private List <E> LoadFromReader <E>(TableAliasNameManager aliasManager, IDataReader reader)
where E : EntityBase
{
List <E> lst = new List <E>();
if (reader != null && !reader.IsClosed)
{
aliasManager.InitMapping(reader);
while (reader.Read())
{
object value = aliasManager.LoadFromReader(reader);
if (value != null)
{
E obj = value as E;
//obj.SetBaseList(lst);
lst.Add(obj);
}
}
}
return(lst);
}
/// <summary>
/// 获取第一条记录
/// </summary>
/// <typeparam name="E"></typeparam>
/// <param name="BQL"></param>
/// <returns></returns>
public E GetUnique <E>(BQLQuery BQL, bool useCache)
where E : EntityBase, new()
{
Type tableType = typeof(E);
TableAliasNameManager aliasManager = new TableAliasNameManager(new BQLEntityTableHandle(EntityInfoManager.GetEntityHandle(tableType)));
AbsCondition con = BQLKeyWordManager.ToCondition(BQL, _oper.DBInfo, aliasManager, true);
Dictionary <string, bool> cacheTables = null;
if (useCache)
{
cacheTables = con.CacheTables;
}
string sql = con.DBinfo.CurrentDbAdapter.GetTopSelectSql(con as SelectCondition, 1);
E ret = default(E);
IDataReader reader = _oper.Query(sql, con.DbParamList, cacheTables);
try
{
con.Oper = _oper;
bool hasValue = true;
aliasManager.InitMapping(reader);
if (reader.Read())
{
ret = aliasManager.LoadFromReader(reader) as E;
}
}
finally
{
if (reader != null)
{
reader.Close();
}
}
return(ret);
}