//存储SQL连接配置的接口
public interface IWriteSQLConfigValue
{
   /// <summary>
   /// 写入SQL的连接配置信息
   /// </summary>
   void Write();
   
   /// <summary>
   /// 读取SQL的连接配置信息
   /// </summary>
   void Read();
   
   /// <summary>
   /// SQL Server Name/IP
   /// </summary>
   string ServerName { get; set; }
   
   /// <summary>
   /// 连接的数据库
   /// </summary>
   string InitialCatalog { get; set; }
   
   /// <summary>
   /// 用户名
   /// </summary>
   string UserName { get; set; }
   
   /// <summary>
   /// 密码
   /// </summary>
   string Password { get; set; }
   
   /// <summary>
   /// 生成连接字符串
   /// </summary>
   /// <returns></returns>
   string BuildConnectionString();
}


// 来源:www.CSFramework.com, C/S结构框架学习网

//连接参数保存在INI文件
public class IniFileWriter : IWriteSQLConfigValue
{
   #region IWriteConfigValue Members
   
   private string _iniFile;
   private string _ServerName;
   private string _Password;
   private string _UserName;
   private string _InitialCatalog;
   
   public IniFileWriter(string iniFile)
   {
      _iniFile = iniFile;
      if (!System.IO.File.Exists(iniFile))
      Write();
      
      Read();
   }
   
   public string BuildConnectionString()
   {
      return new SqlConfiguration().GetConnectionString(this);
   }
   
   public void Read()
   {
      IniFile cfg = new IniFile(_iniFile);
      if (cfg != null)
      {
         _ServerName = cfg.IniReadValue("SQL Configuration", "SqlServer");
         _InitialCatalog = cfg.IniReadValue("SQL Configuration", "database");
         _UserName = cfg.IniReadValue("SQL Configuration", "SqlUser");
         _Password = CEncoder.Decode(cfg.IniReadValue("SQL Configuration", "SqlPwd"));//解密
         
      }
   }
   
   public void Write()
   {
      IniFile cfg = new IniFile(_iniFile);
      if (cfg != null)
      {
         cfg.IniWriteValue("SQL Configuration", "SqlServer", _ServerName);
         cfg.IniWriteValue("SQL Configuration", "Database", _InitialCatalog);
         cfg.IniWriteValue("SQL Configuration", "SqlUser", _UserName);
         cfg.IniWriteValue("SQL Configuration", "SqlPwd", CEncoder.Encode(_Password)); //加密
      }
   }
   
   
   //配置文件
   public static string ConfigFile
   {
      get { return Application.StartupPath "\\csframework3.ini"; }
   }
   
   //加载连接配置
   public static void LoadConfiguration()
   {
      if (System.IO.File.Exists(ConfigFile))
      {
         IWriteSQLConfigValue cfg = new IniFileWriter(ConfigFile);
         SqlConfiguration.SetSQLConfig(cfg);
      }
      else
      throw new Exception("Program cann't run without a SQL configuration.You should config the SQL connection by running CKG.TECH.Setup.exe!");
   }
   
   public string InitialCatalog { get { return _InitialCatalog; } set { _InitialCatalog = value; } }
   public string ServerName { get { return _ServerName; } set { _ServerName = value; } }
   public string UserName { get { return _UserName; } set { _UserName = value; } }
   public string Password { get { return _Password; } set { _Password = value; } }
   
   #endregion
}


// 来源:www.CSFramework.com, C/S结构框架学习网

//连接参数保存在注册表
public class RegisterWriter : IWriteSQLConfigValue
{
   #region IWriteConfigValue Members
   
   private string _keyPath;
   private string _ServerName;
   private string _Password;
   private string _UserName;
   private string _InitialCatalog;
   
   //构造器
   public RegisterWriter(string keyPath)
   {
      _keyPath = keyPath;
      Read();
   }
   
   public string BuildConnectionString()
   {
      return new SqlConfiguration().GetConnectionString(this);
   }
   
   public void Read()
   {
      RegistryKey key = Registry.LocalMachine.CreateSubKey(_keyPath);
      if (key != null)
      {
         _ServerName = ConvertEx.ToString(key.GetValue("SqlServer", "."));
         _InitialCatalog = ConvertEx.ToString(key.GetValue("SqlDatabase", ""));
         _UserName = ConvertEx.ToString(key.GetValue("SqlUser", "sa"));
         _Password = ConvertEx.ToString(key.GetValue("SqlPwd", ""));
         if (_Password != string.Empty) _Password = CEncoder.Decode(_Password);
         key.Close();
      }
   }
   
   public void Write()
   {
      RegistryKey key = Registry.LocalMachine.CreateSubKey(_keyPath);
      if (key != null)
      {
         key.SetValue("SqlServer", _ServerName);
         key.SetValue("SqlDatabase", _InitialCatalog);
         key.SetValue("SqlUser", _UserName);
         key.SetValue("SqlPwd", CEncoder.Encode(_Password));
         key.Close();
      }
   }
   
   public string InitialCatalog { get { return _InitialCatalog; } set { _InitialCatalog = value; } }
   public string ServerName { get { return _ServerName; } set { _ServerName = value; } }
   public string UserName { get { return _UserName; } set { _UserName = value; } }
   public string Password { get { return _Password; } set { _Password = value; } }
   
   #endregion
}

// 来源:www.CSFramework.com, C/S结构框架学习网