protected void SetSymbol(DZHSymbol symbol)
{
if ((currentSymbol == null) || (!currentSymbol.Equals(symbol)))
{
currentSymbol = symbol;
OnSymbolChanged();
}
}
public List <DZHTick> RequestLastTicks(DZHSymbol symbol)
{
if (symbol.Equals(currentSymbol))
{
long pos = indexBuffer[symbol.Market][symbol.Code];
fileStream.Position = pos + 10;
recordCount = reader.ReadInt32();
if (recordCount > recordCountReaded)//有新记录
{
int recordsPerBlock = dataBlockSize / dataRecordSize;
if (recordCount / recordsPerBlock > blockNumberReaded)//有新块号
{
fileStream.Position += blockNumberReaded * 2;
for (int j = blockNumberReaded; j < 25; j++)
{
blocks[j] = reader.ReadInt16();
}
}
int iRecord = 0; //记录
int iBlock = 0; //第iBlock块
iRecord = recordCountReaded;
iBlock = iRecord / recordsPerBlock;
List <DZHTick> results = new List <DZHTick>();
while (iBlock < 25 && blocks[iBlock] != -1)
{
int r = iRecord % recordsPerBlock;//块内记录号
while (iRecord < recordCount && r < recordsPerBlock)
{
results.Add(ReadARecord(dataStartOffset + blocks[iBlock] * dataBlockSize + r * dataRecordSize));
r = r + 1;
iRecord = iRecord + 1;
}
iBlock = iBlock + 1;
}
recordCountReaded = recordCount;
blockNumberReaded = iBlock;
return(results);
}
else
{
return(null);
}
}
else
{
return(RequestTicks(symbol));
}
}