в 15:31, 26 мая 2010

2010-05-26T15:31:35Z

Admin: 1 версия

2010-05-26T12:12:34Z

1 версия

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==BufferedStream.Position==

<source lang="csharp">
using System;
using System.IO;
public class BufStrm
{
static public void Main ()
{
FileStream strm;
strm = new FileStream ("test.txt",FileMode.OpenOrCreate,FileAccess.Write);
strm.SetLength (0);
BufferedStream bstrm = new BufferedStream (strm);
string str = "this is a test";
byte [] b;
StringToByte (out b, str);
bstrm.Write (b, 0, b.Length);
long Pos = bstrm.Position;
Console.WriteLine ("The buffered stream position is "+ bstrm.Position);
Console.WriteLine ("The underlying stream position is "+ strm.Position);
str = "the quick red fox jumps over the lazy brown dog.\r\n";
StringToByte (out b, str);
bstrm.Write (b, 0, b.Length);
Console.WriteLine ("\r\nThe buffered stream position is " +bstrm.Position);
Console.WriteLine ("The underlying stream position is still "+ strm.Position);
bstrm.Seek (Pos, SeekOrigin.Begin);
b[0] = (byte) "T";
bstrm.Write (b, 0, 1);
bstrm.Flush ();
bstrm.Close ();
strm.Close ();
}
static void StringToByte (out byte [] b, string str)
{
b = new byte [str.Length];
for (int x = 0; x < str.Length; ++x)
{
b[x] = (byte) str [x];
}
}
}

</source>

==BufferedStream.Read==

<source lang="csharp">

using System;
using System.IO;
class BufStreamApp
{
static void Main(string[] args)
{
FileStream fs = new FileStream("Hoo.txt",FileMode.Create, FileAccess.ReadWrite);
BufferedStream bs = new BufferedStream(fs);
Console.WriteLine("Length: {0}\tPosition: {1}",bs.Length, bs.Position);

for (int i = 0; i < 64; i++)
{
bs.WriteByte((byte)i);
}
Console.WriteLine("Length: {0}\tPosition: {1}", bs.Length, bs.Position);
byte[] ba = new byte[bs.Length];
bs.Position = 0;
bs.Read(ba, 0, (int)bs.Length);
foreach (byte b in ba)
{
Console.Write("{0,-3}", b);
}

string s = "Foo";
for (int i = 0; i < 3; i++)
{
bs.WriteByte((byte)s[i]);
}
Console.WriteLine("\nLength: {0}\tPosition: {1}\t",bs.Length, bs.Position);

for (int i = 0; i < (256-67)+1; i++)
{
bs.WriteByte((byte)i);
}
Console.WriteLine("\nLength: {0}\tPosition: {1}\t", bs.Length, bs.Position);

bs.Close();
}
}

</source>

==BufferedStream.Write==

<source lang="csharp">
using System;
using System.Windows.Forms;
using System.IO;
public class MainClass
{
public static void Main()
{
OpenFileDialog dlgOpen = new OpenFileDialog();
dlgOpen.Title="Select file to back up";
if (dlgOpen.ShowDialog() == DialogResult.OK)
{
FileStream inStream = File.OpenRead(dlgOpen.FileName);
FileStream outStream = File.OpenWrite(dlgOpen.FileName + ".bak");
BufferedStream bufInStream = new BufferedStream(inStream);
BufferedStream bufOutStream = new BufferedStream(outStream);
byte[] buf = new byte[4096];
int bytesRead;
while ((bytesRead = bufInStream.Read(buf, 0, 4096)) > 0)
bufOutStream.Write(buf, 0, bytesRead);
bufOutStream.Flush();
bufOutStream.Close();
bufInStream.Close();
outStream.Close();
inStream.Close();
}
}
}

</source>

==BufferedStream.WriteByte==

<source lang="csharp">

using System;
using System.IO;
class BufStreamApp
{
static void Main(string[] args)
{
FileStream fs = new FileStream("Hoo.txt",FileMode.Create, FileAccess.ReadWrite);
BufferedStream bs = new BufferedStream(fs);
Console.WriteLine("Length: {0}\tPosition: {1}",bs.Length, bs.Position);

for (int i = 0; i < 64; i++)
{
bs.WriteByte((byte)i);
}
Console.WriteLine("Length: {0}\tPosition: {1}", bs.Length, bs.Position);
byte[] ba = new byte[bs.Length];
bs.Position = 0;
bs.Read(ba, 0, (int)bs.Length);
foreach (byte b in ba)
{
Console.Write("{0,-3}", b);
}

string s = "Foo";
for (int i = 0; i < 3; i++)
{
bs.WriteByte((byte)s[i]);
}
Console.WriteLine("\nLength: {0}\tPosition: {1}\t",bs.Length, bs.Position);

for (int i = 0; i < (256-67)+1; i++)
{
bs.WriteByte((byte)i);
}
Console.WriteLine("\nLength: {0}\tPosition: {1}\t", bs.Length, bs.Position);

bs.Close();
}
}

</source>

==new BufferedStream(FileStream fs)==

<source lang="csharp">
using System;
using System.IO;
public class MainClass
{
public static int Main(string[] args)
{
FileStream dumpFile = new FileStream("Dump.dat", FileMode.Create, FileAccess.ReadWrite);
BufferedStream myFileBuffer = new BufferedStream(dumpFile);

byte[] str = {127, 0x77, 0x4, 0x0, 0x0, 0x16};
myFileBuffer.Write(str, 0, str.Length);
// add changes to file.
myFileBuffer.Close(); // Flushes.
dumpFile.Close(); // Flushes.
return 0;
}
}

</source>

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в 15:31, 26 мая 2010

Admin: 1 версия