private void button3_Click(object sender, EventArgs e)
        {
            this.Hide();
            Choice_Operation cs = new Choice_Operation();

            cs.Show();
        }
Beispiel #2
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        private void button1_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(textBox1.Text))
            {
                textBox1.Focus();
                errorProvider1.SetError(textBox1, "Please Enter User Name");
            }
            if (string.IsNullOrEmpty(textBox2.Text))
            {
                textBox2.Focus();
                errorProvider1.SetError(textBox2, "Please Enter User Name");
            }



            SqlConnection  conn = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\AISH GUPTA\Documents\placementdb.mdf;Integrated Security=True;Connect Timeout=30");
            SqlDataAdapter sda  = new SqlDataAdapter("select count(*) from Login where username ='******' and password='******'", conn);
            DataTable      dt   = new DataTable();

            sda.Fill(dt);
            if (dt.Rows[0][0].ToString() == "1")
            {
                this.Hide();
                Choice_Operation co = new Choice_Operation();
                co.Show();
            }
            else
            {
                MessageBox.Show("Please enter correct Username and Password", "alert", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }