利用win2k系统的cdosys.dll库发送带附件的邮件之办法

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本文介绍如何使用Cdosys.dll库通过C#发送带附件的电子邮件。首先启动Microsoft Visual Studio.NET创建项目，添加对Microsoft CDO For Windows 2000 Library的引用，然后给出示例代码，最后说明修改代码、构建运行程序及验证邮件收发的步骤。

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How to use the Cdosys.dll library to send an e-mail with attachments

View products that this article applies to.

This article was previously published under Q310212

SUMMARY

This article describes how to use the Collaboration Data Objects (CDO) for Windows 2000 library (Cdosys.dll) to send an e-mail message with attachments. You can send text or HTML or a Web page in the body of the e-mail message by using the local SMTP server or by using a smart host server in Microsoft Visual C# .NET.

Note The Cdosys.dll library is also known as CDOSYS.

MORE INFORMATION

To use CDOSYS as described in the "Summary" section, follow these steps:

Start Microsoft Visual Studio .NET.
On the File menu, click New, and then click Project.
Under Project Types, click Visual C# Projects, and then click Console Application under Templates. By default, Class1.cs is created.
Add a reference to the Microsoft CDO For Windows 2000 Library. To do this, follow these steps:
1. On the Project menu, click Add Reference.
2. On the COM tab, locate Microsoft CDO For Windows 2000 Library, and then click Select.
3. To accept your selections, click OK in the Add References dialog box.
  
  If you receive a dialog box to generate wrappers for the libraries that you selected, click Yes.

In the code window, replace all the code with the following code:

namespace CdoSys
{
	using System;
	class Class1
	{
		static void Main(string[] args)
		{
			try 
			{			
				CDO.Message oMsg = new CDO.Message();
				CDO.IConfiguration iConfg; 

				iConfg = oMsg.Configuration;

				ADODB.Fields oFields;
				oFields = iConfg.Fields;       

				// Set configuration.
				ADODB.Field oField = oFields["http://schemas.microsoft.com/cdo/configuration/sendusing"];
                        
				//TODO: To send by using the smart host, uncomment the following lines:
				//oField.Value = CDO.CdoSendUsing.cdoSendUsingPort;
				//oField = oFields["http://schemas.microsoft.com/cdo/configuration/smtpserver"];
				//oField.Value = "smarthost";

				// TODO: To send by using local SMTP service. 
				//oField = oFields["http://schemas.microsoft.com/cdo/configuration/sendusing"];
				//oField.Value = 1;  

				oFields.Update();

				// Set common properties from message.

				//TODO: To send text body, uncomment the following line: 
				//oMsg.TextBody = "Hello, how are you doing?";
			

				//TODO: To send HTML body, uncomment the following lines:
				//String sHtml;
				//sHtml = "<HTML>/n" + 
				//	"<HEAD>/n" +
				//	"<TITLE>Sample GIF</TITLE>/n" +
				//	"</HEAD>/n" +
				//	"<BODY><P>/n" + 
				//	"<h1><Font Color=Green>Inline graphics</Font></h1>/n" +
				//	"</BODY>/n" + 
				//	"</HTML>";
				//oMsg.HTMLBody = sHtml;

				//TOTO: To send WEb page in an e-mail, uncomment the following lines and make changes in TODO section.
				//TODO: Replace with your preferred Web page
				//oMsg.CreateMHTMLBody("http://www.microsoft.com",
				//	CDO.CdoMHTMLFlags.cdoSuppressNone, 
				//	"", ""); 
				oMsg.Subject = "Test SMTP";  

				//TODO: Change the To and From address to reflect your information.                       
				oMsg.From = "someone@example.com";
				oMsg.To = "someone@example.com";
				//ADD attachment.
				//TODO: Change the path to the file that you want to attach.
				oMsg.AddAttachment("C://Hello.txt", "", "");
				oMsg.AddAttachment("C://Test.doc", "", "");
                                    oMsg.Send();
			}
			catch (Exception e)
			{
				Console.WriteLine("{0} Exception caught.", e);
			}
			return;
		}
	}
}