private void button2_Click(object sender, EventArgs e) { fTrangChu m = new fTrangChu(); this.Hide(); m.ShowDialog(); this.Show(); }
private void btnLogin_Click(object sender, EventArgs e) { SqlConnection connectionSTR = new SqlConnection(@"Data Source=ADMIN-PC\SQLEXPRESS;Initial Catalog=GymSystem;Integrated Security=True"); try { connectionSTR.Open(); string UserName = txtTK.Text; string PassWord = txtMK.Text; string query = "SELECT * FROM dbo.TaiKhoan WHERE UserName = '******'AND PassWord = '******'"; SqlCommand cmd = new SqlCommand(query, connectionSTR); DataTable dt = new DataTable(); // tao 1 kho ao de luu tru du lieu SqlDataAdapter adapter = new SqlDataAdapter(cmd); // chuyen du lieu ve adapter.Fill(dt); // do du lieu vao kho SqlDataReader data = cmd.ExecuteReader(); if (data.Read() == true) { fTrangChu f = new fTrangChu(dt.Rows[0][0].ToString(), dt.Rows[0][1].ToString(), dt.Rows[0][2].ToString()); // fMain f = new fMain(); this.Hide(); f.ShowDialog(); this.Show(); } else { MessageBox.Show("Sai tài khoản hoặc mật khẩu! Vui lòng nhập lại!"); } } catch (Exception ex) { MessageBox.Show("Lỗi kết nối!"); } }