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")) {
}【IsContainsIn】
//以前写法
if ("abcd".Contains("abc") || "abcd".Contains("xxx"))
{
}
//现在写法
if ("abcd".IsContainsIn("abc", "xxx")) {
}【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：
/// <summary>
/// ** 描述：逻辑判段是什么？
/// ** 创始时间：2015-5-29
/// ** 修改时间：-
/// ** 作者：sunkaixuan
/// ** 使用说明：http://www.cnblogs.com/sunkaixuan/p/4539654.html
/// </summary>
public static class IsWhatExtenions
{
/// <summary>
/// 值在的范围？
/// </summary>
/// <param name="thisValue"></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 thisValue, int begin, int end)
{
return thisValue >= begin && thisValue <= end;
}
/// <summary>
/// 值在的范围？
/// </summary>
/// <param name="thisValue"></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 thisValue, DateTime begin, DateTime end)
{
return thisValue >= begin && thisValue <= end;
}
/// <summary>
/// 在里面吗?
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="thisValue"></param>
/// <param name="values"></param>
/// <returns></returns>
public static bool IsIn<T>(this T thisValue, params T[] values)
{
return values.Contains(thisValue);
}
/// <summary>
/// 在里面吗?
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="thisValue"></param>
/// <param name="values"></param>
/// <returns></returns>
public static bool IsContainsIn(this string thisValue, params string[] inValues)
{
return inValues.Any(it => thisValue.Contains(it));
}
/// <summary>
/// 是null或""?
/// </summary>
/// <returns></returns>
public static bool IsNullOrEmpty(this object thisValue)
{
if (thisValue == null || thisValue == DBNull.Value) return true;
return thisValue.ToString() == "";
}
/// <summary>
/// 是null或""?
/// </summary>
/// <returns></returns>
public static bool IsNullOrEmpty(this Guid? thisValue)
{
if (thisValue == null) return true;
return thisValue == Guid.Empty;
}
/// <summary>
/// 是null或""?
/// </summary>
/// <returns></returns>
public static bool IsNullOrEmpty(this Guid thisValue)
{
if (thisValue == null) return true;
return thisValue == Guid.Empty;
}
/// <summary>
/// 有值?(与IsNullOrEmpty相反)
/// </summary>
/// <returns></returns>
public static bool IsValuable(this object thisValue)
{
if (thisValue == null) return false;
return thisValue.ToString() != "";
}
/// <summary>
/// 有值?(与IsNullOrEmpty相反)
/// </summary>
/// <returns></returns>
public static bool IsValuable(this IEnumerable<object> thisValue)
{
if (thisValue == null || thisValue.Count() == 0) return false;
return true;
}
/// <summary>
/// 是零?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsZero(this object thisValue)
{
return (thisValue == null || thisValue.ToString() == "0");
}
/// <summary>
/// 是INT?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsInt(this object thisValue)
{
if (thisValue == null) return false;
return Regex.IsMatch(thisValue.ToString(), @"^\d+$");
}
/// <summary>
/// 不是INT?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsNoInt(this object thisValue)
{
if (thisValue == null) return true;
return !Regex.IsMatch(thisValue.ToString(), @"^\d+$");
}
/// <summary>
/// 是金钱?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsMoney(this object thisValue)
{
if (thisValue == null) return false;
double outValue = 0;
return double.TryParse(thisValue.ToString(), out outValue);
}
/// <summary>
/// 是时间?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsDate(this object thisValue)
{
if (thisValue == null) return false;
DateTime outValue = DateTime.MinValue;
return DateTime.TryParse(thisValue.ToString(), out outValue);
}
/// <summary>
/// 是邮箱?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsEamil(this object thisValue)
{
if (thisValue == null) return false;
return Regex.IsMatch(thisValue.ToString(), @"^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$");
}
/// <summary>
/// 是手机?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsMobile(this object thisValue)
{
if (thisValue == null) return false;
return Regex.IsMatch(thisValue.ToString(), @"^\d{11}$");
}
/// <summary>
/// 是座机?
/// </summary>
public static bool IsTelephone(this object thisValue)
{
if (thisValue == null) return false;
return System.Text.RegularExpressions.Regex.IsMatch(thisValue.ToString(), @"^(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}$");
}
/// <summary>
/// 是身份证?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsIDcard(this object thisValue)
{
if (thisValue == null) return false;
return System.Text.RegularExpressions.Regex.IsMatch(thisValue.ToString(), @"^(\d{15}$|^\d{18}$|^\d{17}(\d|X|x))$");
}
/// <summary>
/// 是传真?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsFax(this object thisValue)
{
if (thisValue == null) return false;
return System.Text.RegularExpressions.Regex.IsMatch(thisValue.ToString(), @"^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$");
}
/// <summary>
///是适合正则匹配?
/// </summary>
/// <param name="thisValue"></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 thisValue, string pattern)
{
if (thisValue == null) return false;
Regex reg = new Regex(pattern);
return reg.IsMatch(thisValue.ToString());
}
/// <summary>
/// 是true?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsTrue(this object thisValue)
{
return Convert.ToBoolean(thisValue);
}
/// <summary>
/// 是false?
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool IsFalse(this object thisValue)
{
return !Convert.ToBoolean(thisValue);
}
}
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