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Login in C# using mysql


Below is the c# project which shows how to implement login functionlity using mysql database as backend.

Design view of the project:

Login Screen


Source of the project:

using System.Windows.Forms;
using MySql.Data.MySqlClient;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        MySqlConnection con = new MySqlConnection("server=localhost;uid=root;pwd=root;database=test");
        MySqlCommand cmd;

        MySqlDataReader dr;
         
     
        public Form1()
        {
            InitializeComponent();
            cmd = new MySqlCommand();
            cmd.Connection = con;
            try
            {
                con.Open();
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("db connection error");
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {

                cmd.CommandText = "GetDept";
                cmd.CommandType = CommandType.StoredProcedure;

                DataTable dt = new DataTable();
                MySqlDataAdapter adp = new MySqlDataAdapter(cmd);
                adp.Fill(dt);

                MessageBox.Show(dt.Rows.Count.ToString());
                dataGridView1.DataSource = dt;
                return;

                //cmd.CommandText = "create procedure GetDept() Begin select * from dept; End;";
                //cmd.ExecuteNonQuery();
                //return;

                String str = "select pwd from login where uname='" + textBox1.Text + "'";
                cmd.CommandText = str;

                if (dr != null)
                    dr.Close();
                dr = cmd.ExecuteReader();
                if (dr.Read())
                {
                    String p = dr.GetString(0);
                    if (textBox2.Text == p)
                        MessageBox.Show("Successful.....");
                    else
                        MessageBox.Show("Something went wrong....");
                }
                else
                {
                    MessageBox.Show("Error....");

                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error is " + ex.Message);
            }

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }
    }
}

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