解析StreamReader与文件乱码问题的解决方法
public static Encoding GetEncoding(string filePath)
{
if (filePath == null)
{
throw new ArgumentNullException("filePath");
}
Encoding encoding1 = Encoding.Default;
if (File.Exists(filePath))
{
try
{
using (FileStream stream1 = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
if (stream1.Length > 0)
{
using (StreamReader reader1 = new StreamReader(stream1, true))
{
char[] chArray1 = new char[1];
reader1.Read(chArray1, 0, 1);
encoding1 = reader1.CurrentEncoding;
reader1.BaseStream.Position = 0;
if (encoding1 == Encoding.UTF8)
{
byte[] buffer1 = encoding1.GetPreamble();
if (stream1.Length >= buffer1.Length)
{
byte[] buffer2 = new byte[buffer1.Length];
stream1.Read(buffer2, 0, buffer2.Length);
for (int num1 = 0; num1 < buffer2.Length; num1++)
{
if (buffer2[num1] != buffer1[num1])
{
encoding1 = Encoding.Default;
break;
}
}
}
else
{
encoding1 = Encoding.Default;
}
}
}
}
}
}
catch (Exception exception1)
{
throw;
}
if (encoding1 == null)
{
encoding1 = Encoding.UTF8;
}
}
return encoding1;
}