asp.net core 下载文件,上传excel文件

2019-12-06 22:28栏目:bob体育平台
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100多行代码实现6秒完成50万条多线程并发日志文件写入,50万日志文件

100多行代码实现6秒完成50万条多线程并发日志文件写入,支持日志文件分隔

日志工具类代码:

图片 1using System; using System.Collections.Concurrent; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; namespace Utils { /// <summary> /// 写日志类 /// </summary> public class LogUtil { #region 字段 public static object _lock = new object(); public static string path = "D:\log"; public static int fileSize = 10 * 1024 * 1024; //日志分隔文件大小 private static ConcurrentQueue<Tuple<string, string>> msgQueue = new ConcurrentQueue<Tuple<string, string>>(); #endregion #region 静态构造函数 static LogUtil() { Thread thread = new Thread(new ThreadStart(() => { try { int i; List<string> list; Tuple<string, string> tuple; while (true) { i = 0; list = new List<string>(); while (msgQueue.TryDequeue(out tuple) && i++ < 10000) { list.Add(tuple.Item1.PadLeft(8) + tuple.Item2); } if (list.Count > 0) { WriteFile(list, CreateLogPath()); } Thread.Sleep(1); } } catch { } })); thread.IsBackground = true; thread.Start(); } #endregion #region 写文件 /// <summary> /// 写文件 /// </summary> public static void WriteFile(List<string> list, string path) { try { if (!Directory.Exists(Path.GetDirectoryName(path))) { Directory.CreateDirectory(Path.GetDirectoryName(path)); } if (!File.Exists(path)) { using (FileStream fs = new FileStream(path, FileMode.Create)) { fs.Close(); } } using (FileStream fs = new FileStream(path, FileMode.Append, FileAccess.Write)) { using (StreamWriter sw = new StreamWriter(fs)) { list.ForEach(item => { #region 日志内容 string value = string.Format(@"{0} {1}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"), item); #endregion sw.WriteLine(value); }); sw.Flush(); } fs.Close(); } } catch { } } #endregion #region 生成日志文件路径 /// <summary> /// 生成日志文件路径 /// </summary> public static string CreateLogPath() { int index = 0; string logPath; bool bl = true; do { index++; logPath = Path.Combine(path, "Log" + DateTime.Now.ToString("yyyyMMdd") + (index == 1 ? "" : "_" + index.ToString()) + ".txt"); if (File.Exists(logPath)) { FileInfo fileInfo = new FileInfo(logPath); if (fileInfo.Length < fileSize) { bl = false; } } else { bl = false; } } while (bl); return logPath; } #endregion #region 写错误日志 /// <summary> /// 写错误日志 /// </summary> public static void LogError(string log) { msgQueue.Enqueue(new Tuple<string, string>("[Error] ", log)); } #endregion #region 写操作日志 /// <summary> /// 写操作日志 /// </summary> public static void Log(string log) { msgQueue.Enqueue(new Tuple<string, string>("[Info] ", log)); } #endregion } } View Code

测试代码:

图片 2using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; using System.Windows.Forms; using Utils; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { LogUtil.path = Application.StartupPath + "\log"; //初始化日志路径 } private void button1_Click(object sender, EventArgs e) { for (int n = 0; n < 10; n++) { Thread thread = new Thread(new ThreadStart(() => { int i = 0; for (int k = 0; k < 50000; k++) { LogUtil.Log((i++).ToString() + " abcdab[email protected]#$%^&dabcdabcdabcdabcdabcdabcdabcdabcd"); } })); thread.IsBackground = true; thread.Start(); } } } } View Code

 测试截图:

图片 3

图片 4

 

100多行代码实现6秒完成50万条多线程并发日志文件写入,支持日志文...

C#写文本日志帮助类(支持多线程)改进版(不适用于ASP.NET程序),

由于iis的自动回收机制,不适用于ASP.NET程序

代码:

图片 5using System; using System.Collections.Concurrent; using System.Configuration; using System.IO; using System.Text; using System.Threading; using System.Threading.Tasks; namespace CommonDll { /// <summary> /// 写日志类 /// </summary> public class LogUtil { #region 字段 public static string path = ConfigurationManager.AppSettings["LogPath"]; public static int fileSize = 10 * 1024 * 1024; //日志分隔文件大小 private static ConcurrentQueue<Tuple<string, DateTime>> queue = new ConcurrentQueue<Tuple<string, DateTime>>(); #endregion #region 构造函数 static LogUtil() { Task.Factory.StartNew(new Action(delegate() { StringBuilder log; string path; Tuple<string, DateTime> tuple; string item; while (true) { log = new StringBuilder(); path = CreateLogPath(); while (queue.TryDequeue(out tuple)) { item = string.Format(@"{0} {1}", tuple.Item2.ToString("yyyy-MM-dd HH:mm:ss.fff"), tuple.Item1); log.AppendFormat("rn{0}", item); } if (log.Length > 0) WriteFile(log.ToString(2, log.Length - 2), path); Thread.Sleep(100); } })); } #endregion #region 写文件 /// <summary> /// 写文件 /// </summary> public static void WriteFile(string log, string path) { try { if (!Directory.Exists(Path.GetDirectoryName(path))) { Directory.CreateDirectory(Path.GetDirectoryName(path)); } if (!File.Exists(path)) { using (FileStream fs = new FileStream(path, FileMode.Create)) { fs.Close(); } } using (FileStream fs = new FileStream(path, FileMode.Append, FileAccess.Write)) { using (StreamWriter sw = new StreamWriter(fs)) { sw.WriteLine(log); sw.Flush(); } fs.Close(); } } catch { } } #endregion #region 生成日志文件路径 /// <summary> /// 生成日志文件路径 /// </summary> public static string CreateLogPath() { int index = 0; string logPath; bool bl = true; do { index++; logPath = Path.Combine(path, "Log" + DateTime.Now.ToString("yyyyMMdd") + (index == 1 ? "" : "_" + index.ToString()) + ".txt"); if (File.Exists(logPath)) { FileInfo fileInfo = new FileInfo(logPath); if (fileInfo.Length < fileSize) { bl = false; } } else { bl = false; } } while (bl); return logPath; } #endregion #region 写错误日志 /// <summary> /// 写错误日志 /// </summary> public static void LogError(string log) { queue.Enqueue(new Tuple<string, DateTime>("[Error] " + log, DateTime.Now)); } #endregion #region 写操作日志 /// <summary> /// 写操作日志 /// </summary> public static void Log(string log) { queue.Enqueue(new Tuple<string, DateTime>("[Info] " + log, DateTime.Now)); } #endregion } } View Code

测试代码:

图片 6private void button1_Click(object sender, EventArgs e) { int n = 10000; DateTime dtStart = DateTime.Now; for (int i = 1; i <= n; i++) { ThreadPool.QueueUserWorkItem(new WaitCallback(delegate(object obj) { int j = (int)obj; LogUtil.Log("测试" + j.ToString("00000")); if (j == n) { double sec = DateTime.Now.Subtract(dtStart).TotalSeconds; MessageBox.Show(n + "条日志完成,耗时" + sec.ToString("0.000") + "秒"); } }), i); } } View Code

效果图:

图片 7

 

由于iis的自动回收机制,不适用于ASP.NET程序 代码: using System; using System.C...

代码:

后端代码:

public IActionResult DownloadFile()
{
var FilePath = @"./files/deparment.xlsx";
var stream = System.IO.File.OpenRead(FilePath);
return File(stream, "application/vnd.android.package-archive", Path.GetFileName(FilePath));
}

页面代码:

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