private void signup_Click(object sender, EventArgs e) { Signup su = new Signup(); su.Show(); this.Hide(); }
private void login_Click(object sender, EventArgs e) { // sqlcon.Open(); string student = studentid.Text; DataTable dt = new DataTable(); SqlCommand cmd = new SqlCommand("Select * from Student where StudentID = @StudentID", sqlcon); cmd.Parameters.Add("@StudentID", SqlDbType.VarChar).Value = student; SqlDataAdapter sda = new SqlDataAdapter(cmd); sda.SelectCommand = cmd; sda.Fill(dt); if (studentid.Text == "admin" || studentid.Text == "ADMIN" || dt.Rows.Count > 0) { SetValueForText1 = studentid.Text; //sqlcon.Close(); MessageBox.Show("Successfully Login!"); Library lib = new Library(); lib.Show(); this.Hide(); } else { MessageBox.Show("Wrong or Not Registered!"); DialogResult dialogResult = MessageBox.Show("Do you want to Register?", "ATTENTION!", MessageBoxButtons.YesNo); if (dialogResult == DialogResult.Yes) { Signup su = new Signup(); su.Show(); this.Hide(); } } }