randnum.cs

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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>
/// randnum 的摘要说明
/// </summary>
public class randnum
{
	public randnum()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}
    public string GetConnStrings()
    {
        string str2 = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        string path = ConfigurationManager.ConnectionStrings["DBPaths"].ConnectionString;
        string str4 = HttpContext.Current.Server.MapPath(path);
        return (str2 + str4 + ";");
    }

    public string randnu(int n)
    {
        string[] strArray = "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".Split(new char[] { ',' });
        string str2 = "";
        int num = -1;
        Random random = new Random();
        for (int i = 1; i < (n + 1); i++)
        {
            if (num != -1)
            {
                random = new Random((i * num) * ((int)DateTime.Now.Ticks));
            }
            int index = random.Next(0x3d);
            num = index;
            str2 = str2 + strArray[index];
        }
        return str2;
    }

}