webform1.aspx.cs

此为发送带附件的电子邮件程序

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Web.Mail ;

namespace EmailPage
{
	/// <summary>
	/// WebForm1 的摘要说明。
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.TextBox txtTo;
		protected System.Web.UI.WebControls.TextBox txtFrom;
		protected System.Web.UI.WebControls.TextBox txtSubject;
		protected System.Web.UI.WebControls.TextBox txtBody;
		protected System.Web.UI.WebControls.DropDownList ddPriority;
		protected System.Web.UI.WebControls.Button btnSend;
		protected System.Web.UI.HtmlControls.HtmlInputFile File1;
		protected System.Web.UI.WebControls.DropDownList ddBodyFormat;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.btnSend.Click += new System.EventHandler(this.btnSend_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btnSend_Click(object sender, System.EventArgs e)
		{
			//创建一个MailMessage对象
			MailMessage aMail = new MailMessage();
			//收信人地址
			aMail.To = txtTo.Text ;
			//发信人地址
			aMail.From = txtFrom.Text ;
			//主题
			aMail.Subject = txtSubject.Text;
			//正文
			aMail.Body = txtBody.Text ;
			//优先级
			aMail.Priority = (MailPriority)ddPriority.SelectedIndex ;
			//正文格式
			aMail.BodyFormat = (MailFormat)ddBodyFormat.SelectedIndex ;
			ddPriority.SelectedIndex = 1;
			ddBodyFormat.SelectedIndex = 0;
			
			if (File1.PostedFile.FileName  != "" )
			{
				//上传文件的文件名（含完整路径）
				string fileName = File1.PostedFile.FileName ;
				fileName = fileName.Substring (fileName.LastIndexOf (@"\"));
				//使用SaveAs方法，将文件保存在项目路径\temp目录下，
				//需要在项目路径下创建temp目录
				fileName = Server.MapPath(@"\temp\" + fileName);
				File1.PostedFile.SaveAs (fileName);
				//添加附件
				aMail.Attachments.Add(new MailAttachment(fileName));
			}
			
			string result = "";
			try
			{
				//发送邮件
				SmtpMail.Send(aMail);
				result = "Email 发送成功！";
			}
			catch(Exception ex)
			{
				result = "Email 发送失败。" + ex.Message ;
			}
			Response.Write ("<script language='JavaScript'>window.alert('" + result + "');</script>");
		}
	}
}