发送邮件

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Web.Mail;

namespace MyMail
{
    /**//// <summary>
    /// Summary description for Form1.
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.TextBox txtSender;
        private System.Windows.Forms.TextBox txtRecipient;
        private System.Windows.Forms.TextBox txtSubject;
        private System.Windows.Forms.TextBox txtText;
        private System.Windows.Forms.TextBox txtAttachments;
        private System.Windows.Forms.Button btnAttachments;
        private System.Windows.Forms.Button btnSend;
        private System.Windows.Forms.OpenFileDialog openFileDialog1;
        private System.Windows.Forms.Button btnExit;

        MailMessage message = new MailMessage();
        /**//// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form1()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /**//// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        Windows Form Designer generated code#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.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.label3 = new System.Windows.Forms.Label();
            this.label4 = new System.Windows.Forms.Label();
            this.txtSender = new System.Windows.Forms.TextBox();
            this.txtRecipient = new System.Windows.Forms.TextBox();
            this.txtSubject = new System.Windows.Forms.TextBox();
            this.txtText = new System.Windows.Forms.TextBox();
            this.txtAttachments = new System.Windows.Forms.TextBox();
            this.btnAttachments = new System.Windows.Forms.Button();
            this.btnSend = new System.Windows.Forms.Button();
            this.btnExit = new System.Windows.Forms.Button();
            this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
            this.SuspendLayout();
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(24, 16);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(104, 16);
            this.label1.TabIndex = 0;
            this.label1.Text = "发件人：";
            // 
            // label2
            // 
            this.label2.Location = new System.Drawing.Point(24, 48);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(104, 16);
            this.label2.TabIndex = 1;
            this.label2.Text = "收件人：";
            // 
            // label3
            // 
            this.label3.Location = new System.Drawing.Point(24, 80);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(104, 16);
            this.label3.TabIndex = 2;
            this.label3.Text = "主题：";
            // 
            // label4
            // 
            this.label4.Location = new System.Drawing.Point(24, 112);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(104, 24);
            this.label4.TabIndex = 3;
            this.label4.Text = "附件：";
            // 
            // txtSender
            // 
            this.txtSender.Location = new System.Drawing.Point(144, 16);
            this.txtSender.Name = "txtSender";
            this.txtSender.Size = new System.Drawing.Size(208, 21);
            this.txtSender.TabIndex = 5;
            this.txtSender.Text = "";
            // 
            // txtRecipient
            // 
            this.txtRecipient.Location = new System.Drawing.Point(144, 48);
            this.txtRecipient.Name = "txtRecipient";
            this.txtRecipient.Size = new System.Drawing.Size(208, 21);
            this.txtRecipient.TabIndex = 6;
            this.txtRecipient.Text = "";
            // 
            // txtSubject
            // 
            this.txtSubject.Location = new System.Drawing.Point(144, 80);
            this.txtSubject.Name = "txtSubject";
            this.txtSubject.Size = new System.Drawing.Size(208, 21);
            this.txtSubject.TabIndex = 7;
            this.txtSubject.Text = "";
            // 
            // txtText
            // 
            this.txtText.Location = new System.Drawing.Point(24, 184);
            this.txtText.Multiline = true;
            this.txtText.Name = "txtText";
            this.txtText.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
            this.txtText.Size = new System.Drawing.Size(328, 104);
            this.txtText.TabIndex = 9;
            this.txtText.Text = "";
            // 
            // txtAttachments
            // 
            this.txtAttachments.Location = new System.Drawing.Point(144, 112);
            this.txtAttachments.Multiline = true;
            this.txtAttachments.Name = "txtAttachments";
            this.txtAttachments.ReadOnly = true;
            this.txtAttachments.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
            this.txtAttachments.Size = new System.Drawing.Size(208, 48);
            this.txtAttachments.TabIndex = 8;
            this.txtAttachments.Text = "";
            // 
            // btnAttachments
            // 
            this.btnAttachments.Location = new System.Drawing.Point(24, 304);
            this.btnAttachments.Name = "btnAttachments";
            this.btnAttachments.TabIndex = 10;
            this.btnAttachments.Text = "附件";
            this.btnAttachments.Click += new System.EventHandler(this.btnAttachments_Click);
            // 
            // btnSend
            // 
            this.btnSend.Location = new System.Drawing.Point(152, 304);
            this.btnSend.Name = "btnSend";
            this.btnSend.TabIndex = 11;
            this.btnSend.Text = "发送";
            this.btnSend.Click += new System.EventHandler(this.btnSend_Click);
            // 
            // btnExit
            // 
            this.btnExit.Location = new System.Drawing.Point(280, 304);
            this.btnExit.Name = "btnExit";
            this.btnExit.TabIndex = 12;
            this.btnExit.Text = "退出";
            this.btnExit.Click += new System.EventHandler(this.btnCancel_Click);
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(368, 341);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.btnExit,
                                                                          this.btnSend,
                                                                          this.btnAttachments,
                                                                          this.txtText,
                                                                          this.txtAttachments,
                                                                          this.txtSubject,
                                                                          this.txtRecipient,
                                                                          this.txtSender,
                                                                          this.label4,
                                                                          this.label3,
                                                                          this.label2,
                                                                          this.label1});
            this.Name = "Form1";
            this.Text = "E-Mailer";
            this.ResumeLayout(false);

        }
        #endregion

        /**//// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        private void btnCancel_Click(object sender, System.EventArgs e)
        {
            Application.Exit();
        }

        private void btnAttachments_Click(object sender, System.EventArgs e)
        {
            openFileDialog1.ShowDialog();
            MailAttachment attachment  = new MailAttachment(openFileDialog1.FileName);
            txtAttachments.Text = txtAttachments.Text + openFileDialog1.FileName;
            message.Attachments.Add(attachment);
        }

        private void btnSend_Click(object sender, System.EventArgs e)
        {
            message.From = txtSender.Text;
            message.To = txtRecipient.Text;
            message.Subject = txtSubject.Text;
            message.Body = txtText.Text;
            SmtpMail.Send(message);
            MessageBox.Show("邮件成功发送!");
        }
    }
}

 

程序附图片如下