internal static string BytesToText(byte[] buff, Encoding encoding)
{
if (buff.Length == 0)
{
return("");
}
TextEncodingDetect detect = new TextEncodingDetect();
encoding = detect.GetEncoding(buff, encoding);
if (detect.hasBom)
{
if (encoding == Encoding.UTF8)
{
return(encoding.GetString(buff, 3, buff.Length - 3));
}
if (encoding == Encoding.Unicode || encoding == Encoding.BigEndianUnicode)
{
return(encoding.GetString(buff, 2, buff.Length - 2));
}
if (encoding == Encoding.UTF32)
{
return(encoding.GetString(buff, 4, buff.Length - 4));
}
}
return(encoding.GetString(buff));
}
internal static bool Save(string fileName, string text, bool isAppend, bool writeLogOnError, Encoding encode)
{
try
{
//System.Text.Encoding.UTF8
string folder = Path.GetDirectoryName(fileName);
if (!Directory.Exists(folder))
{
Directory.CreateDirectory(folder);
}
string key = "IOHelper_Save_" + fileName.GetHashCode();
if (cache.Contains(key))
{
encode = cache.Get <Encoding>(key);
}
else if (File.Exists(fileName))
{
TextEncodingDetect detect = new TextEncodingDetect();
Encoding detectEncode = detect.GetEncoding(File.ReadAllBytes(fileName), encode);
if (detectEncode != Encoding.ASCII)
{
encode = detectEncode;
}
cache.Set(key, encode, 60);
}
lock (GetLockObj(fileName.Length))
{
using (StreamWriter writer = new StreamWriter(fileName, isAppend, encode))
{
writer.Write(text);
}
}
return(true);
}
catch (Exception err)
{
if (writeLogOnError)
{
Log.WriteLogToTxt(err);
}
else
{
Error.Throw("IOHelper.Save() : " + err.Message);
}
}
return(false);
}
internal static bool Save(string fileName, string text, bool isAppend, bool writeLogOnError, Encoding encode, int tryCount)
{
try
{
//System.Text.Encoding.UTF8
string folder = Path.GetDirectoryName(fileName);
if (!Directory.Exists(folder))
{
Directory.CreateDirectory(folder);
}
string key = "IOHelper_Save_" + fileName.GetHashCode();
if (cache.Contains(key))
{
encode = cache.Get <Encoding>(key);
}
else if (File.Exists(fileName))
{
TextEncodingDetect detect = new TextEncodingDetect();
Encoding detectEncode = detect.GetEncoding(File.ReadAllBytes(fileName), encode);
if (detectEncode != Encoding.ASCII)
{
encode = detectEncode;
}
cache.Set(key, encode, 60);
}
lock (GetLockObj(fileName.Length))
{
try
{
using (StreamWriter writer = new StreamWriter(fileName, isAppend, encode))
{
if (!isAppend && fileName.EndsWith(".txt"))
{
//写入bom头
}
writer.Write(text);
}
}
catch (Exception err)
{
if (tryCount > 0)
{
tryCount--;
Thread.Sleep(500 + (3 - tryCount) * 500);
Save(fileName, text, isAppend, writeLogOnError, encode, tryCount);
}
else
{
Error.Throw(err.Message);
}
}
}
return(true);
}
catch (Exception err)
{
if (tryCount == 3) // 避免死循环。
{
if (writeLogOnError)
{
Log.Write(err, LogType.Error);
}
else
{
Error.Throw("IOHelper.Save() : " + err.Message);
}
}
}
return(false);
}