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   源码介绍

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
namespace SendMailMessage.Models
{
    public class EmailModel
    {
        [DisplayName("收件人")]
        [Required(ErrorMessage = "收件人不允许为空！")]
        [RegularExpression(@"(?i)(<[^>] >|[\w_])*@[\w.-] \.\w ",ErrorMessage="Emai格式不正确")]
        public string receiver { get; set; }
        [DisplayName("主题")]
        [Required(ErrorMessage = "主题不允许为空！")]
        public string subject { get; set; }
        [DisplayName("信件内容")]
        [Required(ErrorMessage = "信件内容不允许为空！")]
        public string body { get; set; }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using SendMailMessage.Uitls;
using SendMailMessage.Models;
namespace SendMailMessage.Controllers
{
    public class HomeController : Controller
    {
        //
        // GET: /Home/

        public ActionResult Index()
        {
            
            return View();
        }
        [HttpPost]
        public ActionResult Index(EmailModel model)
        {

            try
            {
                if (ModelState.IsValid)
                {
                    if (EMail.SendEmail(model.receiver, null, null, model.subject, model.body, null))
                    {
                       // TempData["message"] = "发送成功";
                        @ViewBag.message = "发送成功";
                        ModelState.Clear();//model信息 （表单数据）
                    }
                    else
                    {
                       // TempData["message"] = "发送失败";
                        @ViewBag.message = "发送失败";
                    }
                }
            }
            catch(Exception e)
            {
                ModelState.AddModelError("receiver", e.Message);
            }
            
         
            return View("Index");
           // RedirectToAction("Index");
        }

    }
}