zoukankan      html  css  js  c++  java
  • Top useful .Net extension methods

    Special extension methods were released in C# 3.0. Developers have continuously been looking for ways to extend classes to every coding and got top most preferable extension methods for .net development.
    Is there a class that just doesn’t do enough for you? Is it true that you always wanted to add more onto a Date-Time class, but somehow you couldn’t? Things which were not possible earlier can be true with extension methods that C# 3.0 unveiled.

    What are extension methods?

    Extension methods empower developers to build new functionality for existing types without altering the actual type itself. The major characteristics of an extension method are:

    • The method needs to be static
    • The class needs to be static
    • The method’s initial parameter in the signature should have the “this” declared
    Top useful .net extension methods are:

    1. ToFileSize-Type: Long
    It was required by developers because it was easier to read the number. Developers can convert it into formatted number with the apt size metric.

    2. ToXmlDocument()/ToXDocument() – Type: XmlDocument or XDocument
    Your developer can’t explain how many times he needs to convert an XmlDocument into an XDocument and vice versa for LINQ use. The following handy extension methods are intended to save huge time.

    3. Between() – Type: Daytime
    It is used to check if a date is between two dates.

    4. CalculateAge() – Type: DateTime
    As the name suggests, it is used for calculating age.

    5. Workingday()/Isweekend()/NextWorkday() – Type: Datetime
    It is used for determining if a date is a working day, weekend, or finding the next upcoming workingday.

    6. Next() – Type: DateTime
    It is used for determining the Next Date by passing in a DayofWeek.

    7. Has()/Is()/Add()/Remove() – type Enum
    This extension method is great when an enumerated type is flag instead of full items.

            public static bool Has<T>(this System.Enum type, T value)
            {
                try { return (((int)(object)type & (int)(object)value) == (int)(object)value); }
                catch { return false; }
            }
            public static bool Is<T>(this System.Enum type, T value)
            {
                try { return (int)(object)type == (int)(object)value; }
                catch { return false; }
            }
            public static T Add<T>(this System.Enum type, T value)
            {
                try { return (T)(object)(((int)(object)type | (int)(object)value)); }
                catch (Exception ex) { throw new ArgumentException(string.Format("Could not append value from enumerated type '{0}'.", typeof(T).Name), ex); }
            }
            public static T Remove<T>(this System.Enum type, T value)
            {
                try { return (T)(object)(((int)(object)type & ~(int)(object)value)); }
                catch (Exception ex) { throw new ArgumentException(string.Format("Could not remove value from enumerated type '{0}'.", typeof(T).Name), ex); }
            }
     
  • 相关阅读:
    Java实现HadoopHA集群的hdfs控制
    Hadoop-2.8.5的HA集群搭建
    Python实现bing必应壁纸下载
    使用Python3将Markdown(.md)文本转换成 html、pdf
    使用GitHub作Free图床
    JavaMail实践--实现邮件发送
    Python3实现图片转字符画
    Java编写的Java编辑器_JavaIDE
    Java实现简易版计算器
    Java实现Excel表格操作--API:jxl
  • 原文地址:https://www.cnblogs.com/itelite/p/4241691.html
Copyright © 2011-2022 走看看