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://HdhCmsTestw3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
<html xmlns= "http://HdhCmsTestw3.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。
dy("nrwz");