Before you use the code below, you must add a reference to the System.Web to your project.
Right click on References on your project name in Visual Studio Solution Explorer, select Add Reference, then choose .NET and then select System.Web from the list and click OK. This will add System.Web reference to your project.
Now, you must import System.Web.Mail namespace to your project by adding this line to your code at the top of the class with other namespace references.
using Sytem.Web.Mail;
Let's say, in my Windows application, I have two buttons, Attach and Send. Here is the code that should be written on Attach and Send button click event handler.
On Attach button click event handler, I simply browse a file that will be attached to the mail.
On Send button click event handler, I create a MailMessage object, set its From, To, Subject, and Body properties. After that, I create an SmtpMail object and set SmtpServer to my server name. In the end, I call Send message by passing MailMessage to this method.
private void btnSend_Click(object
sender, EventArgs e) //writing code in Button btnSend
{
try
{
//MailMessage
class are used to construct e-mail messages
MailMessage message = new MailMessage();
//
Collaboration Data Objects (CDO) library allows you to access the Global
Address
// List and
other server objects, in addition to the contents of mailboxes
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate",
1);
//basic
authentication
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername",
"From@gmail.com");
//set your
username here
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword",
"From-Password");
//set your
password here
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl",
"True");
message.From = "From@gmail.com";
message.To = "to@gmail.com";
message.Subject = txtSubject.Text;
message.Body = txtMessage.Text;
if
(!txtAttach.Text.Equals("")) //adding attachments.
{
MailAttachment attach = new MailAttachment(txtAttach.Text);
if
(attach != null)
{
message.Attachments.Add(attach);
}
}
SmtpMail.SmtpServer = "smtp.gmail.com";
//The real
server goes here
SmtpMail.Send(message);
MessageBox.Show("Your message has been sent.", "Mail Sent",
MessageBoxButtons.OK,
MessageBoxIcon.None);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}//btnSend
//I have
to attach a file so,I created a button called btnAttach.
private void btnAttach_Click_1(object
sender, EventArgs e)
{
DialogResult clicked =
OpenattachDialog.ShowDialog();
if
(clicked.Equals(DialogResult.OK))
{
txtAttach.Text =
OpenattachDialog.FileName;
}
}//btnAttach