public void Delete()
{
List <SubnodeLeafBlock> leaves = GetLeafBlocks();
foreach (SubnodeLeafBlock leaf in leaves)
{
foreach (SubnodeLeafEntry entry in leaf.rgentries)
{
Subnode subnode = Subnode.GetSubnode(this.File, entry);
subnode.Delete();
}
DeleteBlock(leaf);
}
// we could have already deleted our root block (if it's a leaf)
if (m_rootBlock is SubnodeIntermediateBlock)
{
DeleteBlock(m_rootBlock);
}
m_rootBlock = null;
SaveChanges();
}
/// <summary>
/// Add column to an empty table context.
/// If this is a Contents Table, the caller should call UpdateMessage() afterwards.
/// Similarly, for attachment table, the caller should call UpdateAttachment().
/// </summary>
public void AddPropertyColumn(PropertyID propertyID, PropertyTypeName propertyType)
{
TableColumnDescriptor newColumnDescriptor = new TableColumnDescriptor();
newColumnDescriptor.PropertyID = propertyID;
newColumnDescriptor.PropertyType = propertyType;
newColumnDescriptor.iBit = (byte)m_tcInfo.ColumnCount;
newColumnDescriptor.cbData = (byte)GetPropertyDataLength(propertyType);
// Set the ibData:
// http://social.msdn.microsoft.com/Forums/en-US/os_binaryfile/thread/a5f9c653-40f5-4638-85d3-00c54607d984/
// PidTagLtpRowId and PidTagLtpRowVer must not be relocated
if (newColumnDescriptor.DataLengthGroup == TableContextInfo.TCI_4b)
{
newColumnDescriptor.ibData = m_tcInfo.rgib[TableContextInfo.TCI_4b];
}
else if (newColumnDescriptor.DataLengthGroup == TableContextInfo.TCI_2b)
{
newColumnDescriptor.ibData = m_tcInfo.rgib[TableContextInfo.TCI_2b];
}
else
{
newColumnDescriptor.ibData = m_tcInfo.rgib[TableContextInfo.TCI_1b];
}
// We call GetRedistributedRows() before adding the new column:
List <byte[]> rows = GetRedistributedRows(newColumnDescriptor.ibData, newColumnDescriptor.cbData);
// add the new column
m_tcInfo.rgTCOLDESC.Add(newColumnDescriptor);
// redistribute column descriptions
ushort offset = (ushort)(newColumnDescriptor.ibData + newColumnDescriptor.cbData);
for (int groupIndex = newColumnDescriptor.DataLengthGroup + 1; groupIndex < 3; groupIndex++)
{
for (int index = 0; index < m_tcInfo.rgTCOLDESC.Count; index++)
{
TableColumnDescriptor descriptor = m_tcInfo.rgTCOLDESC[index];
if (groupIndex == descriptor.DataLengthGroup)
{
// changes to descriptor will be saved when calling UpdateTableContextInfo()
descriptor.ibData = offset;
offset += descriptor.cbData;
}
}
}
// update the group ending offset
m_tcInfo.UpdateDataLayout();
m_rowsPerBlock = (int)Math.Floor((double)DataBlock.MaximumDataLength / RowLength);
// Update the rows data
if (!m_tcInfo.hnidRows.IsEmpty)
{
if (m_tcInfo.hnidRows.IsHeapID)
{
m_heap.RemoveItemFromHeap(m_tcInfo.hnidRows.HeapID);
CreateSubnodeForRows();
}
else
{
if (m_subnodeRows == null)
{
m_subnodeRows = m_subnodeBTree.GetSubnode(m_tcInfo.hnidRows.NodeID);
}
m_subnodeRows.Delete(); // this will set the subnode data-tree to null
// New data tree will be created when the first row will be added
m_subnodeBTree.UpdateSubnodeEntry(m_tcInfo.hnidRows.NodeID, null, null);
}
for (int index = 0; index < rows.Count; index++)
{
AddRowToSubnode(index, rows[index]);
}
}
UpdateTableContextInfo();
}