C#超实用代码段合集
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
usingSystem;
usingSystem.Collections.Generic;
usingSystem.ComponentModel;
usingSystem.Data;
usingSystem.Drawing;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Windows.Forms;
namespacenotifyIconShow
{
publicpartialclassnotifyIconShow:Form
{
publicnotifyIconShow()
{
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>
///<paramname="sender"></param>
///<paramname="e"></param>
privatevoidnotifyIconShow_Load(objectsender,EventArgse)
{
//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
NotifyIconnotifyicon=newNotifyIcon();
//创建托盘图标对象
Iconico=newIcon("Clock2.ico");
//创建托盘菜单对象
ContextMenunotifyContextMenu=newContextMenu();
#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>
///<paramname="sender"></param>
///<paramname="e"></param>
privatevoidnotifyIconShow_SizeChanged(objectsender,EventArgse)
{
//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>
///<paramname="sender"></param>
///<paramname="e"></param>
privatevoidnotifyIcon1_Click(objectsender,EventArgse)
{
//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
classProgram
{
staticvoidMain(string[]args)
{
intn=m(20,15);
System.Console.WriteLine("最小公倍数为:"+n.ToString());
System.Console.Read();
}
staticintf(inta,intb)//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);
}
staticintm(inta,intb)//最小公倍数
{
returna*b/f(a,b);
}
}
3.C#汉字转拼音
///<summary>
///把汉字转换成拼音(全拼)
///</summary>
///<paramname="hzString">汉字字符串</param>
///<returns>转换后的拼音(全拼)字符串</returns>
publicstaticstringConvertE(stringhzString)
{
//匹配中文字符
Regexregex=newRegex("^[\u4e00-\u9fa5]$");
byte[]array=newbyte[2];
stringpyString="";
intchrAsc=0;
inti1=0;
inti2=0;
char[]noWChar=hzString.ToCharArray();
for(intj=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(inti=(pyValue.Length-1);i>=0;i--)
{
if(pyValue[i]<=chrAsc)
{
pyString+=pyName[i];
break;
}
}
}
}
}
//非中文字符
else
{
pyString+=noWChar[j].ToString();
}
}
returnpyString;
}
privatestaticint[]pyValue=newint[]
{
-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
};
privatestaticstring[]pyName=newstring[]
{
"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 usingSystem.Diagnostice; Stopwatchwatch=newStopwatch(); 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） stringtime=watch.ElapsedMilliseconds.ToString();
5.C#根据日期获取星期方法
protectedvoidPage_Load(objectsender,EventArgse)
{
intm=System.DateTime.Today.Month;
inty=System.DateTime.Today.Year;
intd=System.DateTime.Today.Day;
intweeks=getWeekDay(y,m,d);
switch(weeks)
{
case1:
this.TextBox1.Text="星期一";
break;
case2:
this.TextBox1.Text="星期二";
break;
case3:
this.TextBox1.Text="星期三";
break;
case4:
this.TextBox1.Text="星期四";
break;
case5:
this.TextBox1.Text="星期五";
break;
case6:
this.TextBox1.Text="星期六";
break;
case7:
this.TextBox1.Text="星期日";
break;
}
}
///<summary>根据日期，获得星期几</summary>
///<paramname="y">年</param>
///<paramname="m">月</param>
///<paramname="d">日</param>
///<returns>星期几，1代表星期一；7代表星期日</returns>
publicstaticintgetWeekDay(inty,intm,intd)
{
if(m==1)m=13;
if(m==2)m=14;
intweek=(d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7+1;
returnweek;
}
6.C#删除文件夹的方法
///<summary>
///C#删除文件夹
///用法：DeleteFolder(@"c:\\1");
///</summary>
///<paramname="dir"></param>
privatestaticvoidDeleteFolder(stringdir)
{
//循环文件夹里面的内容
foreach(stringfinDirectory.GetFileSystemEntries(dir))
{
//如果是文件存在
if(File.Exists(f))
{
FileInfofi=newFileInfo(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。