C#、ASP.NET通用工具类IsWhat？（可以判断数字、身份证、数据类型等等）

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***/
 
//【isinrange】 
int num = 100;
//以前写法
if (num > 100 & num < 1000) { }
//现在写法
if (num.isinrange(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 }
 
 
//【isin】
string value = "a";
//以前写法我在很多项目中看到
if (value == "a" || value == "b" || value == "c") {
}
//现在写法
if (value.isin("a", "b", "c")) {
 
}
 
//【isvaluable与isnullorempty相反】
string ss = "";
//以前写法
if (!string.isnullorempty(ss)) { }
//现在写法
if (s.isvaluable()) { }
 
 
list<string> list = null;
//以前写法
if (list != null && list.count > 0) { }
//现在写法
if (list.isvaluable()) { }
 
 
 
 
//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 isinrange(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 isinrange(this datetime o, datetime begin, datetime end)
    {
      return o >= begin && o <= end;
    }
 
    /// <summary>
    /// 在里面吗?
    /// </summary>
    /// <typeparam name="t"></typeparam>
    /// <param name="o"></param>
    /// <param name="values"></param>
    /// <returns></returns>
    public static bool isin<t>(this t o, params t[] values)
    {
      return values.contains(o);
    }
 
    /// <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 isvaluable(this object o)
    {
      if (o == null) return false;
      return o.tostring() != "";
    }
    /// <summary>
    /// 有值?(与isnullorempty相反)
    /// </summary>
    /// <returns></returns>
    public static bool isvaluable(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>
    /// 是邮箱?
    /// </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());
    }
  }
}