String字符串工具类

字符串类(StringUtil.cs)

 using System;

 namespace Sam.OA.Common
 {
     /// <summary>
     /// 字符处理工具类
     /// 作者：陈彦斌
     /// 更新时间：2019年9月11日00:07:11
     /// </summary>
     [Serializable]
     public static class StringUtil
     {
         /// <summary>
         /// 判断字符对象为null或者为""
         /// </summary>
         /// <param name="obj">字符对象</param>
         /// <returns></returns>
         public static bool isNullOrBlank(Object obj)
         {
             if (obj == null || obj.ToString().ToLower() == "null" || obj == DBNull.Value || obj.ToString().Trim() == "" || obj.ToString() == "undefined" || obj.ToString().Equals(decimal.MinValue.ToString()))
                 return true;
             else
                 return false;
         }
         /// <summary>
         /// 处理字符串
         /// </summary>
         /// <param name="obj">字符串</param>
         /// <returns></returns>
         public static string ProcessString(object obj)
         {
             return isNullOrBlank(obj) ? "null" : "'" + obj.ToString().Replace("--", "") + "'";
         }
         /// <summary>
         /// 判断字符串是否为日期
         /// </summary>
         /// <param name="strDate">日期字符串</param>
         /// <returns></returns>
         public static bool ObjectIsDate(object strDate)
         {
             try
             {
                 DateTime.Parse(ProcessString(strDate));
                 return true;
             }
             catch
             {
                 return false;
             }
         }
         /// <summary>
         /// 判断字符串是否为decimal
         /// </summary>
         /// <param name="obj"></param>
         /// <returns></returns>
         public static bool IsDecimal(object obj)
         {
             try
             {
                 decimal.Parse(obj.ToString().Trim());
                 return true;
             }
             catch
             {
                 return false;
             }
         }
         /// <summary>
         /// 对象是否为Null并返回三元运算符值
         /// </summary>
         /// <param name="obj">对象</param>
         /// <returns></returns>
         public static string ObjectIsNull(string obj)
         {
             try
             {
                 return obj == null ? "" : obj.Replace(" ", "");
             }
             catch (Exception ex)
             {
                 return "";
             }
         }
         /// <summary>
         /// 对象是否为空并返回三元运算符值
         /// </summary>
         /// <param name="obj">对象</param>
         /// <returns></returns>
         public static string ObjectIsBlank(string obj)
         {
             try
             {
                 return obj.Replace(" ", "") == "" ? "" : obj.Replace(" ", "");
             }
             catch (Exception ex)
             {
                 return "";
             }
         }
         /// <summary>
         /// 对象是否为Decimal并返回三元运算符值
         /// </summary>
         /// <param name="obj">对象</param>
         /// <returns></returns>
         public static decimal ObjectIsDecimal(object obj)
         {
             try
             {
                 return Convert.ToDecimal(obj.ToString().Replace(" ", "") == "" ? "" : obj);
             }
             catch (Exception ex)
             {
                 return ;
             }
         }
         /// <summary>
         /// 获取当前月的第一天
         /// </summary>
         /// <returns></returns>
         public static DateTime GetFirstDayCurrentMonth()
         {
             try
             {
                 return DateTime.Now.AddDays( - DateTime.Now.Day).Date;
             }
             catch (Exception ex)
             {
                 throw ex;
             }
         }
         /// <summary>
         /// 获取当前月的最后一天
         /// </summary>
         /// <returns></returns>
         public static DateTime GetLastDayCurrentMonth()
         {
             try
             {
                 return DateTime.Now.AddDays(-DateTime.Now.Day).Date.AddMonths();
             }
             catch (Exception ex)
             {
                 throw ex;
             }
         }
         /// <summary>
         /// 获取指定日期，在为一年中为第几周
         /// </summary>
         /// <param name="dtWeek">指定时间</param>
         /// <reutrn>返回第几周,1-52周</reutrn>
         private static int GetWeekOfYear(DateTime dtWeek)
         {
             System.Globalization.GregorianCalendar gc = new System.Globalization.GregorianCalendar();
             int weekOfYear = gc.GetWeekOfYear(dtWeek, System.Globalization.CalendarWeekRule.FirstDay, DayOfWeek.Monday);
             return weekOfYear;
         }
         /// <summary>
         /// 计算某日起始日期（礼拜一的日期）
         /// </summary>
         /// <param name="someDate">该周中任意一天</param>
         /// <returns>返回礼拜一日期，无时分秒</returns>
         public static string GetMondayDate(DateTime someDate)
         {
             int i = someDate.DayOfWeek - DayOfWeek.Monday;
             if (i == -) i = ;// i值 > = 0 ，因为枚举原因，Sunday排在最前，此时Sunday-Monday=-1，必须+7=6。
             TimeSpan ts = new TimeSpan(i, , , );
             return someDate.Subtract(ts).ToShortDateString();
         }
         /// <summary>
         /// 计算某日结束日期（礼拜日的日期）
         /// </summary>
         /// <param name="someDate">该周中任意一天</param>
         /// <returns>返回礼拜日日期，无时分秒</returns>
         public static string GetSundayDate(DateTime someDate)
         {
             int i = someDate.DayOfWeek - DayOfWeek.Sunday;
             if (i != ) i =  - i;// 因为枚举原因，Sunday排在最前，相减间隔要被7减。
             TimeSpan ts = new TimeSpan(i, , , );
             return someDate.Add(ts).ToShortDateString();
         }
         /// <summary>
         /// 获取某月的天数
         /// </summary>
         /// <param name="someDate">日期</param>
         /// <returns>当月的天数</returns>
         public static int GetDaysInMonth(DateTime someDate)
         {
             return System.Threading.Thread.CurrentThread.CurrentUICulture.Calendar.GetDaysInMonth(someDate.Year, someDate.Month);
         }
     }
 }