/// <summary>
/// 获取单例的信息
/// </summary>
/// <param name="con">数据库连接字符串</param>
/// <returns></returns>
public static IDbHelper GetInstance(string con)
{
if (null == instance)
{
lock (lockHelper)
{
if (null == instance)
{
instance = new MSSqlHelper(con);
}
}
}
return(instance);
}
/// <summary>
/// 获取数据库的操作对象，根据配置信息
/// </summary>
/// <param name="connKey"></param>
/// <returns></returns>
public static IDbHelper GetDbHelper(string connKey)
{
//先看连接的缓存，如果在缓存中存在，则直接返回缓存内容。
if (dbHelperTemps.ContainsKey(connKey))
{
return(dbHelperTemps[connKey]);
}
IDbHelper dbHelper = null;
ConnectionStringSettings connSetting = GetConnSetting(connKey);
switch (connSetting.ProviderName)
{
case "System.Data.SqlClient": //SqlServer数据库的处理
dbHelper = MSSqlHelper.GetNewInstance(connSetting.ConnectionString);
break;
case "System.Data.SqlLite":
dbHelper = SqliteHelper.GetNewInstance(connSetting.ConnectionString);
break;
case "System.Data.OracleClient":
dbHelper = OracleHelper.GetNewInstance(connSetting.ConnectionString);
break;
case "MySql.Data.MySqlClient":
dbHelper = MySqlHelper.GetNewInstance(connSetting.ConnectionString);
break;
default:
break;
}
if (dbHelper != null)
{
dbHelperTemps.Add("dbconn", dbHelper);
}
return(dbHelper);
}
