public DataStreamFunction(VehicleDB db, IChannel chn, IFormat format)
: base(db, chn, format)
{
stopRead = true;
stopCalc = true;
readExp = false;
lds = null;
readInterval = Timer.FromMilliseconds(10);
calcInterval = Timer.FromMilliseconds(1);
readMutex = new Mutex();
calcMutex = new Mutex();
taskFactory = new TaskFactory();
tasks = null;
readBuff = new byte[128];
historyBuff = new Dictionary<string, byte[]>();
BeginRead = null;
EndRead = null;
BeginCalc = null;
EndCalc = null;
}
public LiveDataList QueryLiveData(string cls)
{
Action ThrowException = () =>
{
throw new DatabaseException(String.Format("Query live data fail by class = {0}", cls));
};
try
{
liveDataCommand.Prepare();
liveDataCommand.Parameters[0].Value = EncryptLang;
liveDataCommand.Parameters[1].Value = Encrypt(cls);
using (var reader = liveDataCommand.ExecuteReader())
{
LiveDataList list = new LiveDataList();
while (reader.Read())
{
LiveDataItem item = new LiveDataItem();
item.ShortName = DBCrypto.DecryptToString(reader.GetFieldValue<byte[]>(0));
item.Content = DBCrypto.DecryptToString(reader.GetFieldValue<byte[]>(1));
item.Unit = reader.IsDBNull(2) ? "" : DBCrypto.DecryptToString(reader.GetFieldValue<byte[]>(2));
item.DefaultValue = reader.IsDBNull(3) ? "" : DBCrypto.DecryptToString(reader.GetFieldValue<byte[]>(3));
if (!reader.IsDBNull(4) && !reader.IsDBNull(5))
{
item.CmdName = DBCrypto.DecryptToString(reader.GetFieldValue<byte[]>(4));
item.CmdClass = DBCrypto.DecryptToString(reader.GetFieldValue<byte[]>(5));
item.Command = QueryCommand(item.CmdName, item.CmdClass);
}
item.Description = reader.IsDBNull(6) ? "" : DBCrypto.DecryptToString(reader.GetFieldValue<byte[]>(6));
byte[] indexArray = DBCrypto.DecryptToBytes(reader.GetFieldValue<byte[]>(7));
int index = ((indexArray[3] & 0xFF) << 24) +
((indexArray[2] & 0xFF) << 16) +
((indexArray[1] & 0xFF) << 8) +
(indexArray[0] & 0xFF);
item.IndexForSort = index;
list.Add(item);
}
return list;
}
}
catch
{
ThrowException();
}
ThrowException();
return null;
}
public bool QueryLiveData(string cls)
{
try
{
lds = Database.QueryLiveData(cls);
InitCalcDelegates();
return true;
}
catch
{
}
return false;
}
