private void btn_save_Click(object sender, EventArgs e)
{
try
{
if (string.IsNullOrWhiteSpace(tb_ten.Text))
{
throw new Exception();
}
if (kh == null)
{
kh = new Khoahoc(tb_ten.Text, int.Parse(tb_max.Text), DateTime.Parse(tb_dangky.Text), DateTime.Parse(tb_hoc.Text));
sql.InsertKhoahoc(kh);
}
else
{
kh.ten = tb_ten.Text;
kh.max_danhsach = int.Parse(tb_max.Text);
kh.batdau_dangky = DateTime.Parse(tb_dangky.Text);
kh.batdau_hoc = DateTime.Parse(tb_hoc.Text);
sql.UpdateKhoahoc(kh);
}
gui.updatebroad("Khoahoc");
this.Dispose();
}
catch (Exception ex)
{
l_error.Text = "Error";
Console.WriteLine(ex.Message);
}
}
public List<Khoahoc> SearchKhoahoc(string str)
{
string query;
if (string.IsNullOrWhiteSpace(str))
{
query = "SELECT * from khoahoc";
}
else
{
query = "Select * from khoahoc WHERE ten like '%"+ str +"%' OR trang_thai like '%" + str + "%' OR batdau_dangki like '%" + str + "%' OR batdau_hoc like '%" + str + "%'";
}
List<Khoahoc> khsearch_list = new List<Khoahoc>();
//Open connection
if (this.OpenConnection() == true)
{
//Create Command
MySqlCommand cmd = new MySqlCommand(query, connection);
//Create a data reader and Execute the command
MySqlDataReader dataReader = cmd.ExecuteReader();
while (dataReader.Read())
{
Khoahoc kh = new Khoahoc(int.Parse(dataReader["id"] + ""), dataReader["ten"] + "", idstringtosvlist(dataReader["danh_sach"] + ""), dataReader["trang_thai"] + "", int.Parse(dataReader["max_danhsach"] + ""), DateTime.Parse(dataReader["batdau_dangki"] + ""), DateTime.Parse(dataReader["batdau_hoc"] + ""));
khsearch_list.Add(kh);
}
//close connection
CloseConnection();
}
return khsearch_list;
}
public KhoahocGUI(GUI gui, Khoahoc kh)
{
this.gui = gui;
this.kh = kh;
InitializeComponent();
tb_ten.Text = kh.ten;
tb_max.Text = kh.max_danhsach.ToString();
tb_dangky.Text = kh.batdau_dangky.ToString("MM/dd/yyyy");
tb_hoc.Text = kh.batdau_hoc.ToString("MM/dd/yyyy");
}
public void UpdateKhoahoc(Khoahoc kh)
{
string query = "UPDATE khoahoc SET ten = '" + kh.ten + "', trang_thai = '" + kh.trang_thai + "', max_danhsach = '" + kh.max_danhsach +"', danh_sach = '"+ svlisttoidstring(kh.danh_sach) + "', batdau_dangki = '" + kh.batdau_dangky.ToString("MM/dd/yyyy") + "', batdau_hoc = '" + kh.batdau_hoc.ToString("MM/dd/yyyy") + "' WHERE id = '" + kh.id + "';";
//open connection
if (this.OpenConnection() == true)
{
//create command and assign the query and connection from the constructor
MySqlCommand cmd = new MySqlCommand(query, connection);
//Execute command
cmd.ExecuteNonQuery();
//close connection
CloseConnection();
update();
}
}
public void InsertKhoahoc(Khoahoc kh)
{
string query = "INSERT INTO khoahoc (ten, trang_thai, max_danhsach, batdau_dangki, batdau_hoc) VALUES('"
+ kh.ten + "','" + kh.trang_thai + "','" + kh.max_danhsach + "','" + kh.batdau_dangky.ToString("MM/dd/yyyy") + "','" + kh.batdau_hoc.ToString("MM/dd/yyyy") + "')";
//open connection
if (this.OpenConnection() == true)
{
//create command and assign the query and connection from the constructor
MySqlCommand cmd = new MySqlCommand(query, connection);
//Execute command
cmd.ExecuteNonQuery();
//close connection
CloseConnection();
update();
}
}
public void DeleteKhoahoc(Khoahoc kh)
{
string query = "DELETE FROM khoahoc WHERE id='" + kh.id.ToString() + "'";
if (this.OpenConnection() == true)
{
try
{
MySqlCommand cmd = new MySqlCommand(query, connection);
cmd.ExecuteNonQuery();
}
catch (MySqlException ex)
{
}
finally
{
CloseConnection();
update();
}
}
}
