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C#简单实现在网页上发邮件的案例

2019年07月18日  | 移动技术网IT编程  | 我要评论

1.前端html使用了jquery，大家如果做演示不要忘记引入jquery的库

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title></title>
  <script src="jquery-1.8.0.min.js" type="text/javascript"></script>
  <script type="text/javascript">
    function sendemail() {
      var smtp = $('#txtsmtp').val();
      var content = $('#txtcontent').val();
      var title = $('#txttitle').val();
      var from = $('#txtfrom').val();
      var to = $('#txtto').val();
      $.post("handler.ashx", { 'smtp': smtp, 'content': content,'title':title, 'from': from, 'to': to },
    function (data) {
      var n = eval('(' + data + ')');
      if (n.success) {
        alert(n.message);
      }
    });
    
    }
  </script>
</head>
<body>
  <table>
    <tr><td>smtp:</td>
      <td><input type="text" id = "txtsmtp" value="smtp server" />
      </td>
    </tr>
    
    <tr><td>from addr:</td>
      <td><input type="text" id = "txtfrom" value="xxx@xxx.com" />
      </td>
    </tr>

    <tr><td>to addr:</td>
      <td><input type="text" id = "txtto" value="xxx@xxx.com" />
      </td>
    </tr>

    <tr><td>title:</td>
      <td><input type="text" id = "txttitle" value="title" />
      </td>
    </tr>

    <tr><td>content:</td>
      <td><input type="text" id = "txtcontent" value="content" />
      
      </td>
    </tr>
    <tr>
      <td>
        <input type="button" id="btnsend" value="send" onclick="sendemail()"/>
      </td>
    </tr>
  </table>
</body>
</html>

2.后台代码是一般处理类 ashx，供前台异步调用

<%@ webhandler language="c#" class="handler" %>

using system;
using system.web;
using utility;
public class handler : ihttphandler {
  
  public void processrequest (httpcontext context)
  {
    context.response.contenttype = "text/plain";
    string smtp = httpcontext.current.request.form["smtp"].tostring();
    string title = httpcontext.current.request.form["title"].tostring();
    string content = httpcontext.current.request.form["content"].tostring();
    string from = httpcontext.current.request.form["from"].tostring();
    string to = httpcontext.current.request.form["to"].tostring();
    
    
    try
    {
      emailclient emailclient = new emailclient(smtp);// localhost::25
      emailclient.sendemail(from, to, title, content);
      system.web.script.serialization.javascriptserializer jss = new system.web.script.serialization.javascriptserializer();
      system.collections.generic.dictionary<string, object> d = new system.collections.generic.dictionary<string, object>();
      d.add("message", "success");
      d.add("success", true);
      context.response.write(jss.serialize(d));
    }
    catch (exception ex)
    {
      system.web.script.serialization.javascriptserializer jss = new system.web.script.serialization.javascriptserializer();
      system.collections.generic.dictionary<string, object> d = new system.collections.generic.dictionary<string, object>();
      d.add("message", ex.message);
      d.add("success", true);
      context.response.write(jss.serialize(d));
    }
    
      
  }
 
  public bool isreusable {
    get {
      return false;
    }
  }

}

3.最后是用到的smtp辅助类

public class emailclient
  {
    private string smtpserver;
    private string senderaddress;

    
    public emailclient(string smtpserver)
    {
      this.smtpserver = smtpserver;
      this.senderaddress = string.empty;
    }

 　　public void sendemail(string fromaddress, string toaddress, string subject, string messagebody)
    {
      smtpclient smtp = new smtpclient(smtpserver);

      mailmessage email = new mailmessage();

      email.from = new mailaddress(fromaddress);
      email.to.add(toaddress);
      email.subject = subject;
      email.body = messagebody;

      smtp.send(email);
    }

}

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