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.NET Forum / .NET Framework / CLR / November 2006Question about data size when using serialized writing using BinaryFormatter
I am writing a structure marked as serializable to a data file using the BinaryFormatter. The structure does not inherit from any other types. If I were to add up the byte size of all the data contained within the structure, I get about 50 bytes. However, when I write the data to the file with BinaryFormatter, the resulting file size is much more (around 229 bytes). Can someone explain why the resulting size of the written data is so large? I am assuming that maybe some other data is written from the base Object class, but it still seems quite excessive. Is there anyway to trim down the size of data written to be more efficient with the storage during serialization?  Signature----------------------------------- Ken Varn Senior Software Engineer Diebold Inc. EmailID = varnk Domain = Diebold.com ----------------------------------- Hi Ken! > I am writing a structure marked as serializable to a data file using > the BinaryFormatter. The structure does not inherit from any other [quoted text clipped - 5 lines] > Can someone explain why the resulting size of the written data is so > large? As Vadym pointed out, the metadata serialization takes some space. > Is there anyway to trim down the size of data written to be more > efficient with the storage during serialization? You can implement ISerializable. Within the GetObjectData() method, you perform a custom serialization (maybe with minimal metadata - or even no metadata when you know the size and the position of all elements) within a byte - Array. This byte Array you can add to the SerializationInfo object in one call. Even if the .Net Infrastructure adds metadata for the byte-Array, it is much smaller! GP I tried implementing ISerializable in my class, but still yield about the same size. How do you reduce the amount of data that the Serialization object provides? I have a StructLayout attribute on my class and thought that maybe I could somehow tie that into serialization in a similar way it is used for marshalling, but that is not available. Signature----------------------------------- Ken Varn Senior Software Engineer Diebold Inc. EmailID = varnk Domain = Diebold.com ----------------------------------- Hi Ken! > I am writing a structure marked as serializable to a data file using > the BinaryFormatter. The structure does not inherit from any other [quoted text clipped - 5 lines] > Can someone explain why the resulting size of the written data is so > large? As Vadym pointed out, the metadata serialization takes some space. > Is there anyway to trim down the size of data written to be more > efficient with the storage during serialization? You can implement ISerializable. Within the GetObjectData() method, you perform a custom serialization (maybe with minimal metadata - or even no metadata when you know the size and the position of all elements) within a byte - Array. This byte Array you can add to the SerializationInfo object in one call. Even if the .Net Infrastructure adds metadata for the byte-Array, it is much smaller! GP Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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