自己整理了一个简单写日志的类，方便以后再次用到。
说明：CS程序，程序启动目录下，自动创建Log目录，写日志。日志按天记录，每天的日志作为一个txt文件保存。
/// <summary>
/// 日志管理功能
/// //以天建立日志文件，
/// </summary>
public class LogManager
{
private static string LogDirectory = Application.StartupPath + @"\Log\";
/// <summary>
/// 保存的最多日志数量
/// </summary>
private static int MaxLogCount = 365;
public static void Write(string msg)
{
try
{
DeleteLog();
if (!System.IO.Directory.Exists(LogDirectory))
{
System.IO.Directory.CreateDirectory(LogDirectory);
}
string name = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString().PadLeft(2, '0') + DateTime.Now.Day.ToString().PadLeft(2, '0');
string datapath = LogDirectory + name + ".txt";
if (System.IO.File.Exists(datapath))//追加
{
using (FileStream fs = new FileStream(datapath, FileMode.Append))
{
using (StreamWriter sw = new StreamWriter(fs))
{
//开始写入
sw.WriteLine("\n");
sw.WriteLine("当前时间：" + DateTime.Now.ToString());
sw.WriteLine("日志信息：" + msg);
//清空缓冲区
sw.Flush();
//关闭流
sw.Close();
fs.Close();
}
}
}
else//创建
{
using (FileStream fs = new FileStream(datapath, FileMode.Create))
{
using (StreamWriter sw = new StreamWriter(fs))
{
//开始写入
sw.WriteLine("当前时间：" + DateTime.Now.ToString());
sw.WriteLine("日志信息：" + msg);
//清空缓冲区
sw.Flush();
//关闭流
sw.Close();
fs.Close();
}
}
}
}
catch
{
}
}
public static void Write(Exception ex)
{
try
{
DeleteLog();
if (!System.IO.Directory.Exists(LogDirectory))
{
System.IO.Directory.CreateDirectory(LogDirectory);
}
string name = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString().PadLeft(2, '0') + DateTime.Now.Day.ToString().PadLeft(2, '0');
string datapath = LogDirectory + name + ".txt";//文件名格式为：20170606.txt
if (System.IO.File.Exists(datapath))//追加
{
using (FileStream fs = new FileStream(datapath, FileMode.Append))
{
using (StreamWriter sw = new StreamWriter(fs))
{ //开始写入
sw.WriteLine("\n");
sw.WriteLine("当前时间：" + DateTime.Now.ToString());
sw.WriteLine("异常信息：" + ex.Message);
sw.WriteLine("异常对象：" + ex.Source);
sw.WriteLine("调用堆栈：" + ex.StackTrace);
sw.WriteLine("触发方法：" + ex.TargetSite);
//清空缓冲区
sw.Flush();
//关闭流
sw.Close();
fs.Close();
}
}
}
else//创建
{
using (FileStream fs = new FileStream(datapath, FileMode.Create))
{
using (StreamWriter sw = new StreamWriter(fs))
{
//开始写入
sw.WriteLine("当前时间：" + DateTime.Now.ToString());
sw.WriteLine("异常信息：" + ex.Message);
sw.WriteLine("异常对象：" + ex.Source);
sw.WriteLine("调用堆栈：" + ex.StackTrace);
sw.WriteLine("触发方法：" + ex.TargetSite);
//清空缓冲区
sw.Flush();
//关闭流
sw.Close();
fs.Close();
}
}
}
}
catch
{
}
}
/// <summary>
/// 删除日志
/// </summary>
private static void DeleteLog()
{
DirectoryInfo dic = new DirectoryInfo(LogDirectory);
//不必每天都删除日志，整10天删除
if (!(DateTime.Now.Day % 10 == 0))
{
return;
}
if (dic.Exists)
{
var files = dic.GetFiles();
if (files.Length < MaxLogCount)
return;
List<int> names = new List<int>();
for (int i = 0; i < files.Length; i++)
{
string strname = Path.GetFileNameWithoutExtension(files[i].Name);
int name;
if (int.TryParse(strname, out name))
{
names.Add(name);
}
}
names.Sort();//升序
//names.Reverse();//降序
for (int i = 0; i < names.Count - MaxLogCount; i++)
{
string path = System.IO.Path.Combine(LogDirectory, names[i].ToString() + ".txt");
File.Delete(path);
}
}
}
}