摘要：
下边是实现的代码：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.Text.RegularExpressions;namespace Registerting{ public partial class Form1 : Form { public Form1() { I 阅读全文
摘要：
string reg = @"^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$"; 阅读全文
摘要：
publicForm1(){InitializeComponent(); textBox1.Enter+=newEventHandler(textBox1_Enter);//获得焦点事件 textBox1.Leave+=newEventHandler(textBox1_Leave);//失去焦点事件。 }void textBox1_Enter(object sender,EventArgs e){MessageBox.Show("获得了焦点");}void textBox1_Leave(object sender,EventArgs e){MessageBox.Show(& 阅读全文