string strchar = "1,2,3,4,5,6,7,8,9,0";
string[] VcArray = strchar.Split(',');
string VNum = "";
//记录上次随机数,以避免产生几个一样的随机数
int temp=-1;
//采用一个简单的算法以保证生成随机说
Random rand = new Random();
for (int i = 1; i < 5; i++)
{
if (temp != -1)
rand = new Random(i*temp*unchecked((int)DateTime.Now.Ticks));
int t = rand.Next(10);
temp = t;
VNum +=VcArray[t];
}
Session["Valid"] = VNum;
return VNum;//返回生成的随机数;
我不理解rand = new Random(i*temp*unchecked((int)DateTime.Now.Ticks));的作用,请帮指点一下.
谢谢/
string[] VcArray = strchar.Split(',');
string VNum = "";
//记录上次随机数,以避免产生几个一样的随机数
int temp=-1;
//采用一个简单的算法以保证生成随机说
Random rand = new Random();
for (int i = 1; i < 5; i++)
{
if (temp != -1)
rand = new Random(i*temp*unchecked((int)DateTime.Now.Ticks));
int t = rand.Next(10);
temp = t;
VNum +=VcArray[t];
}
Session["Valid"] = VNum;
return VNum;//返回生成的随机数;
我不理解rand = new Random(i*temp*unchecked((int)DateTime.Now.Ticks));的作用,请帮指点一下.
谢谢/
DateTime.Now.Ticks 取微秒然后乘以temp最终目的是建立一个数字
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