/// <summary>
/// Gets next record. Returns true if end of file reached and there are no more records.
/// </summary>
/// <returns>Returns true if end of file reached and there are no more records.</returns>
public bool NextRecord()
{
if (!this.IsDatabaseOpen)
{
throw new Exception("Database isn't open, please open database first !");
}
//--- Find next record ---------------------------------------------------//
long nextRowStartOffset = 0;
if (m_pCurrentRecord == null)
{
nextRowStartOffset = m_RowsStartOffset;
}
else
{
nextRowStartOffset = m_pCurrentRecord.Pointer + m_RowLength;
}
while (true)
{
if (m_FileLength > nextRowStartOffset)
{
ReadFromFile(nextRowStartOffset, m_RowDataBuffer, 0, m_RowLength);
// We want used row
if (m_RowDataBuffer[0] == 'u')
{
if (m_pCurrentRecord == null)
{
m_pCurrentRecord = new lsDB_FixedLengthRecord(this, nextRowStartOffset, m_RowDataBuffer);
}
else
{
m_pCurrentRecord.ReuseRecord(this, nextRowStartOffset, m_RowDataBuffer);
}
break;
}
}
else
{
return(true);
}
nextRowStartOffset += m_RowLength;
}
//-------------------------------------------------------------------------//
return(false);
}
/// <summary>
/// Closes database file.
/// </summary>
public void Close()
{
if (m_pDbFile != null)
{
m_pDbFile.Close();
m_pDbFile = null;
m_DbFileName = "";
m_FileLength = 0;
m_FilePosition = 0;
m_RowLength = 0;
m_ColumnsStartOffset = 0;
m_RowsStartOffset = 0;
m_TableLocked = false;
m_RowDataBuffer = null;
m_pCurrentRecord = null;
}
}
/// <summary>
/// Moves to first record.
/// </summary>
public void MoveFirstRecord()
{
m_pCurrentRecord = null;
// NextRecord();
}
/// <summary>
/// Gets next record. Returns true if end of file reached and there are no more records.
/// </summary>
/// <returns>Returns true if end of file reached and there are no more records.</returns>
public bool NextRecord()
{
if(!this.IsDatabaseOpen){
throw new Exception("Database isn't open, please open database first !");
}
//--- Find next record ---------------------------------------------------//
long nextRowStartOffset = 0;
if(m_pCurrentRecord == null){
nextRowStartOffset = m_RowsStartOffset;
}
else{
nextRowStartOffset = m_pCurrentRecord.Pointer + m_RowLength;
}
while(true){
if(m_FileLength > nextRowStartOffset){
ReadFromFile(nextRowStartOffset,m_RowDataBuffer,0,m_RowLength);
// We want used row
if(m_RowDataBuffer[0] == 'u'){
if(m_pCurrentRecord == null){
m_pCurrentRecord = new lsDB_FixedLengthRecord(this,nextRowStartOffset,m_RowDataBuffer);
}
else{
m_pCurrentRecord.ReuseRecord(this,nextRowStartOffset,m_RowDataBuffer);
}
break;
}
}
else{
return true;
}
nextRowStartOffset += m_RowLength;
}
//-------------------------------------------------------------------------//
return false;
}
/// <summary>
/// Moves to first record.
/// </summary>
public void MoveFirstRecord()
{
m_pCurrentRecord = null;
// NextRecord();
}
/// <summary>
/// Closes database file.
/// </summary>
public void Close()
{
if(m_pDbFile != null){
m_pDbFile.Close();
m_pDbFile = null;
m_DbFileName = "";
m_FileLength = 0;
m_FilePosition = 0;
m_RowLength = 0;
m_ColumnsStartOffset = 0;
m_RowsStartOffset = 0;
m_TableLocked = false;
m_RowDataBuffer = null;
m_pCurrentRecord = null;
}
}