C# 常用公共方法
2021/6/22 12:56:45
本文主要是介绍C# 常用公共方法,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
1、文件大小单位格式
/// <summary> /// 文件大小单位格式(GB/MB/KB/B) /// </summary> /// <param name="b"></param> /// <returns></returns> public static string FileUnitToString(long b) { const double GB = 1024 * 1024 * 1024; const double MB = 1024 * 1024; const double KB = 1024; if (b / GB >= 1) { return Math.Round(b / (double)GB, 1) + "GB"; } if (b / MB >= 1) { return Math.Round(b / (double)MB, 1) + "MB"; } if (b / KB >= 1) { return Math.Round(b / (double)KB, 1) + "KB"; } return b + "B"; }
2、获取客户端的IP地址
/// <summary> /// 获取客户端的IP地址 /// </summary> /// <returns>客户端IP地址</returns> public static string Get_ClientIP() { string result = string.Empty; result = HttpContext.Current.Request.Headers["X-Real-IP"]; //Nginx 为前端时获取IP地址的方法 if (result != null) return result; if (HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"] != null)//发出请求的远程主机的IP地址 { result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString(); } else if (HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)//判断是否设置代理,若使用了代理 { if (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)//获取代理服务器的IP { result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString(); } else { result = HttpContext.Current.Request.UserHostAddress; } } else { result = HttpContext.Current.Request.UserHostAddress; } if (result == "::1") result = string.Empty; return result; }
3、日志操作
public static void WriteErorrLog(Exception ex, string message = "") { if (ex == null) return; //ex = null 返回 DateTime dt = DateTime.Now; // 设置日志时间 string time = dt.ToString("yyyy-MM-dd HH:mm:ss"); //年-月-日 时:分:秒 string logName = dt.ToString("yyyy-MM-dd"); //日志名称 string logPath = System.AppDomain.CurrentDomain.BaseDirectory; //日志存放路径 string log = Path.Combine(Path.Combine(logPath, "log"), string.Format("{0}.log", logName)); //路径 + 名称 try { FileInfo info = new FileInfo(log); if (info.Directory != null && !info.Directory.Exists) { info.Directory.Create(); } using (StreamWriter write = new StreamWriter(log, true, Encoding.GetEncoding("utf-8"))) { write.WriteLine(time); write.WriteLine(ex.Message); write.WriteLine("异常信息:" + ex); write.WriteLine("异常堆栈:" + ex.StackTrace); write.WriteLine("异常简述:" + message); write.WriteLine("\r\n----------------------------------\r\n"); write.Flush(); write.Close(); write.Dispose(); } } catch { } }
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