求一种方法来判断文件的encoding....

[real3000]

现有N多TXT文件，比如1.txt, 2.txt, 3.txt, 4.txt.....

编码方式为ANSI、UTF-8 或 UTF-16，

我想知道每个文件的编码方式是什么，

现在的方法是记事本打开文件，然后选择“另存为”....

求一种方法，可以判断出文件的encoding,

在线急求，

先谢谢了

[real3000]

CupTea(一杯清茶) 的方法中，reader 的 currentEncoding 总是uft8，也就是默认的encoding...

还是孟子老大的方法比较强；

另外，感谢孟子老大出山，给足了小弟面子^_^

[ParadiseX]

签名， 这个我也关注

[一杯清茶Kevin]

The following code example gets the encoding of the specified StreamReader object.

using System;
using System.IO;
using System.Text;

class Test
{

public static void Main()
{
string path = @"c:\temp\MyTest.txt";

try
{
if (File.Exists(path))
{
File.Delete(path);
}

//Use an encoding other than the default (UTF8).
using (StreamWriter sw = new StreamWriter(path, false, new UnicodeEncoding()))
{
sw.WriteLine("This");
sw.WriteLine("is some text");
sw.WriteLine("to test");
sw.WriteLine("Reading");
}

using (StreamReader sr = new StreamReader(path, true))
{
while (sr.Peek() >= 0)
{
Console.Write((char)sr.Read());
}

//Test for the encoding after reading, or at least
//after the first read.
Console.WriteLine("The encoding used was {0}.", sr.CurrentEncoding);
Console.WriteLine();
}
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}

[孟子E章]

这个可以

static Encoding GetEncoding(string filepath)
{
Encoding result = null;
FileStream file = null;
try
{
file = new FileStream(filepath, FileMode.Open, FileAccess.Read, FileShare.Read);

if (file.CanSeek)
{
// get the bom, if there is one
byte[] bom = new byte[4];
file.Read(bom, 0, 4);

// utf-8
if (bom[0] == 0xef && bom[1] == 0xbb && bom[2] == 0xbf)
result = System.Text.Encoding.UTF8;
// ucs-2le, ucs-4le, ucs-16le, utf-16, ucs-2, ucs-4
else if ((bom[0] == 0xff && bom[1] == 0xfe) ||
(bom[0] == 0xfe && bom[1] == 0xff) ||
(bom[0] == 0 && bom[1] == 0 && bom[2] == 0xfe && bom[3] == 0xff))
result = System.Text.Encoding.Unicode;
// else ascii
else
result = System.Text.Encoding.ASCII;
}
else
{
// can't detect, set to default
result = System.Text.Encoding.ASCII;
}

return result;
}
finally
{
if (null != file) file.Close();
}
}

}

[bobo0124]

mark

[孟子E章]

static Encoding GetEncoding(string filepath)
{
Encoding result = null;
FileStream file = null;
try
{
file = new FileStream(filepath, FileMode.Open, FileAccess.Read, FileShare.Read);

if (file.CanSeek)
{
// get the bom, if there is one
byte[] bom = new byte[4];
file.Read(bom, 0, 4);

// utf-8
if (bom[0] == 0xef && bom[1] == 0xbb && bom[2] == 0xbf)
result = System.Text.Encoding.UTF8;
// ucs-2le, ucs-4le, ucs-16le, utf-16, ucs-2, ucs-4
else if ((bom[0] == 0xff && bom[1] == 0xfe) ||
(bom[0] == 0xfe && bom[1] == 0xff) ||
(bom[0] == 0 && bom[1] == 0 && bom[2] == 0xfe && bom[3] == 0xff))
result = System.Text.Encoding.Unicode;
// else ascii
else
result = System.Text.Encoding.ASCII;
}
else
{
// can't detect, set to default
result = System.Text.Encoding.ASCII;
}

return result;
}
finally
{
if (null != file) file.Close();
}
}

}

[fencole]

mark,孟老大出山，我只有顶，jf

[ParadiseX]

大老孟的方法果然不错，要对编码结构比较精通才能做出来呀。

[shalen520]

mark

[fd7893]

mark