写日志追踪程序运行过程

using System;
using System.IO;
using System.Runtime.InteropServices;

namespace 超级DTU
{
class SystemFile
{
private static string m_fileName = AppDomain.CurrentDomain.BaseDirectory + "客户端.txt";
private const int FO_DELETE = 0x3;
private const ushort FOF_NOCONFIRMATION = 0x10;
private const ushort FOF_ALLOWUNDO = 0x40;

public static String FileName
{
get
{
return (m_fileName);
}
set
{
if (value != null || value != "")
{
m_fileName = value;
}
}
}

/// <summary>
/// 构造_SHFILEOPSTRUCT
/// </summary>
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public class _SHFILEOPSTRUCT
{
public IntPtr hwnd;
public UInt32 wFunc;
public string pFrom;
public string pTo;
public UInt16 fFlags;
public Int32 fAnyOperationsAborted;
public IntPtr hNameMappings;
public string lpszProgressTitle;
}

/// <summary>
/// 引入SHFileOperation
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
[DllImport("shell32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern int SHFileOperation([In, Out] _SHFILEOPSTRUCT str);

/// <summary>
/// 将文件删除进入回收站
/// </summary>
/// <param name="path">文件路径</param>
/// <returns>文件操作是否成功</returns>
public static int Delete(string path)
{
_SHFILEOPSTRUCT pm = new _SHFILEOPSTRUCT();
pm.wFunc = FO_DELETE;
pm.pFrom = path + '/0';
pm.pTo = null;
pm.fFlags = FOF_ALLOWUNDO | FOF_NOCONFIRMATION;
return SHFileOperation(pm);
}

/// <summary>
/// 记录日志至文本文件
/// </summary>
/// <param name="message">记录的内容</param>
public static void CreateErrorLog(string message)
{
try
{
if (File.Exists(m_fileName))
{
///如果日志文件已经存在，则直接写入日志文件
StreamWriter sr = File.AppendText(FileName);
sr.WriteLine(DateTime.Now.ToString() + " " + message);
sr.Close();
}
else
{
///创建日志文件
StreamWriter sr = File.CreateText(FileName);
sr.Close();
sr = File.AppendText(FileName);
sr.WriteLine(DateTime.Now.ToString() + " " + message);
sr.Close();
}
}
catch (Exception)
{

}
}
}
}