private void btn_add_Click(object sender, EventArgs e)
{
string maGV = cb_maGV.Text;
string tenGV = tb_tengv.Text;
string tenDN = tb_tenDN.Text;
string mk = tb_mk.Text;
if (tenDN == "" || mk == "")
{
MessageBox.Show("Tên đăng nhập hoặc mật khẩu không được để trống!!!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.None);
}
else
{
Connect_DB.openConn();
string lenh = @"insert into taikhoan(magiaovien,matkhau,tentaikhoan)
values (" + maGV + ",N'" + mk + "','" + tenDN + "')";
SqlCommand cmd = new SqlCommand(lenh, Connect_DB.conn);
cmd.CommandType = CommandType.Text;
int a = cmd.ExecuteNonQuery();
if (a > 0)
{
MessageBox.Show("Thêm thành công!!!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.None);
}
QuanLyTaiKhoan_Load(sender, e);
Connect_DB.closeConn();
}
}
private void btn_tao_Click(object sender, EventArgs e)
{
string name = txt_tenhs.Text;
string gioitinh = cb_gioitinh.Text;
string diachi = txt_diachi.Text;
string lop = txt_lop.Text;
string email = txt_email.Text;
string sdt = txt_sdt.Text;
string hokhau = txt_hokhau.Text;
string matruong = cb_matruong.Text;
string ngaysinh = dtp_ngaysinh.Value.ToString("MM/dd/yyyy");
Connect_DB.openConn();
string lenh = @" insert into hocsinh(hoten, gioitinh, diachi, lop, email, sdt, hokhau, matruong, ngaysinh)
values(N'" + name + "', N'" + gioitinh + "', '" + diachi + "', N'" + lop + "', N'" + email + "', N'" + sdt + "', N'" + hokhau + "', " + matruong + ", '" + ngaysinh + "')";
SqlCommand cmd = new SqlCommand(lenh, Connect_DB.conn);
cmd.CommandType = CommandType.Text;
int a = cmd.ExecuteNonQuery();
if (a > 0)
{
MessageBox.Show("Thêm thành công!!!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.None);
}
Connect_DB.closeConn();
}
private void QuanLyTaiKhoan_Load(object sender, EventArgs e)
{
Connect_DB.openConn();
string query = "select giaovien.magiaovien , hoten, mataikhoan, tentaikhoan,matkhau from taikhoan inner join giaovien on taikhoan.magiaovien = giaovien.magiaovien; ";
SqlCommand cmd = new SqlCommand(query, Connect_DB.connect());
cmd.CommandType = CommandType.Text;
SqlDataAdapter adt = new SqlDataAdapter(cmd);
DataTable dtb = new DataTable();
adt.Fill(dtb);
dgv_taikhoan.DataSource = dtb;
// Select mã giáo viên cho combobox
string queryMGV = "Select * from giaovien";
SqlCommand cmd2 = new SqlCommand(queryMGV, Connect_DB.conn);
SqlDataAdapter da = new SqlDataAdapter(cmd2);
DataSet ds = new DataSet();
da.Fill(ds);
cb_maGV.DataSource = ds.Tables[0];
cb_maGV.ValueMember = "magiaovien";
cb_maGV.DisplayMember = "magiaovien";
cb_maGV.Enabled = true;
Connect_DB.closeConn();
}
private void btn_delete_Click(object sender, EventArgs e)
{
string maTk = tb_matk.Text.ToString();
if (maTk == null || maTk == "")
{
MessageBox.Show("Bạn phải chọn tài khoản để xóa!!!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.None);
}
else
{
Connect_DB.openConn();
string lenh = @"delete taikhoan where mataikhoan =" + maTk;
SqlCommand cmd = new SqlCommand(lenh, Connect_DB.conn);
cmd.CommandType = CommandType.Text;
int a = cmd.ExecuteNonQuery();
if (a > 0)
{
MessageBox.Show("Xóa thành công!!!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.None);
}
QuanLyTaiKhoan_Load(sender, e);
tb_matk.Text = null;
tb_tenDN.Text = null;
tb_mk.Text = null;
Connect_DB.closeConn();
}
}
private void button1_Click(object sender, EventArgs e)
{
String tendn = txtTenDN.Text;
String mk = txtMK.Text;
SqlConnection conn = Connect_DB.connect();
conn.Open();
string queryString = "SELECT * FROM taikhoan where tentaikhoan = @tentaikhoan and matkhau = @matkhau;";
SqlCommand command = new SqlCommand(queryString, conn);
command.Parameters.Add("@tentaikhoan", SqlDbType.NVarChar, 50).Value = tendn;
command.Parameters.Add("@matkhau", SqlDbType.NVarChar, 255).Value = Hash(mk);
using (SqlDataReader reader = command.ExecuteReader())
{
if (reader.HasRows)
{
reader.Close();
conn.Close();
this.Hide();
TrangChu tc = new TrangChu();
tc.Show();
}
else
{
reader.Close();
conn.Close();
MessageBox.Show("Tên đăng nhập hoặc mật khẩu k đúng");
}
}
}
private void tab_QLHS_Click(object sender, EventArgs e)
{
Connect_DB.openConn();
SqlCommand cmd = new SqlCommand("Select * from hocsinh", Connect_DB.connect());
cmd.CommandType = CommandType.Text;
SqlDataAdapter adt = new SqlDataAdapter(cmd);
DataTable dtb = new DataTable();
DataTable dtb2 = new DataTable();
adt.Fill(dtb);
adt.Fill(dtb2);
dgv_Capnhat.DataSource = dtb;
dgv_XoaHS.DataSource = dtb2;
Connect_DB.closeConn();
}
private void cb_maGV_SelectionChangeCommitted(object sender, EventArgs e)
{
Connect_DB.openConn();
String maGV = cb_maGV.Text.ToString();
if (maGV != null || maGV != "")
{
string queryMGV = @"select * from giaovien where magiaovien=" + maGV;
SqlCommand cmd2 = new SqlCommand(queryMGV, Connect_DB.conn);
SqlDataAdapter da = new SqlDataAdapter(cmd2);
DataSet ds = new DataSet();
da.Fill(ds);
string tenGV = ds.Tables[0].Rows[0].Field <string>(1);
tb_tengv.Text = tenGV;
Connect_DB.closeConn();
}
}
private void QuanLyHocSinh_Load(object sender, EventArgs e)
{
// Fill data to combobox mã trường
Connect_DB.openConn();
string query = "Select * from truongthcs";
SqlCommand cmd = new SqlCommand(query, Connect_DB.conn);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
cb_matruong.DataSource = ds.Tables[0];
cb_matruong.ValueMember = "matruong";
cb_matruong.DisplayMember = "matruong";
cb_matruong.Enabled = true;
cb_gioitinh.Items.Add("Nam");
cb_gioitinh.Items.Add("Nữ");
}
private void btn_hoanthanh_Click(object sender, EventArgs e)
{
DialogResult dl = MessageBox.Show("Bạn có chắc muốn thay đổi", "Notification", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (dl == DialogResult.Yes)
{
string ngaysinh = dtp_ngaysinh.Value.ToString("MM/dd/yyyy");
string query = @"update hocsinh set hoten = N'" + txt_hoten.Text + "' , gioitinh=N'" + cb_gioitinh.Text + "', diachi=N'" + txt_diachi.Text + "', lop = N'" + txt_lop.Text + "', email=N'" + txt_email.Text + "' , sdt=N'" + txt_sdt.Text + "',hokhau=N'" + txt_hokhau.Text + "',matruong = " + txt_matruong.Text + ", ngaysinh='" + ngaysinh + "'" +
"where mahocsinh =" + txt_mahs.Text;
Connect_DB.openConn();
SqlCommand cmd = new SqlCommand(query, Connect_DB.conn);
cmd.CommandType = CommandType.Text;
int a = cmd.ExecuteNonQuery();
Connect_DB.closeConn();
if (a > 0)
{
MessageBox.Show("Sửa thành công!!!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.None);
this.Close();
}
}
}
private void btn_update_Click(object sender, EventArgs e)
{
string maTk = tb_matk.Text;
string tenDN = tb_tenDN.Text;
string mk = tb_mk.Text;
Connect_DB.openConn();
string lenh = @"update taikhoan set tentaikhoan = N'" + tenDN + "' , matkhau=N'" + mk + "' where mataikhoan = " + maTk;
SqlCommand cmd = new SqlCommand(lenh, Connect_DB.conn);
cmd.CommandType = CommandType.Text;
int a = cmd.ExecuteNonQuery();
if (a > 0)
{
MessageBox.Show("Cập nhật thành công!!!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.None);
}
QuanLyTaiKhoan_Load(sender, e);
tb_matk.Text = null;
tb_tenDN.Text = null;
tb_mk.Text = null;
Connect_DB.closeConn();
}
private void dgv_XoaHS_CellClick(object sender, DataGridViewCellEventArgs e)
{
DataGridViewRow row = new DataGridViewRow();
if (e.ColumnIndex == 0)
{
DialogResult dl = MessageBox.Show("Bạn có chắc muốn xóa", "Notification", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (dl == DialogResult.Yes)
{
row = dgv_XoaHS.Rows[e.RowIndex];
string query = @"delete hocsinh where mahocsinh =" + row.Cells[1].Value.ToString();
Connect_DB.openConn();
SqlCommand cmd = new SqlCommand(query, Connect_DB.conn);
cmd.CommandType = CommandType.Text;
int a = cmd.ExecuteNonQuery();
Connect_DB.closeConn();
if (a > 0)
{
MessageBox.Show("Xóa thành công!!!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.None);
dgv_XoaHS.Rows.Remove(row);
}
}
}
}
