);
                this.Controls.Add(this.button1);
                this.Controls.Add(this.webBrowser1);
                this.Controls.Add(this.label3);
                this.Controls.Add(this.Txt_Subject);
                this.Controls.Add(this.label2);
                this.Controls.Add(this.label1);
                this.Controls.Add(this.lb1);
                this.Controls.Add(this.Txt_To);
                this.Controls.Add(this.Txt_From);
                this.Name = "SendMail";
                this.Text = "SendMail";
                this.Load += new System.EventHandler(this.SendMail_Load);
                this.ResumeLayout(false);
                this.PerformLayout();

            }

            #endregion

            private System.Windows.Forms.TextBox Txt_From;
            private System.Windows.Forms.TextBox Txt_To;
            private System.Windows.Forms.Label lb1;
            private System.Windows.Forms.Label label1;
            private System.Windows.Forms.Label label2;
            private System.Windows.Forms.TextBox Txt_Subject;
            private System.Windows.Forms.Label label3;
            private System.Windows.Forms.WebBrowser webBrowser1;
            private System.Windows.Forms.Button button1;
            private System.Windows.Forms.TextBox Txt_CC;
            private System.Windows.Forms.Label label4;
            private System.Windows.Forms.Button button2;
        }

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  • 原文地址:https://www.cnblogs.com/lijinchang/p/2153340.html
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