eml文件的解析和发送 [三角猫]
最近，我发布了几篇关于 .NET 和 EML 文件的邮件相关 的博文，引来了一些网友的关注与讨论。尤其是对于“如何解析EML文件的内容”和 “发送现有的EML文件”。目前，比较主流的解析EML文件的方式，基本是对MIME格式的分析，基于对 RFC822及其后续扩展的标准 的理解。但是，此种方法工作量太大，且过于繁琐。
我是个懒人，喜欢找捷径http://www.zu14.cn/coolemotion/emotions/zz_1.gif
大家都知道，微软的 outlook express 是可以保存和打开并发送EML文件的。那么很明显，outlook express 肯定是可以解析EML文件的。
问题就来了：我们可不可以利用微软现有的成果呢？
针对这个问题，我们再回到.NET中发送邮件的功能上，为了体现的明显，我们回到.NET 1.1上，.NET 1.1 发送邮件的是 System.Web.Mail ，这个System.Web.Mail 当时是比较弱的，原因就是它是基于 cdosys.dll 的基础上的且并未做富实现。
cdosys.dll是从windows 2000 开始被正式引入的，后续的操作系统都支持，关于cdosys.dll的细节，请看MSDN。
经过一个晚上对cdosys的研究，终于得出了结果：CDOSYS是可以加载eml文件并进行解析和直接发送的。
cdosys属于COM，在.NET使用，需要添加COM引用。
http://www.zu14.cn/wp-content/uploads/2009/05/image17.png
添加引用，会在项目的引用里出现下面的2项：
http://www.zu14.cn/wp-content/uploads/2009/05/image18.png
下面我对发送EML文件，封装了一个类（只做了基本封装，大家可以自己扩展）
<div class="cnblogs_code">http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifEML文件发送类
<!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--> 1http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif /**//// <summary>
2http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 功能： 发送EML文件
3http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 作者： 三角猫
4http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 网址： http://www.zu14.cn
5http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 声明： 转载务必保留此信息
6http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif /// </summary>
7http://www.cnblogs.com/Images/OutliningIndicators/None.gif public class EmlSender
8http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif http://www.cnblogs.com/Images/dot.gif{
9http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif private string emlFilePath;
10http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif private string smtpServer;
11http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif private string smtpServerPort = "25";
12http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif private string smtpUserName;
13http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif private string smtpPassword;
14http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
15http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 构造函数
16http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
17http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <param name="EmlFilePath">EML文件的绝对路径</param>
18http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public EmlSender(string EmlFilePath)
19http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
20http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif emlFilePath = EmlFilePath;
21http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
22http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
23http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
24http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// SMTP服务器地址
25http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
26http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public string SmtpServer
27http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
28http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif set http://www.cnblogs.com/Images/dot.gif{ smtpServer = value; }
29http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
30http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
31http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
32http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// SMTP服务器端口号
33http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
34http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public string SmtpServerPort
35http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
36http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif set http://www.cnblogs.com/Images/dot.gif{ smtpServerPort = value; }
37http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
38http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
39http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
40http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// SMTP服务器认证帐号
41http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
42http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public string SmtpUserName
43http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
44http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif set http://www.cnblogs.com/Images/dot.gif{ smtpUserName = value; }
45http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
46http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
47http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
48http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// SMTP服务器认证密码
49http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
50http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public string SmtpPassword
51http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
52http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif set http://www.cnblogs.com/Images/dot.gif{ smtpPassword = value; }
53http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
54http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
55http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
56http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 使用CDOSYS发送EML文件
57http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
58http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public void Send()
59http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
60http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif CDO.Message oMsg = new CDO.Message();
61http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif CDO.IConfiguration iConfg = oMsg.Configuration;
62http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif ADODB.Fields oFields = iConfg.Fields;
63http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
64http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif //设置CDO相关的发送参数，主要是用于SMTP服务器的认证
65http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif ADODB.Field oField = oFields["http://schemas.microsoft.com/cdo/configuration/sendusing"];
66http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = "2";
67http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
68http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"];
69http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = smtpServerPort;
70http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
71http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/smtpserver"];
72http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = smtpServer;
73http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
74http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/languagecode"];
75http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = "0x0804";
76http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
77http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif //下面三项可以自己根据需要去填写，我比较懒
78http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/sendemailaddress"];
79http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = "";
80http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
81http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/smtpuserreplyemailaddress"];
82http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = "";
83http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
84http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/smtpaccountname"];
85http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = "";
86http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif //------------------------
87http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
88http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/smtpconnectiontimeout"];
89http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = "60";
90http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
91http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/sendusername"];
92http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = smtpUserName;
93http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
94http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/sendpassword"];
95http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = smtpPassword;
96http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
97http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = oFields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"];
98http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField.Value = "1";
99http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
100http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oFields.Update();
101http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
102http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif try
103http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
104http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif //读取EML文件到CDO.MESSAGE，做分析的话，实际是用了下面的部分
105http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif ADODB.Stream stm = new ADODB.Stream();
106http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif stm.Open(System.Reflection.Missing.Value,
107http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif ADODB.ConnectModeEnum.adModeUnknown,
108http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif ADODB.StreamOpenOptionsEnum.adOpenStreamUnspecified,
109http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif "", "");
110http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif stm.Type = ADODB.StreamTypeEnum.adTypeBinary;//二进制方式读入
111http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
112http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif stm.LoadFromFile(emlFilePath); //将EML读入数据流
113http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
114http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oMsg.DataSource.OpenObject(stm, "_stream"); //将EML数据流载入到CDO.Message，要做解析的话，后面就可以了。
115http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
116http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif stm.Close();
117http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
118http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oMsg.Send(); //发送
119http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
120http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif catch
121http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
122http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif throw;
123http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
124http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif finally
125http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
126http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oField = null;
127http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oFields = null;
128http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif oMsg = null;
129http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
130http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
131http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif }
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