C#ASP.NET 通用扩展函数之 IsWhat 简单好用

好东西都需要人去整理、分类

注意：需要引用命名空间 SyntacticSugar

用法：

/***扩展函数名细***/              //【IsArea】               int num = 100;             //以前写法             if (num > 100 & num < 1000) { }             //现在写法             if (num.IsArea(100, 1000)) { } //datetime类型也支持                //【IsNullOrEmpty】             object s = "";             //以前写法             if (s == null || string.IsNullOrEmpty(s.ToString())) { }             //现在写法             if (s.IsNullOrEmpty()) { }             //更顺手了没有 }               //【IsHasValue】             string ss = "";             //以前写法             if (!string.IsNullOrEmpty(ss)) { }             //现在写法             if (s.IsHasValue()) { }               List<string> list = null;             //以前写法             if (list != null && list.Count > 0) { }             //现在写法             if (list.IsHasValue()) { }                 //IsIDcard             if ("32061119810104311x".IsIDcard())             {              }              //IsTelephone             if ("0513-85669884".IsTelephone())             {              }              //IsMatch 节约你引用Regex的命名空间了             if ("我中国人12".IsMatch(@"人/d{2}")) { }               //下面还有很多太简单了的就不介绍了             //IsZero             //IsInt             //IsNoInt             //IsMoney              //IsEamil              //IsMobile

源码：

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Text.RegularExpressions; namespace SyntacticSugar {  /// <summary>  /// ** 描述：逻辑判段是什么？  /// ** 创始时间：2015-5-29  /// ** 修改时间：-  /// ** 作者：sunkaixuan  /// </summary>  public static class IsWhat  {   /// <summary>   /// 值在的范围？   /// </summary>   /// <param name="o"></param>   /// <param name="begin">大于等于begin</param>   /// <param name="end">小于等于end</param>   /// <returns></returns>   public static bool IsArea(this int o, int begin, int end)   {    return o >= begin && o <= end;   }   /// <summary>   /// 值在的范围？   /// </summary>   /// <param name="o"></param>   /// <param name="begin">大于等于begin</param>   /// <param name="end">小于等于end</param>   /// <returns></returns>   public static bool IsArea(this DateTime o, DateTime begin, DateTime end)   {    return o >= begin && o <= end;   }   /// <summary>   /// 是null或""?   /// </summary>   /// <returns></returns>   public static bool IsNullOrEmpty(this object o)   {    if (o == null || o == DBNull.Value) return true;    return o.ToString() == "";   }   /// <summary>   /// 是null或""?   /// </summary>   /// <returns></returns>   public static bool IsNullOrEmpty(this Guid? o)   {    if (o == null) return true;    return o == Guid.Empty;   }   /// <summary>   /// 是null或""?   /// </summary>   /// <returns></returns>   public static bool IsNullOrEmpty(this Guid o)   {    if (o == null) return true;    return o == Guid.Empty;   }   /// <summary>   /// 有值?(与IsNullOrEmpty相反)   /// </summary>   /// <returns></returns>   public static bool IsHasValue(this object o)   {    if (o == null) return false;    return o.ToString() != "";   }   /// <summary>   /// 有值?(与IsNullOrEmpty相反)   /// </summary>   /// <returns></returns>   public static bool IsHasValue(this IEnumerable<object> o)   {    if (o == null || o.Count() == 0) return false;    return true;   }   /// <summary>   /// 是零?   /// </summary>   /// <param name="o"></param>   /// <returns></returns>   public static bool IsZero(this object o)   {    return (o == null || o.ToString() == "0");   }   /// <summary>   /// 是INT?   /// </summary>   /// <param name="o"></param>   /// <returns></returns>   public static bool IsInt(this object o)   {    if (o == null) return false;    return Regex.IsMatch(o.ToString(), @"^/d+$");   }   /// <summary>   /// 不是INT?   /// </summary>   /// <param name="o"></param>   /// <returns></returns>   public static bool IsNoInt(this object o)   {    if (o == null) return true;    return !Regex.IsMatch(o.ToString(), @"^/d+$");   }   /// <summary>   /// 是金钱?   /// </summary>   /// <param name="o"></param>   /// <returns></returns>   public static bool IsMoney(this object o)   {    if (o == null) return false;    double outValue = 0;    return double.TryParse(o.ToString(), out outValue);   }   /// <summary>   /// 是   /// </summary>   /// <param name="o"></param>   /// <returns></returns>   public static bool IsEamil(this object o)   {    if (o == null) return false;    return Regex.IsMatch(o.ToString(), @"^[/w-]+(/.[/w-]+)*@[/w-]+(/.[/w-]+)+$");   }   /// <summary>   /// 是手机?   /// </summary>   /// <param name="o"></param>   /// <returns></returns>   public static bool IsMobile(this object o)   {    if (o == null) return false;    return Regex.IsMatch(o.ToString(), @"^/d{11}$");   }   /// <summary>   /// 是座机?   /// </summary>   public static bool IsTelephone(this object o)   {    if (o == null) return false;    return System.Text.RegularExpressions.Regex.IsMatch(o.ToString(), @"^(/(/d{3,4}/)|/d{3,4}-|/s)?/d{8}$");   }   /// <summary>   /// 是身份证?   /// </summary>   /// <param name="o"></param>   /// <returns></returns>   public static bool IsIDcard(this object o)   {    if (o == null) return false;    return System.Text.RegularExpressions.Regex.IsMatch(o.ToString(), @"^(/d{15}$|^/d{18}$|^/d{17}(/d|X|x))$");   }   /// <summary>   ///是适合正则匹配?   /// </summary>   /// <param name="o"></param>   /// <param name="begin">大于等于begin</param>   /// <param name="end">小于等于end</param>   /// <returns></returns>   public static bool IsMatch(this object o, string pattern)   {    if (o == null) return false;    Regex reg = new Regex(pattern);    return reg.IsMatch(o.ToString());   }  } }