C# Program Send Mail Google

Postingan kali  ini saya coba akan buat postingan yang berbau koding - koding gitu :) Bahasa pemrograman yang akan saya bahas disini yaitu C#. C# memang ada yang berbasis console dan ada yang berbasis Windows Form, yang berbasis console kodingannya gak jauh - jauh beda lah sama C++, maka dari itu saya pilih memposting C# yang berbasis Form aja, dan postingan pertama C# Windows Form saya akan membahas tentang Program Send Mail Google. Dalam kodingnya kita akan menggunakan SMTP dari google, yaitu "smtp.gmail.com". Nanti setelah Program dijalankan, akan ada pengecekan terhadap email yang kita gunakan untuk mengirim email, apakah email yang kita gunakan itu valid atau tidak.

Silahkan Buat desain Formnya terlebih dahulu

Spoiler:

Disini menggunakn 6 textbox, 2 Button, 6 Label, dan 3 GroupBox, 1 Tools OpenFileDialog.
Ubah Name TextBox pertama menjadi textBoxfrom
TextBox kedua menjadi textBoxpass
TextBox ketiga menjadi textBoxto
TextBox keempat menjadi textBoxsub
TextBox kelima menjadi textBoxBody
TextBox keenam menjadi textBox1

Ubah name label Change User menjadi CU dan Set visible label'a menjadi False

Klik Kanan pada form --> View Code, kemudian tambahkan sebuah library mail

using System.Net.Mail; 

Klik 2 kali label Change User, kemudian tambahkan code berikut

textBoxfrom.Enabled = true;
textBoxpass.Enabled = true;
textBoxfrom.Text = "";
textBoxpass.Text = "";
CU.Visible = false;

Klik 2 kali pada button Browse, kemudian tambahkan code berikut

DialogResult result = openFileDialog1.ShowDialog();
if (result == DialogResult.OK)
{
       string file = openFileDialog1.FileName;
       textBox1.Text = file;
}

Klik 2 kali pada button Send Mail, kemudian isi code berikut

try
            {
                if (textBoxto.Text == "" || textBoxsub.Text == "" || textBoxBody.Text == "")
                {
                    MessageBox.Show("Periksa Kolom Dengan Benar", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }

                else if (textBox1.Text == "")
                {
                    MailMessage mail = new MailMessage();
                    SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
                    mail.From = new MailAddress(textBoxfrom.Text);
                    mail.To.Add(textBoxto.Text);
                    mail.Subject = textBoxsub.Text;
                    mail.Body = textBoxBody.Text;
                    SmtpServer.Port = 587;
                    SmtpServer.Credentials = new System.Net.NetworkCredential(textBoxfrom.Text, textBoxpass.Text);
                    SmtpServer.EnableSsl = true;
                    SmtpServer.Send(mail);
                    MessageBox.Show("Mail Send", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    textBoxfrom.Enabled = false;
                    textBoxpass.Enabled = false;
                    textBoxto.Text = "";
                    textBoxsub.Text = "";
                    textBoxBody.Text = "";
                    CU.Visible = true;
                }

                else
                {
                    MailMessage mail = new MailMessage();
                    SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
                    mail.From = new MailAddress(textBoxfrom.Text);
                    mail.To.Add(textBoxto.Text);
                    mail.Subject = textBoxsub.Text;
                    mail.Body = textBoxBody.Text;
                    Attachment attachment;
                    attachment = new Attachment(textBox1.Text);
                    mail.Attachments.Add(attachment);
                    SmtpServer.Port = 587;
                    SmtpServer.Credentials = new System.Net.NetworkCredential(textBoxfrom.Text, textBoxpass.Text);
                    SmtpServer.EnableSsl = true;
                    SmtpServer.Send(mail);
                    MessageBox.Show("Mail Send", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    textBoxfrom.Enabled = false;
                    textBoxpass.Enabled = false;
                    textBoxto.Text = "";
                    textBoxsub.Text = "";
                    textBoxBody.Text = "";
                    textBox1.Text = "";
                    CU.Visible = true;
                }
            }

            catch (Exception)
            {
                MessageBox.Show("Silahkan Periksa Email atau Password Anda", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }

Dan ini kodingan keseluruhannya jika digabung

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net.Mail;

namespace smtp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            DialogResult result = openFileDialog1.ShowDialog();
            if (result == DialogResult.OK)
            {
                string file = openFileDialog1.FileName;
                textBox1.Text = file;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                if (textBoxto.Text == "" || textBoxsub.Text == "" || textBoxBody.Text == "")
                {
                    MessageBox.Show("Periksa Kolom Dengan Benar", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }

                else if (textBox1.Text == "")
                {
                    MailMessage mail = new MailMessage();
                    SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
                    mail.From = new MailAddress(textBoxfrom.Text);
                    mail.To.Add(textBoxto.Text);
                    mail.Subject = textBoxsub.Text;
                    mail.Body = textBoxBody.Text;
                    SmtpServer.Port = 587;
                    SmtpServer.Credentials = new System.Net.NetworkCredential(textBoxfrom.Text, textBoxpass.Text);
                    SmtpServer.EnableSsl = true;
                    SmtpServer.Send(mail);
                    MessageBox.Show("Mail Send", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    textBoxfrom.Enabled = false;
                    textBoxpass.Enabled = false;
                    textBoxto.Text = "";
                    textBoxsub.Text = "";
                    textBoxBody.Text = "";
                    CU.Visible = true;
                }

                else
                {
                    MailMessage mail = new MailMessage();
                    SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
                    mail.From = new MailAddress(textBoxfrom.Text);
                    mail.To.Add(textBoxto.Text);
                    mail.Subject = textBoxsub.Text;
                    mail.Body = textBoxBody.Text;
                    Attachment attachment;
                    attachment = new Attachment(textBox1.Text);
                    mail.Attachments.Add(attachment);
                    SmtpServer.Port = 587;
                    SmtpServer.Credentials = new System.Net.NetworkCredential(textBoxfrom.Text, textBoxpass.Text);
                    SmtpServer.EnableSsl = true;
                    SmtpServer.Send(mail);
                    MessageBox.Show("Mail Send", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    textBoxfrom.Enabled = false;
                    textBoxpass.Enabled = false;
                    textBoxto.Text = "";
                    textBoxsub.Text = "";
                    textBoxBody.Text = "";
                    textBox1.Text = "";
                    CU.Visible = true;
                }
            }

            catch (Exception)
            {
                MessageBox.Show("Silahkan Periksa Email atau Password Anda", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
        }

        private void CU_Click(object sender, EventArgs e)
        {
            textBoxfrom.Enabled = true;
            textBoxpass.Enabled = true;
            textBoxfrom.Text = "";
            textBoxpass.Text = "";
            CU.Visible = false;
        }
    }
} 

Ini merupakan screenshot ketika program dijalankan

Spoiler:

Semoga Bermnafaat :)