/// <summary>
/// 根据参数userId，获取购物篮详细信息
/// </summary>
/// <param name="userId">用户ID</param>
public void LoadData(int userId)
{
Database db = new Database(); //实例化一个Database类
string sql = "";
sql = "Select * from [Cart] where UserID = " + userId;
SqlDataReader reader = db.GetDataReader(sql); //利用Database类的GetDataRow方法查询用户数据
//根据查询得到的数据，对成员安全赋值
while (reader.Read())
{
if (this._cartId == 0)
{
this._cartId = GetSafeData.ValidateDataReader_N(reader, "CartId");
this._userId = GetSafeData.ValidateDataReader_N(reader, "UserId");
}
this._books.Add(GetSafeData.ValidateDataReader_N(reader, "BookId"));
this._amount.Add(GetSafeData.ValidateDataReader_N(reader, "Amount"));
this._exist = true;
}
if (this._cartId == 0)
{
this._exist = false;
}
}