public DynaRecord(QryDef qryDef)
{
qry_name = qryDef.qry_name;
//dynamic properties
FieldDict = new Dictionary <String, IDynaField>(16);
//ordinal properties
ReadList = new List <IDynaField>(16);
lockObj = new Object();
}
public DynaRecord GetDynaRecord(string key)
{
lock (lockObj)
{
DynaRecord dynaRecord = null;
//поискать в кэше объектов
if (recDict.TryGetValue(key, out dynaRecord))
{
return(dynaRecord);
}
//иначе создать DynaRecord
QryDef qryDef = qryList.Find(qry => qry.qry_name == key);
if (qryDef == null)
{
dataMod.lastError = string.Format("Запрос {0} не найден!", key);
return(null);
}
dynaRecord = new DynaRecord(qryDef)
{
//Адаптер для работы с DB
Query = new DataQuery(GetConnection(), key),
//Для чтения json-потока
StreamReader = new JsonStreamReader(),
//Для записи в json-поток
StreamWriter = new TextStreamWriter()
};
//загрузить описания всех колонок
foreach (FldDef fldDef in fldList.Where(fld => fld.qry_name == qryDef.fld_dict))
{
dynaRecord.CreateField(fldDef);
}
//добавить в кэш объектов
recDict.Add(key, dynaRecord);
return(dynaRecord);
}
}
public bool LoadMeta()
{
loaded = false;
IDbConnection dbConn = null;
IDbCommand qryComm = null, fldComm = null;
IDataReader qryReader = null, fldReader = null;
try
{
recDict.Clear();
//get connection from pool
dbConn = GetConnection();
dbConn.Open();
//qryDict
qryComm = dbConn.CreateCommand();
qryComm.CommandType = CommandType.Text;
qryComm.CommandText = "select Qry_Name, Qry_Head, Qry_Lord, Fld_Dict, Qry_Mask from T_QryDict";
qryReader = qryComm.ExecuteReader();
qryList.Clear();
while (qryReader.Read())
{
QryDef qryDef = new QryDef();
qryDef.qry_name = qryReader.GetString(0);
qryDef.qry_head = qryReader.GetString(1);
qryDef.qry_lord = qryReader.GetString(2);
qryDef.fld_dict = qryReader.GetString(3);
qryDef.qry_mask = qryReader.GetInt32(4);
qryList.Add(qryDef);
}
qryReader.Close();
//fldList
fldComm = dbConn.CreateCommand();
fldComm.CommandType = CommandType.Text;
fldComm.CommandText = "select Qry_Name, Fld_Name, Fld_Head, Fld_Type, Fld_Size, Inp_Mask, Out_Mask, Def_Val from T_FldDict";
fldReader = fldComm.ExecuteReader();
fldList.Clear();
while (fldReader.Read())
{
FldDef fldDef = new FldDef();
fldDef.qry_name = fldReader.GetString(0);
fldDef.fld_name = fldReader.GetString(1);
fldDef.fld_head = fldReader.GetString(2);
fldDef.fld_type = fldReader.GetInt32(3);
fldDef.fld_size = fldReader.GetInt32(4);
fldDef.inp_mask = fldReader.GetInt32(5);
fldDef.out_mask = fldReader.GetInt32(6);
fldDef.def_val = fldReader.GetString(7);
fldList.Add(fldDef);
}
fldReader.Close();
loaded = true;
}
catch (DbException sx)
{
//if (ShowError != null) ShowError(sx.Message);
lastError = sx.Message;
}
catch (Exception ex)
{
//if (ShowError != null) ShowError(ex.Message);
lastError = ex.Message;
}
finally
{
if (fldReader != null)
{
fldReader.Close();
}
if (qryReader != null)
{
qryReader.Close();
}
if (dbConn != null)
{
dbConn.Close();
}
}
return(loaded);
}
