Unity 使用this关键字进行函数拓展 - DateTime

Example：

1.  
   using System;
2.  
   using UnityEngine;
3.  
    
4.  
   using SK.Framework;
5.  
    
6.  
   public class Foo : MonoBehaviour
7.  
   {
8.  
   private void Start()
9.  
   {
10.  
    DateTime dt = DateTime.Now;
11.  
     
12.  
    //周六
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    dt.DayOfWeek.ToChinese();
14.  
    //星期六
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    dt.DayOfWeek.ToChinese2();
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17.  
    //yyyy/MM/dd
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    dt.ToDateString();
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    //yyyy-MM-dd
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    dt.ToDateString2();
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    //yyyy年MM月dd日
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    dt.ToDateString3();
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24.  
    //yyyy/MM/dd HH:mm:ss
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    dt.ToDateTimeString();
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    //yyyy-MM-dd HH:mm:ss
27.  
    dt.ToDateTimeString2();
28.  
    //yyyy年MM月dd日 HH:mm:ss
29.  
    dt.ToDateTimeString3();
30.  
    }
31.  
    }

Extension：

1.  
   using System;
2.  
    
3.  
   namespace SK.Framework
4.  
   {
5.  
   /// <summary>
6.  
   /// DateTime日期时间类相关拓展
7.  
   /// </summary>
8.  
   public static class DateTimeExtension
9.  
   {
10.  
    /// <summary>
11.  
    /// 获取时间戳
12.  
    /// </summary>
13.  
    /// <param name="self">时间</param>
14.  
    /// <returns>时间戳</returns>
15.  
    public static double GetTimeStamp(this DateTime self)
16.  
    {
17.  
    //计算机元年 1970年1月1日0时0分0秒
18.  
    return (self - new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalSeconds;
19.  
    }
20.  
    /// <summary>
21.  
    /// 转换为中文 （周*）
22.  
    /// </summary>
23.  
    /// <param name="self"></param>
24.  
    /// <returns></returns>
25.  
    public static string ToChinese(this DayOfWeek self)
26.  
    {
27.  
    switch (self)
28.  
    {
29.  
    case DayOfWeek.Monday: return "周一";
30.  
    case DayOfWeek.Tuesday: return "周二";
31.  
    case DayOfWeek.Wednesday: return "周三";
32.  
    case DayOfWeek.Thursday: return "周四";
33.  
    case DayOfWeek.Friday: return "周五";
34.  
    case DayOfWeek.Saturday: return "周六";
35.  
    case DayOfWeek.Sunday: return "周日";
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    default: return null;
37.  
    }
38.  
    }
39.  
    /// <summary>
40.  
    /// 转换为中文 （星期*）
41.  
    /// </summary>
42.  
    /// <param name="self"></param>
43.  
    /// <returns></returns>
44.  
    public static string ToChinese2(this DayOfWeek self)
45.  
    {
46.  
    switch (self)
47.  
    {
48.  
    case DayOfWeek.Monday: return "星期一";
49.  
    case DayOfWeek.Tuesday: return "星期二";
50.  
    case DayOfWeek.Wednesday: return "星期三";
51.  
    case DayOfWeek.Thursday: return "星期四";
52.  
    case DayOfWeek.Friday: return "星期五";
53.  
    case DayOfWeek.Saturday: return "星期六";
54.  
    case DayOfWeek.Sunday: return "星期日";
55.  
    default: return null;
56.  
    }
57.  
    }
58.  
    /// <summary>
59.  
    /// 转换格式 yyyy/MM/dd
60.  
    /// </summary>
61.  
    /// <param name="self"></param>
62.  
    /// <returns>yyyy/MM/dd</returns>
63.  
    public static string ToDateString(this DateTime self)
64.  
    {
65.  
    return self.ToString("yyyy/MM/dd");
66.  
    }
67.  
    /// <summary>
68.  
    /// 转换格式 yyyy-MM-dd
69.  
    /// </summary>
70.  
    /// <param name="self"></param>
71.  
    /// <returns>yyyy-MM-dd</returns>
72.  
    public static string ToDateString2(this DateTime self)
73.  
    {
74.  
    return self.ToString("yyyy-MM-dd");
75.  
    }
76.  
    /// <summary>
77.  
    /// 转换格式 yyyy年MM月dd日
78.  
    /// </summary>
79.  
    /// <param name="self"></param>
80.  
    /// <returns>yyyy年MM月dd日</returns>
81.  
    public static string ToDateString3(this DateTime self)
82.  
    {
83.  
    return self.ToString("yyyy年MM月dd日");
84.  
    }
85.  
    /// <summary>
86.  
    /// 转换格式 yyyy/MM/dd HH:mm:ss
87.  
    /// </summary>
88.  
    /// <param name="self"></param>
89.  
    /// <returns>yyyy/MM/dd HH:mm:ss</returns>
90.  
    public static string ToDateTimeString(this DateTime self)
91.  
    {
92.  
    return self.ToString("yyyy/MM/dd HH:mm:ss");
93.  
    }
94.  
    /// <summary>
95.  
    /// 转换格式 yyyy-MM-dd HH:mm:ss
96.  
    /// </summary>
97.  
    /// <param name="self"></param>
98.  
    /// <returns>yyyy-MM-dd HH:mm:ss</returns>
99.  
    public static string ToDateTimeString2(this DateTime self)
100.  
     {
101.  
     return self.ToString("yyyy-MM-dd HH:mm:ss");
102.  
     }
103.  
     /// <summary>
104.  
     /// 转换格式 yyyy年MM月dd日 HH:mm:ss
105.  
     /// </summary>
106.  
     /// <param name="self"></param>
107.  
     /// <returns>yyyy年MM月dd日 HH:mm:ss</returns>
108.  
     public static string ToDateTimeString3(this DateTime self)
109.  
     {
110.  
     return self.ToString("yyyy年MM月dd日 HH:mm:ss");
111.  
     }
112.  
     }
113.  
     }

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