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Byte Array from DateTime ArrayI'm trying to serialize a DateTime [] into a Byte []. Buffer.BlockCopy
doesn-t work because DateTime is not a primitive type. Is there a way to cast from DateTime [] to Byte [] in the "safe" world? In .NET 2.0 there is a method DateTime.ToBinary(...)
In .NET 1.1 you use DateTime.ToFileTimeMethod() Show quote "Daniel" <dfi***@hotmail.com> wrote in message news:1135693184.539197.298350@z14g2000cwz.googlegroups.com... > I'm trying to serialize a DateTime [] into a Byte []. Buffer.BlockCopy > doesn-t work because DateTime is not a primitive type. > Is there a way to cast from DateTime [] to Byte [] in the "safe" world? > Yes, I was aware of those methods, but it will involve a for loop to get
the Binary value of each item in the array. As I'm looking to persist a Byte [] array as fast as possible, I was looking for a direct method of accessing the DateTime [] as Byte []. (My underlying problem is to persist big amounts of DateTimes in a Database. Instead of generating one db record per value, I prefer to store a binary serialization in a BLOB field). With doubles this is easy due to Buffer.BlockCopy. But i was unable to find a fast alternative for my DateTime arrays. Txs "accessing the DateTime [] as Byte []" you mean the access like in stream?
You can use Ticks property instead of GetFileTime(...). Then it will not be necessary to perform any conversions ( all datetime time/date props are based on ticks), simply: -get DateTime from array -write Ticks into byte[] ( MemoryStream is better for such operations ) Show quote "Daniel" <dfi***@hotmail.com> wrote in message news:eLXLy9vCGHA.1676@TK2MSFTNGP09.phx.gbl... > Yes, I was aware of those methods, but it will involve a for loop to get > the Binary value of each item in the array. As I'm looking to persist a > Byte [] array as fast as possible, I was looking for a direct method of > accessing the DateTime [] as Byte []. > (My underlying problem is to persist big amounts of DateTimes in a > Database. Instead of generating one db record per value, I prefer to > store a binary serialization in a BLOB field). > With doubles this is easy due to Buffer.BlockCopy. But i was unable to > find a fast alternative for my DateTime arrays. > Txs > > > -- > Sent via .NET Newsgroups > http://www.dotnetnewsgroups.com Daniel <dfi***@hotmail.com> wrote:
> Yes, I was aware of those methods, but it will involve a for loop to get When you say you were unable to find a "fast" alternative - have you > the Binary value of each item in the array. As I'm looking to persist a > Byte [] array as fast as possible, I was looking for a direct method of > accessing the DateTime [] as Byte []. > (My underlying problem is to persist big amounts of DateTimes in a > Database. Instead of generating one db record per value, I prefer to > store a binary serialization in a BLOB field). > With doubles this is easy due to Buffer.BlockCopy. But i was unable to > find a fast alternative for my DateTime arrays. benchmarked the "simple" solution of iterating through the array? I suspect you'll find that fast enough. I would suggest you use the Ticks property to convert each DateTime to a long. There are various ways you can then get this into a byte array. To save creating a load of small byte arrays, you might want to use my miscellaneous utility library's EndianBitConverter which has CopyBytes as well as GetBytes, to copy the converted value into an existing byte array. You can download the library from http://www.pobox.com/~skeet/csharp/miscutil -- Jon Skeet - <sk***@pobox.com> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet If replying to the group, please do not mail me too  |
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