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What is CArchive class dowes?
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Answer / songeetha
CArchive is a temporary buffer area for handling datas
between CMap and CFile. The datas from the user are first
entered in CMap and then from this CMap, they are stored to
CFile through CArchive Class, while closing the application.
When opening the application the datas from CFile are
loaded into CMap through CArchive.
At first CFile should be opened or created before creating
instance for CArchive. After transferring of datas between
CMap and CArchive, CArchive instance should be closed first
before closing the CFile. The vice-versa action will
results in crashing of application.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / sonali d
CArchive is used with serilization.Serilization is nothing
but technique to save an application persistent data to
disk or read it to back.this is done through CArchive which
uses CFile function to perform I/O.
MFC oveload << and >> operator used with CArchive to make
serilizing data to or from CArchive simple
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / krishna akkulu
CArchive does not have a base class.archive object as a
kind of binary stream
You must create a CFile object before you can create a
CArchive object.
When you construct a CArchive object, you attach it to an
object of class CFile (or a derived class) that represents
an open file.
CArchive also supports programming with the MFC Windows
Sockets classes CSocket and CSocketFile. The IsBufferEmpty
member function supports that usage.
| Is This Answer Correct ? | 2 Yes | 1 No |
CArchive does not have a base class.
Later you can load the objects from persistent storage, reconstituting them in memory. This process of making data persistent is called "serialization."
You can think of an archive object as a kind of binary stream. Like an input/output stream, an archive is associated with a file and permits the buffered writing and reading of data to and from storage. An input/output stream processes sequences of ASCII characters, but an archive processes binary object data in an efficient, nonredundant format.
You must create a CFile object before you can create a CArchive object.
| Is This Answer Correct ? | 0 Yes | 0 No |
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