| Description |
A memory stream supports direct access to sections of the stream. You might, for example, want to treat the stream as a set of records, and then Seek to a certain record in order to update the values.
You can seek to a specified byte Offset from one of the following Origin values :
| SeekOrigin.Begin | Byte 0 of the stream |
| SeekOrigin.Current | The current stream position |
| SeekOrigin.End | After the final byte of the stream |
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| | References | SeekOrigin
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| Microsoft MSDN Links |
System.IO
System.IO.MemoryStream
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| Gettting the first and last bytes of a Memory Stream |
program Project1;
{$APPTYPE CONSOLE}
uses
System.IO;
var
Memory : System.IO.MemoryStream;
begin
// Create our Memory Stream
Memory := System.IO.MemoryStream.Create;
// Write to the stream
Memory.WriteByte(1);
Memory.WriteByte(2);
Memory.WriteByte(3);
Memory.WriteByte(4);
Memory.WriteByte(5);
Memory.WriteByte(6);
Memory.WriteByte(7);
Memory.WriteByte(8);
Memory.WriteByte(9);
// Move to the start of the stream
Memory.Seek(0, SeekOrigin.Begin);
// Display the byte at this position
Console.WriteLine('At offset 0 from the Beginning : {0}',
Memory.ReadByte.ToString);
// Move to the byte at the end of the stream
Memory.Seek(-1, SeekOrigin.End);
// Display the byte at this position
Console.WriteLine('At offset -1 from the End : {0}',
Memory.ReadByte.ToString);
// Close the memory stream
Memory.Close;
Console.Readline;
end.
| | Show full unit code | At offset 0 from the Beginning : 1
At offset -1 from the End : 9
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