private void button4_Click(object sender, EventArgs e)
        {
            Login_Admin la = new Login_Admin();

            la.Show();
            this.Hide();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            this.Close();
            Login_Admin lg = new Login_Admin();

            lg.Show();
        }
        private void pictureBox5_Click(object sender, EventArgs e)
        {
            try
            {
                if (textBox1.Text == "" || textBox2.Text == "" || (textBox1.Text == "" && textBox2.Text == ""))
                {
                    MessageBox.Show("Please enter the correct Username and Password!!", "Warning");
                }
                else
                {
                    /*  StringBuilder hash = new StringBuilder();
                     * MD5CryptoServiceProvider md5provider = new MD5CryptoServiceProvider();
                     * byte[] bytes = md5provider.ComputeHash(new UTF8Encoding().GetBytes(textBox2.Text));
                     *
                     * for (int i = 0; i < bytes.Length; i++)
                     * {
                     *    hash.Append(bytes[i].ToString("x2"));
                     * }*/
                    con.Open();
                    sda = new SqlDataAdapter("select * from detailsAdmin where username='******' and password='******'", con);
                    sda.SelectCommand.ExecuteNonQuery();
                    data = new System.Data.DataTable();
                    sda.Fill(data);
                    con.Close();


                    if (data.Rows.Count == 1)
                    {
                        MessageBox.Show("Successfully Login as Admin!!");
                        this.Hide();
                        Login_Admin lg = new Login_Admin();
                        lg.Show();
                    }

                    else
                    {
                        con.Open();
                        sda = new SqlDataAdapter("select * from details where role='" + textBox1.Text + "' and password='******'", con);
                        sda.SelectCommand.ExecuteNonQuery();
                        data = new System.Data.DataTable();
                        sda.Fill(data);
                        con.Close();

                        if (data.Rows.Count == 1)
                        {
                            MessageBox.Show("Successfully Login as User!!");

                            this.Hide();
                            Login_User lu = new Login_User();
                            lu.Show();

                            SqlCommand cmd = new SqlCommand("Select Count(*) from details_M where quantity<=50", con2);
                            sda2 = new SqlDataAdapter();
                            sda2.SelectCommand = cmd;
                            DataTable data2 = new DataTable();

                            sda2.Fill(data2);
                            if (data2.Rows[0][0].ToString() == "1")
                            {
                                MessageBox.Show("Some of your stocks are less than 50 quantity item so check it and refill it..!!");
                            }
                        }

                        else
                        {
                            MessageBox.Show("Please enter correct Username and Password..!! ");
                            textBox1.Text = "";
                            textBox2.Text = "";
                        }
                    }
                }
            }


            catch (Exception ex1)
            {
                MessageBox.Show("Sorry there are some went to wrong, Please try again..!!");
            }
        }