随笔档案「2011年10月」 - C#_初学者

丶正则表达式验证手机号码

摘要：我想问个问题啊为什么代码贴过来以后没有自动缩进了呢我郁闷的前面的都还好好的。现在怎么没了呢！这段代码的关键还是在于对正则表达式的理解！@"^[1][3-5,8]\d{9}$" 详解@去除后面的转义字符的效果^表示匹配行开始$表示匹配行结束[1]表示第一为数为1 只为1[3-5,8] 表示第二位数字可以为 3，4，5，8四个中的其中任何一个\d表示匹配数字注：\还表示转义字符前面的@就是为了消除它的效果{9}表示限制符意即[1][3-5,8]后面可以输入9位数字using System;using System.Collections.Generic 阅读全文

posted @ 2011-10-27 22:57 C#_初学者阅读(300) 评论(0) 推荐(0)

丶如何确定系统的运行时间

摘要：效果图：代码：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;using System.Threading;namespace Example66{ public partial class Form1 : Form { public Form1() { InitializeComponent( 阅读全文

posted @ 2011-10-26 23:12 C#_初学者阅读(294) 评论(0) 推荐(0)

丶根据出生日期计算年龄

摘要：效果图：说明：本实例中使用了VB程序集中DateTime类的DateDiff方法来计算日期的差！需要引用该类资源管理器中右键添加引用 .net页Microsoft.VisualBasic 确定即可然后在工程文件里引用它 using Microsoft.VisualBasic;代码：using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text... 阅读全文

posted @ 2011-10-26 21:09 C#_初学者阅读(1441) 评论(0) 推荐(0)

丶设置系统日期时间

摘要：效果图：代码：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;using System.Runtime.InteropServices;namespace Example54{ public partial class Form1 : Form { public Form1() ... 阅读全文

posted @ 2011-10-23 19:38 C#_初学者阅读(452) 评论(0) 推荐(0)

丶动态获取系统当前时间

摘要：效果图：代码：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 Example53{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } ... 阅读全文

posted @ 2011-10-23 18:49 C#_初学者阅读(417) 评论(0) 推荐(0)

丶格式化输入数据为货币格式

摘要：效果图：代码：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;using System.Globalization;namespace Example51{ public partial class Form1 : Form { public Form1() { Ini... 阅读全文

posted @ 2011-10-23 17:33 C#_初学者阅读(348) 评论(0) 推荐(0)

丶对计算结果进行四舍五入

摘要：效果图：原理：在所有要丢失精度的小数位中加5，大于10进位代码：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 Example48{ public partial class Form1 : Form { public Form1() { Initi... 阅读全文

posted @ 2011-10-23 13:37 C#_初学者阅读(277) 评论(0) 推荐(0)

丶判断输入的货币值是否为数字

摘要：TryParse方法首先会尝试将字符串转换为指定数值类型，如果转换成功则返回 True 并对参数中变量赋值。否则返回False 语法如下：double.TryParse(string str, out double result);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;name 阅读全文

posted @ 2011-10-23 13:15 C#_初学者阅读(247) 评论(0) 推荐(0)

丶对字符串进行加密和解密

摘要：效果图：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 Example46{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } pr... 阅读全文

posted @ 2011-10-23 12:33 C#_初学者阅读(282) 评论(0) 推荐(0)

丶获取字符串中汉字的个数

摘要：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;using System.Text.RegularExpressions;namespace Example44{ public partial class Form1 : Form { public Form1() { ... 阅读全文

posted @ 2011-10-21 00:21 C#_初学者阅读(337) 评论(0) 推荐(0)

丶从字符串中分离文件路径、文件名和扩展名

摘要：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 Example43{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } privat... 阅读全文

posted @ 2011-10-20 01:18 C#_初学者阅读(1892) 评论(0) 推荐(0)

丶去除字符串中的所有空格

摘要：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;using System.Collections; // 引用 IEnumeratornamespace Example42{ public partial class Form1 : Form { public Form1() {... 阅读全文

posted @ 2011-10-20 00:24 C#_初学者阅读(284) 评论(0) 推荐(0)

丶将字符串的每个字符进行颠倒输出

摘要：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 Example41{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } privat... 阅读全文

posted @ 2011-10-19 22:51 C#_初学者阅读(562) 评论(0) 推荐(0)

丶根据标点符号对字符串进行分行

摘要：// 效果图 --------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 Example39{ public partial class Form1 : Form { public Form1() { InitializeComponent();... 阅读全文

posted @ 2011-10-18 23:43 C#_初学者阅读(1286) 评论(0) 推荐(0)

丶汉字与区位码的转换

摘要：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 Example37{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } privat... 阅读全文

posted @ 2011-10-18 21:50 C#_初学者阅读(508) 评论(0) 推荐(0)

丶字母与ASCII码的转换

摘要：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 Example36{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } privat... 阅读全文

posted @ 2011-10-18 21:25 C#_初学者阅读(706) 评论(0) 推荐(0)

丶将字母全部转换为大写或小写

摘要：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 Example35{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } privat... 阅读全文

posted @ 2011-10-18 20:32 C#_初学者阅读(816) 评论(0) 推荐(0)

丶使用goto语句在数组中搜索指定图书

摘要：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 Example34{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } string... 阅读全文

posted @ 2011-10-18 01:29 C#_初学者阅读(381) 评论(0) 推荐(0)

丶制作一个数字猜猜看小游戏

摘要：效果图 ----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;using System.Threading; //用到了线程namespace Example33{ public partial class Form1 : Form { public Form1() { ... 阅读全文

posted @ 2011-10-17 23:31 C#_初学者阅读(2203) 评论(0) 推荐(0)

丶递归算法的经典面试题

摘要：1，1，2，3，5，8，13，21，34....... 要求用递归的方法算出第 30 个数是多少！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 Example32{ public partial class Form1 : Form { public Form1... 阅读全文

posted @ 2011-10-17 21:48 C#_初学者阅读(1229) 评论(0) 推荐(0)

丶循环向控制台中输入内容

摘要：using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Example31{ class Program { static void Main(string[] args) { Console.Title = "循环向控制台中输入内容"; //定义控制台标题 Console.WindowWidth = 30; //窗体宽度 Console.WindowHeight = 2; //窗体高度 ... 阅读全文

posted @ 2011-10-17 01:34 C#_初学者阅读(865) 评论(0) 推荐(0)

丶使用as关键字将对象转换为指定类型

摘要：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;using System.IO;namespace Example26{ public partial class Form1 : Form { public Form1() { InitializeComponent()... 阅读全文

posted @ 2011-10-17 01:33 C#_初学者阅读(268) 评论(0) 推荐(0)

丶使用is关键字判断对象是否与指定类型兼容

摘要：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 Example24{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } privat... 阅读全文

posted @ 2011-10-17 01:32 C#_初学者阅读(280) 评论(0) 推荐(0)

丶使用 typeof 关键字获取类的内部结构

摘要：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;using System.Reflection; // MethodInfo 需要引用namespace Example23{ public partial class Form1 : Form { public Form1() {... 阅读全文

posted @ 2011-10-17 01:27 C#_初学者阅读(219) 评论(0) 推荐(0)

丶使用 checked 关键字处理溢出错误信息

摘要：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 Example22{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } privat... 阅读全文

posted @ 2011-10-17 01:25 C#_初学者阅读(307) 评论(0) 推荐(0)

丶使用条件运算符判断指定年份是不是闰年

摘要：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 Example20{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } privat... 阅读全文

posted @ 2011-10-17 01:22 C#_初学者阅读(768) 评论(1) 推荐(0)

丶巧用位移运算符获取汉字编码值

摘要：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 Example019{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } priva... 阅读全文

posted @ 2011-10-17 01:06 C#_初学者阅读(647) 评论(0) 推荐(0)