c# 程序异常点监控

1. 添加loghelp类

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;

namespace XlsRecoder
{
	public class LogHelper
	{
		private static object logLock = new object();

		private static DateTime curDate = DateTime.MinValue;

		public static void LogRetainDays(int days)
		{
			ThreadPool.QueueUserWorkItem(delegate
			{
				if (days >= 0)
				{
					DateTime now = DateTime.Now;
					if (now.Subtract(curDate).TotalDays != 0.0)
					{
						curDate = now;
						string text = "LOG";
						string text2 = text + "\\" + DateTime.Now.ToString("yyyy-MM-dd");
						DateTime dateTime = now.AddDays(-days);
						if (Directory.Exists(text))
						{
							if (!Directory.Exists(text2))
							{
								Directory.CreateDirectory(text2);
							}
							lock (logLock)
							{
								try
								{
									string[] directories = Directory.GetDirectories(text, "????-??-??");
									if (directories != null && directories.Length != 0)
									{
										for (int i = 0; i < directories.Length; i++)
										{
											DateTime value = Convert.ToDateTime(directories[i].Replace(text + "\\", ""));
											if (dateTime.Subtract(value).TotalDays >= 0.0)
											{
												File.Delete(directories[i]);
											}
										}
									}
									return;
								}
								catch (Exception ex)
								{
									if (!File.Exists(text2 + "\\LogError.log"))
									{
										File.Create(text2 + "\\LogError.log").Dispose();
									}
									File.AppendAllLines(text2 + "\\LogError.log", new List<string> { DateTime.Now.ToString("MM-dd hh:mm:ss fff] ") + "error:" + ex.Message });
									return;
								}
							}
						}
						Directory.CreateDirectory(text2);
					}
				}
			});
		}

		public static void LogMessage(string fileName, string message)
		{
			ThreadPool.QueueUserWorkItem(delegate
			{
				string text = "LOG\\" + DateTime.Now.ToString("yyyy-MM-dd");
				string path = text + "\\" + fileName;
				lock (logLock)
				{
					try
					{
						if (!Directory.Exists(text))
						{
							Directory.CreateDirectory(text);
						}
						if (!File.Exists(path))
						{
							File.Create(path).Dispose();
						}
						File.AppendAllLines(path, new List<string> { DateTime.Now.ToString("MM-dd hh:mm:ss fff] ") + message });
					}
					catch (Exception ex)
					{
						if (!File.Exists(text + "\\LogError.log"))
						{
							File.Create(text + "\\LogError.log").Dispose();
						}
						File.AppendAllLines(text + "\\LogError.log", new List<string> { DateTime.Now.ToString("MM-dd hh:mm:ss fff] ") + "error:" + ex.Message });
					}
				}
			});
		}
	}
}

2. try... catch...方式进行捕捉异常，并打印到日志中

catch (Exception ex)
{
    string str = ex.StackTrace;
    LogHelper.LogMessage("LogRun.log", "异常" + str);
}