/// <summary>
/// 根据数据库的逻辑名称创建Database实例
/// </summary>
/// <param name="name">数据库逻辑名称</param>
/// <returns>Database实例</returns>
public static Database Create(string name)
{
ExceptionHelper.CheckStringIsNullOrEmpty(name, "name");
//// 根据数据驱动名称对应的数据库实体
//// 如果以后需要开放DeluxeWorks.Db提供自动加载第三方Database类型的话，也仅需要修改这个方法
//switch (DbConnectionManager.GetDbProviderName(name))
//{
// case "System.Data.SqlClient":
// return new SqlDatabase(name);
// case "System.Data.OracleClient":
// return new OracleDatabase(name);
// //case "Oracle.DataAccess.Client":
// // return new ODP.OracleDatabase(name);
// default:
// throw new NotSupportedException(name + " 所定义的数据驱动不支持");
//}
return(DbConnectionManager.GetDataProvider(name) as Database);
}
/// <summary>
/// 根据名称得到当前引用的连接
/// </summary>
/// <param name="connName">数据库连接名称</param>
/// <returns>连接对象</returns>
protected ReferenceConnection GetRefConnectionWithoutTx(string connName)
{
ReferenceConnection refConnection = null;
GraphWithoutTransaction connections = GraphWithoutTx;
lock (connections)
{
if (connections.TryGetValue(connName, out refConnection) == false)
{
DbConnection connection = DbConnectionManager.GetConnection(connName);
this.isConnectionCreator = true;
refConnection = new ReferenceConnection(connName, connection);
connections.Add(connName, refConnection);
}
else
{
refConnection.ReferenceCount++;
}
}
return(refConnection);
}