本文實例講述了C#簡單生成隨機密碼的方法。分享給大家供大家參考，具體如下：
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 "長度過長！" + 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("失敗！"); } } protected void TextBox1_TextChanged(object sender, EventArgs e) { }}HTML代碼：
<%@ 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>無標題頁</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="指定密碼長度(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="輸入產生的密碼"></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="驗證" /></td> <td width="100px"> </td> </tr> </table> <br /> <br /> <br /> </div> </form></body></html>
希望本文所述對大家C#程序設計有所幫助。
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