写入日志到txt文件

//写入日志(简洁版)

public static void AddLogByTxt(string log)
{
string logName = DateTime.Now.ToString() + "log.txt";
string path = AppDomain.CurrentDomain.BaseDirectory + logName;
if (!System.IO.File.Exists(path))
{
FileStream stream = System.IO.File.Create(path);
stream.Close();
stream.Dispose();
}
using (StreamWriter writer = new StreamWriter(path, true))
{
writer.WriteLine(log);
}
}

//带自动删除版（大小 ）

public static void AddLogCanDelete(string log)
{
try
{
string path = AppDomain.CurrentDomain.BaseDirectory + "log.txt";
if (!System.IO.File.Exists(path))
{
FileStream stream = System.IO.File.Create(path);
stream.Close();
stream.Dispose();
}

//写入日志
using (StreamWriter writer = new StreamWriter(path, true))
{
writer.WriteLine(log);
}

long size = 0;

//获取文件大小
using (FileStream file = System.IO.File.OpenRead(path))
{
size = file.Length;//文件大小。byte
}

//判断日志文件大于2M，自动删除。
if (size > (1024 * 4 * 512))
{
System.IO.File.Delete(path);
}
}
catch
{

}
}

//带自动删除版（时间 ）

public static void AddLogCanDelete(string log)
{
try
{
string path = AppDomain.CurrentDomain.BaseDirectory + "log.txt";
if (!System.IO.File.Exists(path))
{
FileStream stream = System.IO.File.Create(path);
stream.Close();
stream.Dispose();
}

//写入日志
using (StreamWriter writer = new StreamWriter(path, true))
{
writer.WriteLine(log);
}

DateTime createTime = DateTime.MinValue;
//获取创建时间
FileInfo file = new FileInfo(path);
createTime= file.CreationTime;

//判断日志文件创建日期是否超过一个月，自动删除。
if (createTime > DateTime.Now.AddMonths(-1))
{
System.IO.File.Delete(path);
}
}
catch
{

}
}

备注：
System.AppDomain.CurrentDomain.BaseDirectory // 获取程序的基目录

System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName // 获取模块的完整路径。