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Visual C++ .NET/File Directory/FileStream - История изменений
2026-04-29T17:59:19Z
История изменений этой страницы в вики
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http://nfex.ru/index.php?title=Visual_C%2B%2B_.NET/File_Directory/FileStream&diff=3658&oldid=prev
в 15:31, 26 мая 2010
2010-05-26T15:31:02Z
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Admin: 1 версия
2010-05-26T12:05:49Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==Create and save binary file with FileStream==<br />
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<br />
<br />
<source lang="csharp"> <br />
#include "stdafx.h"<br />
using namespace System;<br />
using namespace System::IO;<br />
void main()<br />
{<br />
FileStream ^fso = gcnew FileStream("file.dat", FileMode::Create,FileAccess::Write, FileShare::None);<br />
array<unsigned char>^ data = gcnew array<unsigned char> { "T", "h", "i","\r", "\n" };<br />
for (int i = 0; i < data->Length-5; i += 5)<br />
{<br />
fso->Write(data, i, 5);<br />
}<br />
<br />
fso->Close();<br />
<br />
}<br />
<br />
</source><br />
<br />
<br />
==Get binary file length==<br />
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<br />
<br />
<source lang="csharp"> <br />
#include "stdafx.h"<br />
using namespace System;<br />
using namespace System::IO;<br />
void main()<br />
{<br />
FileStream ^fso = gcnew FileStream("file.dat", FileMode::Create,FileAccess::Write, FileShare::None);<br />
array<unsigned char>^ data = gcnew array<unsigned char> { "T", "h", "i","\r", "\n" };<br />
for (int i = 0; i < data->Length-5; i += 5)<br />
{<br />
fso->Write(data, i, 5);<br />
}<br />
<br />
fso->Close();<br />
FileInfo ^fi = gcnew FileInfo("file.dat");<br />
FileStream ^fsi = fi->OpenRead();<br />
int fileLength = (int)fi->Length;<br />
int b;<br />
while ((b = fsi->ReadByte()) != -1)<br />
{<br />
Console::Write((Char)b);<br />
}<br />
fsi->Position = 0;<br />
array<unsigned char>^ ca = gcnew array<unsigned char>(fileLength);<br />
fsi->Read(ca, 0, fileLength);<br />
for (int i = 0; i < ca->Length; i++)<br />
{<br />
Console::Write((Char)ca[i]);<br />
}<br />
fsi->Close();<br />
fi->Delete();<br />
}<br />
<br />
</source><br />
<br />
<br />
==Read binary file to an array==<br />
<br />
<br />
<br />
<source lang="csharp"> <br />
#include "stdafx.h"<br />
using namespace System;<br />
using namespace System::IO;<br />
void main()<br />
{<br />
FileStream ^fso = gcnew FileStream("file.dat", FileMode::Create,FileAccess::Write, FileShare::None);<br />
array<unsigned char>^ data = gcnew array<unsigned char> { "T", "h", "i","\r", "\n" };<br />
for (int i = 0; i < data->Length-5; i += 5)<br />
{<br />
fso->Write(data, i, 5);<br />
}<br />
<br />
fso->Close();<br />
FileInfo ^fi = gcnew FileInfo("file.dat");<br />
FileStream ^fsi = fi->OpenRead();<br />
int fileLength = (int)fi->Length;<br />
int b;<br />
while ((b = fsi->ReadByte()) != -1)<br />
{<br />
Console::Write((Char)b);<br />
}<br />
fsi->Position = 0;<br />
array<unsigned char>^ ca = gcnew array<unsigned char>(fileLength);<br />
fsi->Read(ca, 0, fileLength);<br />
for (int i = 0; i < ca->Length; i++)<br />
{<br />
Console::Write((Char)ca[i]);<br />
}<br />
fsi->Close();<br />
fi->Delete();<br />
}<br />
<br />
</source><br />
<br />
<br />
==Read byte from binary file==<br />
<br />
<br />
<br />
<source lang="csharp"> <br />
#include "stdafx.h"<br />
using namespace System;<br />
using namespace System::IO;<br />
void main()<br />
{<br />
FileStream ^fso = gcnew FileStream("file.dat", FileMode::Create,FileAccess::Write, FileShare::None);<br />
array<unsigned char>^ data = gcnew array<unsigned char> { "T", "h", "i","\r", "\n" };<br />
for (int i = 0; i < data->Length-5; i += 5)<br />
{<br />
fso->Write(data, i, 5);<br />
}<br />
<br />
fso->Close();<br />
FileInfo ^fi = gcnew FileInfo("file.dat");<br />
FileStream ^fsi = fi->OpenRead();<br />
int fileLength = (int)fi->Length;<br />
int b;<br />
while ((b = fsi->ReadByte()) != -1)<br />
{<br />
Console::Write((Char)b);<br />
}<br />
fsi->Position = 0;<br />
array<unsigned char>^ ca = gcnew array<unsigned char>(fileLength);<br />
fsi->Read(ca, 0, fileLength);<br />
for (int i = 0; i < ca->Length; i++)<br />
{<br />
Console::Write((Char)ca[i]);<br />
}<br />
fsi->Close();<br />
fi->Delete();<br />
}<br />
<br />
</source><br />
<br />
<br />
==Rewind by setting the binary file reading position==<br />
<br />
<br />
<br />
<source lang="csharp"> <br />
#include "stdafx.h"<br />
using namespace System;<br />
using namespace System::IO;<br />
void main()<br />
{<br />
FileStream ^fso = gcnew FileStream("file.dat", FileMode::Create,FileAccess::Write, FileShare::None);<br />
array<unsigned char>^ data = gcnew array<unsigned char> { "T", "h", "i","\r", "\n" };<br />
for (int i = 0; i < data->Length-5; i += 5)<br />
{<br />
fso->Write(data, i, 5);<br />
}<br />
<br />
fso->Close();<br />
FileInfo ^fi = gcnew FileInfo("file.dat");<br />
FileStream ^fsi = fi->OpenRead();<br />
int fileLength = (int)fi->Length;<br />
int b;<br />
while ((b = fsi->ReadByte()) != -1)<br />
{<br />
Console::Write((Char)b);<br />
}<br />
fsi->Position = 0;<br />
array<unsigned char>^ ca = gcnew array<unsigned char>(fileLength);<br />
fsi->Read(ca, 0, fileLength);<br />
for (int i = 0; i < ca->Length; i++)<br />
{<br />
Console::Write((Char)ca[i]);<br />
}<br />
fsi->Close();<br />
fi->Delete();<br />
}<br />
<br />
</source></div>
Admin