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#.
Note The Cdosys.dll library is also known as CDOSYS.
To use CDOSYS as described in the "Summary" section, follow these steps:
Start Microsoft Visual Studio.
On the File menu, click New, and then click Project.
Under Project Types, click Visual C#, and then click Console Application under Templates. By default, Program.cs is created.
Note In Microsoft Visual C# .NET 2003, Visual C# is changed to Visual C# Projects. By default, Class1.cs is created.
Add a reference to the Microsoft CDO For Windows 2000 Library. To do this, follow these steps:
On the Project menu, click Add Reference.
On the COM tab, locate Microsoft CDO For Windows 2000 Library.
Note In Visual C# .NET 2003, click Select.
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;
}
}
}
Where TODO appears in the code, modify the code as indicated.
To build and run the program, press F5.
Verify that the e-mail message has been both sent and received.
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