Asp. NET combine COM components to send email

asp.net can find a file named Cdosys.dll in the System32 subdirectory of the system directory (such as C:\Winnt or C:\Windows), and we can call this COM component through ASP.net to send the email. CDOSYS is built on top of the SMTP protocol and NNTP protocol and is installed as a component of Windows2000 server. Of course, we can also use Exchange2000 Cdoex.dll to implement the mechanism of sending mail, because Cdosys.dll embedded into the operating system, so no longer to register the corresponding other mail-sending programs such as JMail.

1. Create a new project file

2, add the reference system directory under the Cdosys.dll file, in the reference will find added two to use the interface: CDO,ADODB

3, add a new item file sendmail.aspx, put three labels on its page, three textbox, the role is the recipient address, subject, content, place a button buttons.

4, switch to the code page, create content

public void Cdosendmail ()
{
Try
{
Cdos. Message MSG = new CDO. Message ();
Msg.from = "Rattlesnake@263.net";
Msg.to = this. TextBox1.Text.Trim ();
Msg.subject = this. TextBox2.Text.Trim ();
Msg.HTMLBody = "Cdos. IConfiguration Config = msg.configuration;
ADODB. Fields ofields = Config.fields;
ofields["Http://schemas.microsoft.com/cdo/configuration/sendusing"]. Value = 2;
ofields["Http://schemas.microsoft.com/cdo/configuration/sendusername"]. Value= "Rattlesnake";
ofields["Http://schemas.microsoft.com/cdo/configuration/sendpassword"]. Value= "Pass";
ofields["Http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"]. value=1;
ofields["Http://schemas.microsoft.com/cdo/configuration/languagecode"]. value=0x0804;
ofields["Http://schemas.microsoft.com/cdo/configuration/smtpserver"]. Value= "Smtp.263.net";
Ofields.update ();

Msg.BodyPart.Charset = "gb2312";
Msg.HTMLBodyPart.Charset = "gb2312";
　
Msg.send ();
MSG = null;
}
catch (Exception err)
{
throw err;
}
}

5. Add Click event for button

private void Button1_Click (object sender, System.EventArgs e)
{
This. Cdosendmail ();
}

You can run the program.