利用C#开发酒店管理系统的项目经验总结

//新建客户信息
public void Add(Customer customer)
{
    string sql = "insert into tb_customer(cname,sex,phone,idcard)"
                    + "values(@name,@sex,@phone,@idcard)";
    SQLiteParameter[] parameters =
    {
        new SQLiteParameter("@name",customer.CName),
        new SQLiteParameter("@sex",customer.CSex),
        new SQLiteParameter("@phone",customer.CPhone),
        new SQLiteParameter("@idcard",customer.CIDCard)
    };
    int result = SqliteHelper.ExecuteNonQuery(sql, parameters);
}

//更新客户信息
public void Update(Customer customer)
{
    string sql = "Update tb_customer set cname=@name,sex=@sex,"
                    + "phone=@phone,idcard=@idcard where id=@id";
    SQLiteParameter[] parameters =
    {
        new SQLiteParameter("@name",customer.CName),
        new SQLiteParameter("@sex",customer.CSex),
        new SQLiteParameter("@phone",customer.CPhone),
        new SQLiteParameter("@idcard",customer.CIDCard),
        new SQLiteParameter("@id",customer.ID)
    };
    int result = SqliteHelper.ExecuteNonQuery(sql, parameters);
}

//查询客户信息
public List<Customer> GetAllCustomers()
{
    List<Customer> results = new List<Customer>();
    string sql = "select * from tb_customer";
    DataTable table = SqliteHelper.ExecuteQuery(sql, null);
    if (table.Rows.Count > 0)
    {
        foreach (DataRow row in table.Rows)
        {
            Customer customer = new Customer();
            customer.ID = int.Parse(row["id"].ToString());
            customer.CName = row["cname"].ToString();
            customer.CSex = row["sex"].ToString();
            customer.CPhone = row["phone"].ToString();
            customer.CIDCard = row["idcard"].ToString();
            results.Add(customer);
        }
    }
    return results;
}

//新建房间信息
public void Add(Room room)
{
    string sql = "insert into tb_room(rname,type,price,isclean,remark)"
                    + "values(@name,@type,@price,@isclean,@remark)";
    SQLiteParameter[] parameters =
    {
        new SQLiteParameter("@name",room.RName),
        new SQLiteParameter("@type",room.RType),
        new SQLiteParameter("@price",room.RPrice),
        new SQLiteParameter("@isclean",room.RIsClean),
        new SQLiteParameter("@remark",room.RRemark)
    };
    int result = SqliteHelper.ExecuteNonQuery(sql, parameters);
}

//更新房间信息
public void Update(Room room)
{
    string sql = "Update tb_customer set rname=@name,type=@type,"
                    + "price=@price where id=@id";
    SQLiteParameter[] parameters =
    {
        new SQLiteParameter("@name",room.RName),
        new SQLiteParameter("@type",room.RType),
        new SQLiteParameter("@price",room.RPrice),
        new SQLiteParameter("@id",room.ID)
    };
    int result = SqliteHelper.ExecuteNonQuery(sql, parameters);
}

//查询房间信息
public List<Room> GetAllRooms()
{
    List<Room> results = new List<Room>();
    string sql = "select * from tb_room";
    DataTable table = SqliteHelper.ExecuteQuery(sql, null);
    if (table.Rows.Count > 0)
    {
        foreach (DataRow row in table.Rows)
        {
            Room room = new Room();
            room.ID = int.Parse(row["id"].ToString());
            room.RName = row["rname"].ToString();
            room.RType = row["type"].ToString();
            room.RPrice = double.Parse(row["price"].ToString());
            room.RIsClean = bool.Parse(row["isclean"].ToString());
            room.RRemark = row["remark"].ToString();
            results.Add(room);
        }
    }
    return results;
}

//新建商品信息
public void Add(Goods goods)
{
    string sql = "insert into tb_goods(gname,price,counts)"
                    + "values(@name,@price,@counts)";
    SQLiteParameter[] parameters =
    {
        new SQLiteParameter("@name",goods.GName),
        new SQLiteParameter("@price",goods.GPrice),
        new SQLiteParameter("@counts",goods.GCounts)
    };
    int result = SqliteHelper.ExecuteNonQuery(sql, parameters);
}

//更新商品信息
public void Update(Goods goods)
{
    string sql = "Update tb_goods set gname=@name,price=@price,"
                    + "counts=@counts where id=@id";
    SQLiteParameter[] parameters =
    {
        new SQLiteParameter("@name",goods.GName),
        new SQLiteParameter("@price",goods.GPrice),
        new SQLiteParameter("@counts",goods.GCounts),
        new SQLiteParameter("@id",goods.ID)
    };
    int result = SqliteHelper.ExecuteNonQuery(sql, parameters);
}

//查询商品信息
public List<Goods> GetAllGoods()
{
    List<Goods> results = new List<Goods>();
    string sql = "select * from tb_goods";
    DataTable table = SqliteHelper.ExecuteQuery(sql, null);
    if (table.Rows.Count > 0)
    {
        foreach (DataRow row in table.Rows)
        {
            Goods goods = new Goods();
            goods.ID = int.Parse(row["id"].ToString());
            goods.GName = row["gname"].ToString();
            goods.GPrice = double.Parse(row["price"].ToString());
            goods.GCounts = int.Parse(row["counts"].ToString());
            results.Add(goods);
        }
    }
    return results;
}

//员工结算工资
public void CalculateSalary(Employee employee)
{
    string sql = "insert into tb_salary(name,position,salary,date)"
                    + "values(@name,@position,@salary,@date)";
    SQLiteParameter[] parameters =
    {
        new SQLiteParameter("@name",employee.EName),
        new SQLiteParameter("@position",employee.EPosition),
        new SQLiteParameter("@salary",employee.CalculateSalary()),
        new SQLiteParameter("@date",DateTime.Now.ToShortDateString())
    };
    int result = SqliteHelper.ExecuteNonQuery(sql, parameters);
}

//更新员工信息
public void Update(Employee employee)
{
    string sql = "Update tb_employee set ename=@name,sex=@sex,"
                    + "position=@position,salary=@salary where id=@id";
    SQLiteParameter[] parameters =
    {
        new SQLiteParameter("@name",employee.EName),
        new SQLiteParameter("@sex",employee.ESex),
        new SQLiteParameter("@position",employee.EPosition),
        new SQLiteParameter("@salary",employee.ESalary),
        new SQLiteParameter("@id",employee.ID)
    };
    int result = SqliteHelper.ExecuteNonQuery(sql, parameters);
}

//查询员工信息
public List<Employee> GetAllEmployees()
{
    List<Employee> results = new List<Employee>();
    string sql = "select * from tb_employee";
    DataTable table = SqliteHelper.ExecuteQuery(sql, null);
    if (table.Rows.Count > 0)
    {
        foreach (DataRow row in table.Rows)
        {
            Employee employee = new Employee();
            employee.ID = int.Parse(row["id"].ToString());
            employee.EName = row["ename"].ToString();
            employee.ESex = row["sex"].ToString();
            employee.EPosition = row["position"].ToString();
            employee.ESalary = double.Parse(row["salary"].ToString());
            results.Add(employee);
        }
    }
    return results;
}

//生成财务报表
public List<Finance> GetFinance(string start, string end)
{
    List<Finance> results = new List<Finance>();
    string sql = "select * from tb_finance where date between @start and @end";
    SQLiteParameter[] parameters =
    {
        new SQLiteParameter("@start",start),
        new SQLiteParameter("@end",end)
    };
    DataTable table = SqliteHelper.ExecuteQuery(sql, parameters);
    if (table.Rows.Count > 0)
    {
        foreach (DataRow row in table.Rows)
        {
            Finance finance = new Finance();
            finance.ID = int.Parse(row["id"].ToString());
            finance.FType = row["type"].ToString();
            finance.FMoney = double.Parse(row["money"].ToString());
            finance.FDate = row["date"].ToString();
            results.Add(finance);
        }
    }
    return results;
}