randomCode.cs
资源名称:yjal.rar [点击查看]
上传用户:shjujing
上传日期:2022-07-28
资源大小:11244k
文件大小:1k
源码类别:
Email客户端
开发平台:
Visual C++
- 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;
- /// <summary>
- /// randomCode 的摘要说明
- /// </summary>
- public class randomCode
- {
- public randomCode()
- {
- //
- // TODO: 在此处添加构造函数逻辑
- //
- }
- public string RandomNum(int n) //
- {
- string strchar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";
- string[] VcArray = strchar.Split(',');
- string VNum = ""; //
- int temp = -1; //记录上次随机数值,尽量避免产生几个一样的随机数
- //采用一个简单的算法以保证生成随机数的不同
- Random rand = new Random();
- for (int i = 1; i < n + 1; i++)
- {
- if (temp != -1)
- {
- rand = new Random(i * temp * unchecked((int)DateTime.Now.Ticks));
- }
- int t = rand.Next(61);
- if (temp != -1 && temp == t)
- {
- return RandomNum(n);
- }
- temp = t;
- VNum += VcArray[t];
- }
- return VNum;//返回生成的随机数
- }
- }