一个生成随机密码的WPF小程序

实现环境：Visual Studio 2010

MainWindow.xaml

<Window x:Class="WpfApplication3.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="密码生成器" Height="93" Width="229" 
        WindowStartupLocation="CenterScreen" ResizeMode="NoResize">
    <Grid Width="203" Height="57">
        <ComboBox Height="23" HorizontalAlignment="Left" Name="comboBox1" 
                  VerticalAlignment="Top" Width="120">
            <ComboBoxItem Content="8" />
            <ComboBoxItem Content="9" />
            <ComboBoxItem Content="10" />
            <ComboBoxItem Content="11" />
            <ComboBoxItem Content="12" />
        </ComboBox>
        <Button Content="生成" Height="23" HorizontalAlignment="Left" 
                Margin="126,0,0,0" Name="button1" VerticalAlignment="Top" 
                Width="75" Click="button1_Click" />
        <Label Content="Label" Height="28" HorizontalAlignment="Left" 
               Margin="0,29,0,0" Name="label1" VerticalAlignment="Top" 
               Width="201" />
    </Grid>
</Window>

MainWindow.xmal.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication3
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private int lcc = 0;
        private int ucc = 0;
        private int ncc = 0;
        private int scc1 = 0;
        private int scc2 = 0;
        private int scc3 = 0;
        private int scc4 = 0;
        private int srmc = 0;
        public MainWindow()
        {
            InitializeComponent();
            comboBox1.SelectedIndex = 0;
            label1.Content = string.Empty;
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            int length = int.Parse(comboBox1.Text);
            char[] key = new char[length];
            int lc = -1, uc = -2, nc = -3, sc = -4;
            Random lr = new Random(DateTime.Now.Millisecond);
            lc = lr.Next(0, length - 1);
            while (true)
            {
                Random ur = new Random(DateTime.Now.Millisecond);
                uc = ur.Next(0, length - 1);
                if (uc != lc)
                    break;
            }
            while (true)
            {
                Random nr = new Random(DateTime.Now.Millisecond);
                nc = nr.Next(0, length - 1);
                if (nc != lc && nc != uc)
                    break;
            }
            while (true)
            {
                Random sr = new Random(DateTime.Now.Millisecond);
                sc = sr.Next(0, length - 1);
                if (sc != lc && sc != uc && sc != nc)
                    break;
            }
            for (int i = 0; i < length; i++)
            {
                if (i == lc)
                {
                    key[i] = generatelowercase();
                }
                else if (i == uc)
                {
                    key[i] = generateupercase();
                }
                else if (i == nc)
                {
                    key[i] = generateNumber();
                }
                else if (i == sc)
                {
                    key[i] = generatespeificcharacter();
                }
                else
                {
                    Random selector = new Random(DateTime.Now.Millisecond);
                    switch (selector.Next(0, 3))
                    {
                        case 0:
                            key[i] = generatelowercase();
                            break;
                        case 1:
                            key[i] = generateupercase();
                            break;
                        case 2:
                            key[i] = generateNumber();
                            break;
                        case 3:
                            key[i] = generatespeificcharacter();
                            break;
                    }
                }
            }
            string result = new string(key);
            label1.Content = result;
        }

        private char generatelowercase()
        {
            Random rm = new Random(DateTime.Now.Millisecond+lcc);
            lcc++;
            return (char)rm.Next(97, 122);
        }

        private char generateupercase()
        {
            Random rm = new Random(DateTime.Now.Millisecond+ucc);
            ucc++;
            return (char)rm.Next(65, 90);
        }

        private char generateNumber()
        {
            Random rm = new Random(DateTime.Now.Millisecond+ncc);
            ncc++;
            return (char)rm.Next(48, 57);
        }
        private char generatespeificcharacter()
        {
            char result = new char();
            Random srm = new Random(DateTime.Now.Millisecond+srmc);
            srmc++;
            switch (srm.Next(0, 3))
            {
                case 0:                    
                    Random rm = new Random(DateTime.Now.Millisecond+scc1);
                    scc1++;
                    result = (char)rm.Next(33, 47);
                    break;
                case 1: 
                    Random rm1 = new Random(DateTime.Now.Millisecond+scc2);
                    scc2++;
                    result = (char)rm1.Next(58, 64);
                    break;
                case 2:
                    Random rm2 = new Random(DateTime.Now.Millisecond+scc3);
                    scc3++;
                    result = (char)rm2.Next(91, 96);
                    break;
                case 3:
                    Random rm3 = new Random(DateTime.Now.Millisecond+scc4);
                    scc4++;
                    result = (char)rm3.Next(123, 126);
                    break;
            }
            return result;
        }
    }
}

资源下载：http://download.csdn.net/detail/tx_officedev/3900485