VB.Net/File Directory/Memory Stream

Материал из VB Эксперт
Версия от 12:45, 26 мая 2010; Admin (обсуждение | вклад) (1 версия)
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MemoryStream Demo

Imports System.Data
Imports System.IO
Imports System.IO.IsolatedStorage
Imports System.Text
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters
Imports System.Runtime.Serialization.Formatters.Soap
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Windows.Forms
Public Class MainClass
    
    Shared Sub Main(ByVal args As String())
        Dim s As String = "111"
        Dim n As Integer = 452
        Dim mstream As Stream = New MemoryStream()
        " Write to the stream
        Dim bytes1() As Byte = UnicodeEncoding.Unicode.GetBytes(s)
        Dim bytes2() As Byte = BitConverter.GetBytes(n)
        mstream.Write(bytes1, 0, bytes1.Length)
        mstream.Write(bytes2, 0, bytes2.Length)
        " Reset the stream to the beginning
        mstream.Seek(0, SeekOrigin.Begin)
        " Read from the stream
        Dim bytes3(mstream.Length - 4) As Byte
        Dim bytes4(4) As Byte
        mstream.Read(bytes3, 0, bytes3.Length)
        mstream.Read(bytes4, 0, bytes4.Length)
        " Do something with the data
        Console.WriteLine(UnicodeEncoding.Unicode.GetString(bytes3) + " " + BitConverter.ToInt32(bytes4, 0))
    End Sub
End Class


Memory Stream Writer and Reader

Imports System
Imports System.IO
Imports System.Text

Public Class MainClass
   Shared Sub Main()
        Dim memory_stream As New MemoryStream()
        Dim binary_writer As New BinaryWriter(memory_stream)
        binary_writer.Write("www.vbex.ru")
        Dim binary_reader As New BinaryReader(memory_stream)
        memory_stream.Seek(0, SeekOrigin.Begin)
        Console.WriteLine(binary_reader.ReadString())
        binary_reader.Close()
   End Sub 
End Class


Stream Reader and Writer for a MemoryStream

Imports System
Imports System.IO
Imports System.Text

Public Class MainClass
   Shared Sub Main()
        Dim memory_stream As New MemoryStream()
        Dim stream_writer As New StreamWriter(memory_stream)
        stream_writer.Write("www.vbex.ru")
        stream_writer.Flush()
        Dim stream_reader As New StreamReader(memory_stream)
        memory_stream.Seek(0, SeekOrigin.Begin)
        Console.WriteLine(stream_reader.ReadToEnd())
        stream_reader.Close()
   End Sub 
End Class