程序界面
源代碼：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Text.RegularExpressions;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string str = textBox1.Text;
if(isyz1(str))
{
MessageBox.Show("輸入正确","提示");
}
else
{
MessageBox.Show("輸入有誤，請重新輸入", "提示");
}
}
private void button3_Click(object sender, EventArgs e)
{
string str = textBox3.Text;
if (isyz3(str))
{
MessageBox.Show("輸入正确", "提示");
}
else
{
MessageBox.Show("輸入有誤，請重新輸入", "提示");
}
}
private void button2_Click(object sender, EventArgs e)
{
string str = textBox2.Text;
if (isyz2(str))
{
MessageBox.Show("輸入正确", "提示");
}
else
{
MessageBox.Show("輸入有誤，請重新輸入", "提示");
}
}
private void button4_Click(object sender, EventArgs e)
{
string str = textBox4.Text;
if (isyz4(str))
{
MessageBox.Show("輸入正确", "提示");
}
else
{
MessageBox.Show("輸入有誤，請重新輸入", "提示");
}
}
private void button5_Click(object sender, EventArgs e)
{
string str = textBox5.Text;
if (isyz5(str))
{
MessageBox.Show("輸入正确", "提示");
}
else
{
MessageBox.Show("輸入有誤，請重新輸入", "提示");
}
}
//驗證非0正整數
public bool isyz1(string sz)
{
return Regex.IsMatch(sz, @"^\ ?[1-9][0-9]*$");
}
//驗證非0負整數
public bool isyz3(string sz)
{
return Regex.IsMatch(sz, @"^\-[1-9][0-9]*$");
}
//驗證大寫字母
public bool isyz2(string sz)
{
return Regex.IsMatch(sz, @"^[A-Z] $");
}
//驗證小寫字母
public bool isyz4(string sz)
{
return Regex.IsMatch(sz, @"^[a-z] $");
}
public bool isyz5(string sz)
{
return Regex.IsMatch(sz, @"^[A-Za-z] $");
}
}
}
熟練掌握正則表達式數字和字母的驗證。
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