C#简单生成随机密码的方法示例

2019-10-29 21:09:14

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本文实例讲述了C#简单生成随机密码的方法。分享给大家供大家参考，具体如下：

using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Windows.Forms;public partial class _Default : System.Web.UI.Page{  public static int counter = 0;  protected void Page_Load(object sender, EventArgs e)  {  }  public static string MakePassword(string pwdchars, int pwdlen)  {    //判斷隨機密碼的長度    string tmpstr = "";    int iRandNum;    if (pwdlen > pwdchars.Length)    {      return "长度过长！" + pwdchars.Length;    }    Random rnd = new Random();    for (int i = 0; i < pwdlen; i++)    {      iRandNum = rnd.Next(pwdchars.Length);      tmpstr += pwdchars[iRandNum];    }    return tmpstr;  }  protected void Button1_Click(object sender, EventArgs e)  {    int t1 = Convert.ToInt32(TextBox1.Text);    if (t1 < 10 || t1 > 20 || t1 < 0)    {      MessageBox.Show("指定密碼失敗！");    }//判斷指定的密碼長度是否符合    else    {      string randomchars = "abcdefghijklmnopqrstuvwxyz~!@#$%^&*()_+|0123456789~!@#$%^&*()_+|ABCDEFGHIJKLMNOPQRSTUVWXYZ~!@#$%^&*()_+|";      string password = MakePassword(randomchars, Convert.ToInt32(TextBox1.Text));      TextBox2.Text = password;    }//產生隨機的密碼值  }//判斷輸入的密碼是否符合隨機產生的密碼  protected void Button2_Click(object sender, EventArgs e)  {    if (TextBox3.Text.Trim()==TextBox2.Text.Trim())    {      MessageBox.Show("成功！");      Response.Write("您現在的密碼是："+"<font color=red>"+TextBox3.Text+"</font>");    }    else    {      MessageBox.Show("失败！");    }  }  protected void TextBox1_TextChanged(object sender, EventArgs e)  {  }}

HTML代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head id="Head1" runat="server">  <title>无标题页</title></head><body bgcolor="#66ffcc">  <form id="form1" runat="server" >  <div>         <br />    <br />    <br />    <br />    <br />    <br />    <table bgcolor=SpringGreen>      <tr>        <td width="100px">    <asp:Label ID="Label1" runat="server" Text="指定密码长度(10~20之間）" Width="129px"></asp:Label></td>        <td width="159px">    <asp:TextBox ID="TextBox1" runat="server" Width="39px" OnTextChanged="TextBox1_TextChanged">10</asp:TextBox>    <asp:TextBox ID="TextBox2" runat="server" Width="195px" ReadOnly="true"></asp:TextBox></td>        <td width="103px">    <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="產生密碼" /></td>        <td width="100px">        </td>      </tr>      <tr>        <td width="100px">    <asp:Label ID="Label2" runat="server" Text="输入产生的密码"></asp:Label></td>        <td width="159px">          <asp:TextBox ID="TextBox3" runat="server" Width="261px" TextMode="Password"></asp:TextBox></td>        <td width="103px">    <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="验证" /></td>        <td width="100px">        </td>      </tr>    </table>    <br />    <br />    <br />    </div>  </form></body></html>

希望本文所述对大家C#程序设计有所帮助。

注：相关教程知识阅读请移步到c#教程频道。

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