.NET Core 6.0发送邮件
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleAppNetworkTestAndToEmail
{
/// <summary>
/// 写本地日志。日志文件自动删除历史的，保留最近32个日志文件。
/// </summary>
public class LogHelpter
{
/// <summary>
/// 最多记录32个日志文件，其他的删除历史文件
/// </summary>
const int MAX_FILE_COUNT = 22;
/// <summary>
/// 文件保存的目录
/// </summary>
static string fileSaveDir = "";
/// <summary>
/// 限制文件生成大小，258000字节,大约253kb
/// </summary>
const long fileBytes = 258000;
private readonly static object lockObj = new object();
static LogHelpter()
{
//删除超过指定数量的历史文件
Task.Run(() =>
{
while (true)
{
try
{
//自动删除文件，
string[] filePathArr = System.IO.Directory.GetFileSystemEntries(fileSaveDir);
if (filePathArr == null || filePathArr.Length == 0)
{
goto DO_SELEEP;
}
List<FileInfo> files = new List<FileInfo>();
foreach (var item in filePathArr)
{
//("日志文件：" + item);
System.IO.FileInfo fileInfo = new System.IO.FileInfo(item);
files.Add(fileInfo);
}
var del_files = files.OrderByDescending(g => g.LastWriteTime).Skip(MAX_FILE_COUNT);
if (del_files == null || del_files.Count() == 0)
{
goto DO_SELEEP;
}
foreach (var file in del_files)
{
file.Delete();
}
}
catch (Exception ex)
{
Console.WriteLine("LogHelpter执行删除文件功能异常," + ex.Message);
}
DO_SELEEP:
System.Threading.Thread.Sleep(20000);
}
});
}
/// <summary>
/// fileFolderPath为文件保存目录
/// </summary>
/// <param name="fileFolderPath">文件保存目录</param>
/// <param name="fileNameNoExtension"></param>
/// <param name="fileNamePrefix">文件名前缀</param>
/// <returns></returns>
static string GetNewFileName(string fileFolderPath, string fileNameNoExtension, string fileNamePrefix = null)
{
string fileName = string.Empty;
//文件名前缀
fileNamePrefix = string.IsNullOrWhiteSpace(fileNamePrefix) ? "" : fileNamePrefix;
int index = 1;
if (fileNameNoExtension.LastIndexOf('_') == -1)
{
// fileName = (fileFolderPath, fileNamePrefix + ("yyyy-MM-dd") + "_" + index + ".log");
}
else
{
var arr = fileNameNoExtension.Split('_');
int.TryParse(arr[arr.Length - 1], out index);
if (index == 0 || index > 900)
{
index = 1;
}
}
fileName = Path.Combine(fileFolderPath, fileNamePrefix + DateTime.Now.ToString("yyyy-MM-dd") + "_" + index + ".log");
while (File.Exists(fileName))
{
if (File.ReadAllBytes(fileName).Length < fileBytes)
{
break;
}
index++;
fileName = Path.Combine(fileFolderPath, fileNamePrefix + DateTime.Now.ToString("yyyy-MM-dd") + "_" + index + ".log");
}
return fileName;
}
const string saveFolder = "log";//日志文件保存根路径
/// <summary>
/// 日志记录，在程序执行的根目录，写入txt文件，文件固定大小，超过限定大小自动创建新日志文件
/// </summary>
/// <param name="msg">记录内容</param>
/// <param name="storeDir">文件保存文件夹</param>
/// <param name="fileNamePrefix">文件名前缀_</param>
/// <returns></returns>
public static void AddLog(string msg, string storeDir = null, string fileNamePrefix = null)
{
Console.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:") + "> " + msg);
lock (lockObj)
{
try
{
//文件名前缀
fileNamePrefix = string.IsNullOrWhiteSpace(fileNamePrefix) ? "" : fileNamePrefix + "_";
string fileFolderPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, saveFolder);
if (!string.IsNullOrWhiteSpace(storeDir))
{
fileFolderPath = Path.Combine(fileFolderPath, storeDir);
}
if (Directory.Exists(fileFolderPath) == false)
{
Directory.CreateDirectory(fileFolderPath);
}
fileSaveDir = fileFolderPath;
string fileName = string.Empty;
string[] files = Directory.GetFiles(fileFolderPath);
if (files.Length == 0)
{
fileName = Path.Combine(fileFolderPath, fileNamePrefix + DateTime.Now.ToString("yyyy-MM-dd") + "_1.log");
goto DO_WRITE;
}
//string[] files2 = (x => x).ToArray();
string[] files2 = files.OrderByDescending(x => int.Parse(x.Substring(x.LastIndexOf("_")).Split("_")[1].Split(".")[0])).ToArray();
FileInfo fileInfo = new FileInfo(files2[0]);
string fileNameNoExtension = Path.GetFileNameWithoutExtension(fileInfo.Name);
fileName = GetNewFileName(fileFolderPath, fileNameNoExtension, fileNamePrefix);
DO_WRITE:
FileStream fs = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.Write);
string msg2 = DateTime.Now.ToString("yyyy-MM-dd HH:mm:") + ">" + msg + System.Environment.NewLine;
byte[] logBytes = UTF8Encoding.UTF8.GetBytes(msg2);
fs.Write(logBytes, 0, logBytes.Length);
fs.Flush();
fs.Close();
fs.Dispose();
// tishiMsg = "写入日志成功";
}
catch (Exception ex)
{
Console.WriteLine("LogHelpter日志写入异常：" + ex.ToString());
}
}
}
}
}