C#超实用代码段合集

前端技术 2023/09/06 C#

本文实例总结了几个非常实用的C#代码。分享给大家供大家参考，具体如下：

1. C#在托盘显示图标

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace notifyIconShow
{
 public partial class notifyIconShow : Form
 {
  public notifyIconShow()
  {
   InitializeComponent();
  }
  #region//设置鼠标放在托盘图标上面的文字
  /// <summary>
  /// 方法名称：notifyIconShow_Load(窗体加载事件)
  /// 方法作用：设置鼠标放在托盘图标上面的文字
  /// 完成日期：2010年5月16日
  /// 作者：心语
  /// </summary>
  /// <param name=\"sender\"></param>
  /// <param name=\"e\"></param>
  private void notifyIconShow_Load(object sender, EventArgs e)
  {
   //设置鼠标放在托盘图标上面的文字
   this.notifyIcon1.Text = \"心语托盘图标\";
  }
  #endregion
  #region//创建对象及声明变量
  //创建NotifyIcon对象
  NotifyIcon notifyicon = new NotifyIcon();
  //创建托盘图标对象
  Icon ico = new Icon(\"Clock2.ico\");
  //创建托盘菜单对象
  ContextMenu notifyContextMenu = new ContextMenu();
  #endregion
  #region//隐藏任务栏图标，显示托盘图标
  /// <summary>
  /// 方法名称：notifyIconShow_SizeChanged(窗体大小改变后事件)
  /// 方法作用：隐藏任务栏图标，显示托盘图标
  /// 完成日期：2010年5月16日
  /// 作者：心语
  /// </summary>
  /// <param name=\"sender\"></param>
  /// <param name=\"e\"></param>
  private void notifyIconShow_SizeChanged(object sender, EventArgs e)
  {
   //判断是否选择的是最小化按钮
   if (WindowState == FormWindowState.Minimized)
   {
    //托盘显示图标等于托盘图标对象
    //注意notifyIcon1是控件的名字而不是对象的名字
    notifyIcon1.Icon = ico;
    //隐藏任务栏区图标
    this.ShowInTaskbar = false;
    //图标显示在托盘区
    notifyicon.Visible = true;
   }
  }
  #endregion
  #region//还原窗体
  /// <summary>
  /// 方法名称：notifyIcon1_Click（托盘图标单击）
  /// 方法作用：还原窗体
  /// 完成日期：2010年5月16日
  /// 作者：心语
  /// </summary>
  /// <param name=\"sender\"></param>
  /// <param name=\"e\"></param>
  private void notifyIcon1_Click(object sender, EventArgs e)
  {
   //判断是否已经最小化于托盘
   if (WindowState == FormWindowState.Minimized)
   {
    //还原窗体显示
    WindowState = FormWindowState.Normal;
    //激活窗体并给予它焦点
    this.Activate();
    //任务栏区显示图标
    this.ShowInTaskbar = true;
    //托盘区图标隐藏
    notifyicon.Visible = false;
   }
  }
  #endregion
 }
}

2. C#求最小公倍数

class Program
{
  static void Main(string[] args)
  {
   int n = m(20, 15);
   System.Console.WriteLine(\"最小公倍数为:\" + n.ToString());
   System.Console.Read();
  }
  static int f(int a, int b)//最大公约数 
  {
   if (a < b) { a = a + b; b = a - b; a = a - b; }
   return (a % b == 0) ? b : f(a % b, b);
  }
  static int m(int a, int b)//最小公倍数 
  {
   return a * b / f(a, b);
  }
}

3. C#汉字转拼音

/// <summary> 
/// 把汉字转换成拼音(全拼) 
/// </summary> 
/// <param name=\"hzString\">汉字字符串</param> 
/// <returns>转换后的拼音(全拼)字符串</returns> 
public static string ConvertE(string hzString)
{
 // 匹配中文字符 
 Regex regex = new Regex(\"^[\\u4e00-\\u9fa5]$\");
 byte[] array = new byte[2];
 string pyString = \"\";
 int chrAsc = 0;
 int i1 = 0;
 int i2 = 0;
 char[] noWChar = hzString.ToCharArray();
 for (int j = 0; j < noWChar.Length; j++)
 {
  // 中文字符 
  if (regex.IsMatch(noWChar[j].ToString()))
  {
   array = System.Text.Encoding.Default.GetBytes(noWChar[j].ToString());
   i1 = (short)(array[0]);
   i2 = (short)(array[1]);
   chrAsc = i1 * 256 + i2 - 65536;
   if (chrAsc > 0 && chrAsc < 160)
   {
    pyString += noWChar[j];
   }
   else
   {
    // 修正部分文字 
    if (chrAsc == -9254) // 修正“圳”字 
     pyString += \"Zhen\";
    else
    {
     for (int i = (pyValue.Length - 1); i >= 0; i--)
     {
      if (pyValue[i] <= chrAsc)
      {
       pyString += pyName[i];
       break;
      }
     }
    }
   }
  }
  // 非中文字符 
  else
  {
   pyString += noWChar[j].ToString();
  }
 }
 return pyString;
}
private static int[] pyValue = new int[] 
{ 
 -20319,-20317,-20304,-20295,-20292,-20283,-20265,-20257,-20242,-20230,-20051,-20036, 
 -20032,-20026,-20002,-19990,-19986,-19982,-19976,-19805,-19784,-19775,-19774,-19763, 
 -19756,-19751,-19746,-19741,-19739,-19728,-19725,-19715,-19540,-19531,-19525,-19515, 
 -19500,-19484,-19479,-19467,-19289,-19288,-19281,-19275,-19270,-19263,-19261,-19249, 
 -19243,-19242,-19238,-19235,-19227,-19224,-19218,-19212,-19038,-19023,-19018,-19006, 
 -19003,-18996,-18977,-18961,-18952,-18783,-18774,-18773,-18763,-18756,-18741,-18735, 
 -18731,-18722,-18710,-18697,-18696,-18526,-18518,-18501,-18490,-18478,-18463,-18448, 
 -18447,-18446,-18239,-18237,-18231,-18220,-18211,-18201,-18184,-18183, -18181,-18012, 
 -17997,-17988,-17970,-17964,-17961,-17950,-17947,-17931,-17928,-17922,-17759,-17752, 
 -17733,-17730,-17721,-17703,-17701,-17697,-17692,-17683,-17676,-17496,-17487,-17482, 
 -17468,-17454,-17433,-17427,-17417,-17202,-17185,-16983,-16970,-16942,-16915,-16733, 
 -16708,-16706,-16689,-16664,-16657,-16647,-16474,-16470,-16465,-16459,-16452,-16448, 
 -16433,-16429,-16427,-16423,-16419,-16412,-16407,-16403,-16401,-16393,-16220,-16216, 
 -16212,-16205,-16202,-16187,-16180,-16171,-16169,-16158,-16155,-15959,-15958,-15944, 
 -15933,-15920,-15915,-15903,-15889,-15878,-15707,-15701,-15681,-15667,-15661,-15659, 
 -15652,-15640,-15631,-15625,-15454,-15448,-15436,-15435,-15419,-15416,-15408,-15394, 
 -15385,-15377,-15375,-15369,-15363,-15362,-15183,-15180,-15165,-15158,-15153,-15150, 
 -15149,-15144,-15143,-15141,-15140,-15139,-15128,-15121,-15119,-15117,-15110,-15109, 
 -14941,-14937,-14933,-14930,-14929,-14928,-14926,-14922,-14921,-14914,-14908,-14902, 
 -14894,-14889,-14882,-14873,-14871,-14857,-14678,-14674,-14670,-14668,-14663,-14654, 
 -14645,-14630,-14594,-14429,-14407,-14399,-14384,-14379,-14368,-14355,-14353,-14345, 
 -14170,-14159,-14151,-14149,-14145,-14140,-14137,-14135,-14125,-14123,-14122,-14112, 
 -14109,-14099,-14097,-14094,-14092,-14090,-14087,-14083,-13917,-13914,-13910,-13907, 
 -13906,-13905,-13896,-13894,-13878,-13870,-13859,-13847,-13831,-13658,-13611,-13601, 
 -13406,-13404,-13400,-13398,-13395,-13391,-13387,-13383,-13367,-13359,-13356,-13343, 
 -13340,-13329,-13326,-13318,-13147,-13138,-13120,-13107,-13096,-13095,-13091,-13076, 
 -13068,-13063,-13060,-12888,-12875,-12871,-12860,-12858,-12852,-12849,-12838,-12831, 
 -12829,-12812,-12802,-12607,-12597,-12594,-12585,-12556,-12359,-12346,-12320,-12300, 
 -12120,-12099,-12089,-12074,-12067,-12058,-12039,-11867,-11861,-11847,-11831,-11798, 
 -11781,-11604,-11589,-11536,-11358,-11340,-11339,-11324,-11303,-11097,-11077,-11067, 
 -11055,-11052,-11045,-11041,-11038,-11024,-11020,-11019,-11018,-11014,-10838,-10832, 
 -10815,-10800,-10790,-10780,-10764,-10587,-10544,-10533,-10519,-10331,-10329,-10328, 
 -10322,-10315,-10309,-10307,-10296,-10281,-10274,-10270,-10262,-10260,-10256,-10254 
};
private static string[] pyName = new string[] 
{ 
 \"A\",\"Ai\",\"An\",\"Ang\",\"Ao\",\"Ba\",\"Bai\",\"Ban\",\"Bang\",\"Bao\",\"Bei\",\"Ben\", 
 \"Beng\",\"Bi\",\"Bian\",\"Biao\",\"Bie\",\"Bin\",\"Bing\",\"Bo\",\"Bu\",\"Ba\",\"Cai\",\"Can\", 
 \"Cang\",\"Cao\",\"Ce\",\"Ceng\",\"Cha\",\"Chai\",\"Chan\",\"Chang\",\"Chao\",\"Che\",\"Chen\",\"Cheng\", 
 \"Chi\",\"Chong\",\"Chou\",\"Chu\",\"Chuai\",\"Chuan\",\"Chuang\",\"Chui\",\"Chun\",\"Chuo\",\"Ci\",\"Cong\", 
 \"Cou\",\"Cu\",\"Cuan\",\"Cui\",\"Cun\",\"Cuo\",\"Da\",\"Dai\",\"Dan\",\"Dang\",\"Dao\",\"De\", 
 \"Deng\",\"Di\",\"Dian\",\"Diao\",\"Die\",\"Ding\",\"Diu\",\"Dong\",\"Dou\",\"Du\",\"Duan\",\"Dui\", 
 \"Dun\",\"Duo\",\"E\",\"En\",\"Er\",\"Fa\",\"Fan\",\"Fang\",\"Fei\",\"Fen\",\"Feng\",\"Fo\", 
 \"Fou\",\"Fu\",\"Ga\",\"Gai\",\"Gan\",\"Gang\",\"Gao\",\"Ge\",\"Gei\",\"Gen\",\"Geng\",\"Gong\", 
 \"Gou\",\"Gu\",\"Gua\",\"Guai\",\"Guan\",\"Guang\",\"Gui\",\"Gun\",\"Guo\",\"Ha\",\"Hai\",\"Han\", 
 \"Hang\",\"Hao\",\"He\",\"Hei\",\"Hen\",\"Heng\",\"Hong\",\"Hou\",\"Hu\",\"Hua\",\"Huai\",\"Huan\", 
 \"Huang\",\"Hui\",\"Hun\",\"Huo\",\"Ji\",\"Jia\",\"Jian\",\"Jiang\",\"Jiao\",\"Jie\",\"Jin\",\"Jing\", 
 \"Jiong\",\"Jiu\",\"Ju\",\"Juan\",\"Jue\",\"Jun\",\"Ka\",\"Kai\",\"Kan\",\"Kang\",\"Kao\",\"Ke\", 
 \"Ken\",\"Keng\",\"Kong\",\"Kou\",\"Ku\",\"Kua\",\"Kuai\",\"Kuan\",\"Kuang\",\"Kui\",\"Kun\",\"Kuo\", 
 \"La\",\"Lai\",\"Lan\",\"Lang\",\"Lao\",\"Le\",\"Lei\",\"Leng\",\"Li\",\"Lia\",\"Lian\",\"Liang\", 
 \"Liao\",\"Lie\",\"Lin\",\"Ling\",\"Liu\",\"Long\",\"Lou\",\"Lu\",\"Lv\",\"Luan\",\"Lue\",\"Lun\", 
 \"Luo\",\"Ma\",\"Mai\",\"Man\",\"Mang\",\"Mao\",\"Me\",\"Mei\",\"Men\",\"Meng\",\"Mi\",\"Mian\", 
 \"Miao\",\"Mie\",\"Min\",\"Ming\",\"Miu\",\"Mo\",\"Mou\",\"Mu\",\"Na\",\"Nai\",\"Nan\",\"Nang\", 
 \"Nao\",\"Ne\",\"Nei\",\"Nen\",\"Neng\",\"Ni\",\"Nian\",\"Niang\",\"Niao\",\"Nie\",\"Nin\",\"Ning\", 
 \"Niu\",\"Nong\",\"Nu\",\"Nv\",\"Nuan\",\"Nue\",\"Nuo\",\"O\",\"Ou\",\"Pa\",\"Pai\",\"Pan\", 
 \"Pang\",\"Pao\",\"Pei\",\"Pen\",\"Peng\",\"Pi\",\"Pian\",\"Piao\",\"Pie\",\"Pin\",\"Ping\",\"Po\", 
 \"Pu\",\"Qi\",\"Qia\",\"Qian\",\"Qiang\",\"Qiao\",\"Qie\",\"Qin\",\"Qing\",\"Qiong\",\"Qiu\",\"Qu\", 
 \"Quan\",\"Que\",\"Qun\",\"Ran\",\"Rang\",\"Rao\",\"Re\",\"Ren\",\"Reng\",\"Ri\",\"Rong\",\"Rou\", 
 \"Ru\",\"Ruan\",\"Rui\",\"Run\",\"Ruo\",\"Sa\",\"Sai\",\"San\",\"Sang\",\"Sao\",\"Se\",\"Sen\", 
 \"Seng\",\"Sha\",\"Shai\",\"Shan\",\"Shang\",\"Shao\",\"She\",\"Shen\",\"Sheng\",\"Shi\",\"Shou\",\"Shu\", 
 \"Shua\",\"Shuai\",\"Shuan\",\"Shuang\",\"Shui\",\"Shun\",\"Shuo\",\"Si\",\"Song\",\"Sou\",\"Su\",\"Suan\", 
 \"Sui\",\"Sun\",\"Suo\",\"Ta\",\"Tai\",\"Tan\",\"Tang\",\"Tao\",\"Te\",\"Teng\",\"Ti\",\"Tian\", 
 \"Tiao\",\"Tie\",\"Ting\",\"Tong\",\"Tou\",\"Tu\",\"Tuan\",\"Tui\",\"Tun\",\"Tuo\",\"Wa\",\"Wai\", 
 \"Wan\",\"Wang\",\"Wei\",\"Wen\",\"Weng\",\"Wo\",\"Wu\",\"Xi\",\"Xia\",\"Xian\",\"Xiang\",\"Xiao\", 
 \"Xie\",\"Xin\",\"Xing\",\"Xiong\",\"Xiu\",\"Xu\",\"Xuan\",\"Xue\",\"Xun\",\"Ya\",\"Yan\",\"Yang\", 
 \"Yao\",\"Ye\",\"Yi\",\"Yin\",\"Ying\",\"Yo\",\"Yong\",\"You\",\"Yu\",\"Yuan\",\"Yue\",\"Yun\", 
 \"Za\", \"Zai\",\"Zan\",\"Zang\",\"Zao\",\"Ze\",\"Zei\",\"Zen\",\"Zeng\",\"Zha\",\"Zhai\",\"Zhan\", 
 \"Zhang\",\"Zhao\",\"Zhe\",\"Zhen\",\"Zheng\",\"Zhi\",\"Zhong\",\"Zhou\",\"Zhu\",\"Zhua\",\"Zhuai\",\"Zhuan\", 
 \"Zhuang\",\"Zhui\",\"Zhun\",\"Zhuo\",\"Zi\",\"Zong\",\"Zou\",\"Zu\",\"Zuan\",\"Zui\",\"Zun\",\"Zuo\" 
};

4. C#计算代码运行时间

//导入该命名空间
using System.Diagnostice;
Stopwatch watch=new Stopwatch ();
watch.Start();
/*
此处为要计算的运行代码
*/
watch.Stop();
//获取当前实例测量得出的总运行时间（以毫秒为单位）
string time = watch.ElapsedMilliseconds.ToString();

5. C#根据日期获取星期方法

protected void Page_Load(object sender, EventArgs e)
{
    int m = System.DateTime.Today.Month;
    int y = System.DateTime.Today.Year;
    int d = System.DateTime.Today.Day;
    int weeks = getWeekDay(y, m, d);
    switch (weeks)
    {
      case 1:
        this.TextBox1.Text = \"星期一\";
        break;
      case 2:
        this.TextBox1.Text = \"星期二\";
        break;
      case 3:
        this.TextBox1.Text = \"星期三\";
        break;
      case 4:
        this.TextBox1.Text = \"星期四\";
        break;
      case 5:
        this.TextBox1.Text = \"星期五\";
        break;
      case 6:
        this.TextBox1.Text = \"星期六\";
        break;
      case 7:
        this.TextBox1.Text = \"星期日\";
        break;
    }
}
/// <summary>根据日期，获得星期几</summary>
/// <param name=\"y\">年</param>
/// <param name=\"m\">月</param>
/// <param name=\"d\">日</param>
/// <returns>星期几，1代表星期一；7代表星期日</returns>
public static int getWeekDay(int y, int m, int d)
{
    if (m == 1) m = 13;
    if (m == 2) m = 14;
    int week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7 + 1;
    return week;
}

6. C#删除文件夹的方法

/// <summary>
/// C# 删除文件夹
/// 用法： DeleteFolder(@\"c:\\\\1\");
/// </summary>
/// <param name=\"dir\"></param>
private static void DeleteFolder(string dir)
{
  // 循环文件夹里面的内容
  foreach (string f in Directory.GetFileSystemEntries(dir))
  {
  // 如果是文件存在
  if (File.Exists(f))
  {
  FileInfo fi = new FileInfo(f);
  if (fi.Attributes.ToString().IndexOf(\"Readonly\") != 1)
  {
  fi.Attributes = FileAttributes.Normal;
  }
  // 直接删除其中的文件
  File.Delete(f);
  }
  else
  {
  // 如果是文件夹存在
  // 递归删除子文件夹
  DeleteFolder(f);
  }
  }
  // 删除已空文件夹
  Directory.Delete(dir);
}

希望本文所述对大家C#程序设计有所帮助。

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