asp.net C#用文字檔做資料庫的例子

1.資料集基類

 

代碼如下

複製代碼

/// <summary> /// 資料集基類 /// </summary> /// <typeparam name="T"></typeparam> public abstract class BaseTB<T>     where T : class {     private static string _TextFile = Path.Combine(ConfigurationManager.AppSettings["TextDBDir"], typeof(T).Name + "TB.txt");     private static List<T> _data = null;     /// <summary>     /// 資料容器     /// </summary>     internal static List<T> Container     {         get         {             if (_data == null)             {                 if (File.Exists(_TextFile))                 {                     _data = JsonHelper.Deserialize<List<T>>(File.ReadAllText(_TextFile));                 }                 else                 {                     _data = new List<T>();                 }             }             return _data;         }     }     /// <summary>     /// 擷取記錄     /// </summary>     /// <param name="obj"></param>     /// <returns></returns>     public abstract T Get(T obj);     /// <summary>     /// 屬性複製     /// </summary>     /// <param name="obj1"></param>     /// <param name="obj2"></param>     public abstract void Copy(T obj1, T obj2);     /// <summary>     /// 添加記錄     /// </summary>     /// <param name="obj"></param>     /// <returns></returns>     public bool Add(T obj)     {         bool result = false;         T item = Get(obj);         if (item == null)         {             Container.Add(obj);             Save();             result = true;         }         return result;     }     /// <summary>     /// 更新記錄     /// </summary>     /// <param name="obj"></param>     /// <returns></returns>     public bool Update(T obj)     {         bool result = false;         T item = Get(obj);         if (item != null)         {             Copy(item, obj);             Save();             result = true;         }         return result;     }     /// <summary>     /// 刪除記錄     /// </summary>     /// <param name="obj"></param>     /// <returns></returns>     public bool Remove(T obj)     {         bool result = false;         T item = Get(obj);         if (item != null)         {             Container.Remove(item);             Save();             result = true;         }         return result;     }     /// <summary>     /// 儲存資料     /// </summary>     internal void Save()     {         File.WriteAllText(_TextFile, JsonHelper.Serialize(Container));     } }

2.實體及資料集類

 

代碼如下

複製代碼

/// <summary> /// 實體類 /// </summary> public class User {     public string Usn { get; set; }     public string Pwd { get; set; } } /// <summary> /// 資料集 /// </summary> public class UserTB : BaseTB<User> {           #region 實現父類方法     /// <summary>     /// 擷取對象     /// </summary>     /// <param name="user"></param>     /// <returns></returns>     public override User Get(User user)     {         return Get(user.Usn);     }     /// <summary>     /// 屬性複製     /// </summary>     /// <param name="user1"></param>     /// <param name="user2"></param>     public override void Copy(User user1, User user2)     {         user1.Usn = user2.Usn;         user1.Pwd = user2.Pwd;     }     #endregion     /// <summary>     /// 擷取對象     /// </summary>     /// <param name="usn"></param>     /// <returns></returns>     public User Get(string usn)     {         User result = null;         foreach (User item in Container)         {             if (item.Usn.ToLower() == usn.ToLower())             {                 result = item;                 break;             }         }         return result;     }     /// <summary>     /// 刪除記錄     /// </summary>     /// <param name="usn"></param>     public void Remove(string usn)     {         User user = new User() { Usn = usn };         Remove(user);     } }

3.資料庫類

 

代碼如下

複製代碼

/// <summary> /// 資料庫 /// </summary> public static class Database {     /// <summary>     /// 初始化     /// </summary>     static Database()     {         if (!Directory.Exists(ConfigurationManager.AppSettings["TextDBDir"]))         {             Directory.CreateDirectory(ConfigurationManager.AppSettings["TextDBDir"]);         }     }     private static UserTB _usertb;     /// <summary>     ///     /// </summary>     public static UserTB UserTB     {         get         {             if (_usertb == null)             {                 _usertb = new UserTB();             }             return _usertb;         }     } }

調用樣本

 

代碼如下	複製代碼
User user = new User() { Usn = "dnawo", Pwd = "666666" }; Database.UserTB.Add(user); user.Pwd = "999999"; Database.UserTB.Update(user);

這樣在txt檔案中是儲存按行以tab分開的資料存放區格式了，所以這樣也方便它來尋找資料了哦。