Question

用asp或者asp.net取随机数！

求一个asp或者是asp.net代码，能生成随机数的！就是在一个网页中我刷新一次就会显示出5位或者是6为的数字（最好让我能自己选择多少位！数字是0-9这10个数字）数字要是随机的！

Answer 1

这个简单嘛，给你写了3种：
这是asp的：
<%
n=5 '在这里更改你需要的位数
dim num1,rndnum
Randomize
Do While Len(rndnum)<n
num1=CStr(Chr((57-48)*rnd+48))
rndnum=rndnum&num1
loop
session("verifycode")=rndnum
response.Write(session("verifycode"))
%>
rndnum就是随机数，这里我意保存到session中，不影响的

这是asp.net的：
asp.net最简单
protected void Page_Load(object sender, EventArgs e)
{
Random rnd = new Random();
int n = rnd.Next(1000, 9999);
//n就是你要的随机数，如果你要5位的就将上面改成(10000,99999),6位：(100000,999999)
//这里我将n保存的cookies中
Response.Cookies["CheckCode"].Value = n.ToString();

}

下面这个是asp.net的，而且是图片验证码，我已将他保存到cookies中
protected void Page_Load(object sender, EventArgs e)
{
Random rnd = new Random();
int n = rnd.Next(1000, 9999);
Response.Cookies["CheckCode"].Value = n.ToString();
System.Drawing.Bitmap btp = new System.Drawing.Bitmap(60, 18);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(btp);
g.Clear(System.Drawing.Color.WhiteSmoke);
g.DrawString(n.ToString(), new System.Drawing.Font("宋体",14),System.Drawing.Brushes.Red, 2, 1);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
btp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
Response.ContentType = "Image/Jpeg";
Response.BinaryWrite(ms.ToArray());
}

Answer 2

asp版
调用是 RandNumber(5)或者RandNumber(6)

<%
Function RandNumber(maxLen) '生成随机密码
Dim strNew
Dim whatsNext,upper,lower,intCounter
Randomize
For intCounter = 1 To maxLen
upper = 57
lower = 48
strNew = strNew&Chr(Int((upper-lower+1)*Rnd+lower))
Next
RandNumber=strNew
End Function
%>

asp.net版
///<summary>
///产生指定长度的随机字符串
///</summary>
///<param name="Len">字符串长度</param>
///<param name="type"></param>
///<returns>返回给定长度的随机字符串</returns>
public static string RandNumber(int Len)
{
string s = "0,1,2,3,4,5,6,7,8,9";
string[] Chars = s.Split(',');
Random Rnd = new Random();
int Start = 0, End = 9;
s = "";
for (int i = 0; i < Len; i++)
{
s += Chars[Rnd.Next(Start, End)];
System.Threading.Thread.Sleep(5);//延时,避免重复
}
return s;
}

参考一下

Answer 3

asp中用rnd函数就行：

<%
randomize

dim x
x=int(rnd()*100000)

response.write(x)

%>

Answer 4

public string rand(int k)
{
Random r = new Random();
string s="10000000000";
string e="99999999999";
return r.Next(int.Parse(s.Substring(0,k)),int.Parse(e.Substring(0,k))).ToString();
}