/// <summary>初始化日志记录文件</summary>
private StreamWriter InitLog()
{
var path = LogPath.EnsureDirectory(false);
StreamWriter writer = null;
var logfile = LogFile;
if (!String.IsNullOrEmpty(logfile))
{
try
{
var stream = new FileStream(logfile, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
writer = new StreamWriter(stream, Encoding.UTF8)
{
AutoFlush = true
};
}
catch { }
}
if (writer == null)
{
logfile = Path.Combine(path, FileFormat.F(DateTime.Now));
var ext = Path.GetExtension(logfile);
var i = 0;
while (i < 10)
{
try
{
var stream = new FileStream(logfile, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
writer = new StreamWriter(stream, Encoding.UTF8)
{
AutoFlush = true
};
break;
}
catch
{
if (logfile.EndsWith("_" + i + ext))
{
logfile = logfile.Replace("_" + i + ext, "_" + (++i) + ext);
}
else
{
logfile = logfile.Replace(ext, "_0" + ext);
}
}
}
}
if (writer == null)
{
throw new XException("无法写入日志！");
}
// 这里赋值，会导致log文件名不会随时间而自动改变
//LogFile = logfile;
if (!isFirst)
{
isFirst = true;
// 通过判断LogWriter.BaseStream.Length，解决有时候日志文件为空但仍然加空行的问题
//if (File.Exists(logfile) && LogWriter.BaseStream.Length > 0) LogWriter.WriteLine();
// 因为指定了编码，比如UTF8，开头就会写入3个字节，所以这里不能拿长度跟0比较
if (writer.BaseStream.Length > 10)
{
writer.WriteLine();
}
//WriteHead(writer);
writer.Write(GetHead());
}
return(LogWriter = writer);
}
