c#随机数总结,汉字,英文,数字 [转帖]
Code
private static char[] constant = { '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' };
/// <summary>
/// 得到数字加英文的随机数,参数:随机数长度,返回值:一个字符串!
/// </summary>
/// <param name="strLength"></param>
/// <returns></returns>
public string pxkt_GetCharFont(int strLength)
{
System.Text.StringBuilder newRandom = new System.Text.StringBuilder(62);
Random rd = new Random();
for (int i = 0; i < strLength; i++)
{
newRandom.Append(constant[rd.Next(62)]);
}
return newRandom.ToString();
}
/// <summary>
/// 得到英文的随机数,参数:随机数长度,返回值:一个字符串!
/// </summary>
private static char[] englishchar = { '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' };
public string GetEnglishChar(int strLength)
{
System.Text.StringBuilder newRandom = new System.Text.StringBuilder(52);
Random rd = new Random();
for (int i = 0; i < strLength; i++)
{
newRandom.Append(englishchar[rd.Next(52)]);
}
return newRandom.ToString();
}
private static char[] numchar = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
/// <summary>
/// 得到数字的随机数,参数:随机数长度,返回值:一个字符串!
/// </summary>
/// <param name="strLength"></param>
/// <returns></returns>
public string GetNumChar(int strLength)
{
System.Text.StringBuilder newRandom = new System.Text.StringBuilder(10);
Random rd = new Random();
for (int i = 0; i < strLength; i++)
{
newRandom.Append(numchar[rd.Next(10)]);
}
return newRandom.ToString();
}
/// <summary>
/// 得到中文的随机数,参数:随机数长度,返回值:一个字符串!
/// </summary>
/// <param name="strLength"></param>
/// <returns></returns>
public string GetChineseChar(int strLength)
{
System.Text.StringBuilder newRandom = new System.Text.StringBuilder();
//获取GB2312编码页(表)
System.Text.Encoding gb = System.Text.Encoding.GetEncoding("gb2312");
//调用函数产生I个随机中文汉字编码
object[] bytes = CreateRegionCode(strLength);
for (int i = 0; i < strLength; i++)
{
//根据汉字编码的字节数组解码出中文汉字
string str = gb.GetString((byte[])Convert.ChangeType(bytes[i], typeof(byte[])));
newRandom.Append(str);
}
return newRandom.ToString();
}
public static object[] CreateRegionCode(int strlength)
{
//定义一个字符串数组储存汉字编码的组成元素
string[] rBase = new String[16] { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
Random rnd = new Random();
//定义一个object数组用来
object[] bytes = new object[strlength];
/**/
/*每循环一次产生一个含两个元素的十六进制字节数组,并将其放入bject数组中
每个汉字有四个区位码组成
区位码第1位和区位码第2位作为字节数组第一个元素
区位码第3位和区位码第4位作为字节数组第二个元素
*/
for (int i = 0; i < strlength; i++)
{
//区位码第1位
int r1 = rnd.Next(11, 14);
string str_r1 = rBase[r1].Trim();
//区位码第2位
rnd = new Random(r1 * unchecked((int)DateTime.Now.Ticks) + i);//更换随机数发生器的种子避免产生重复值
int r2;
if (r1 == 13)
{
r2 = rnd.Next(0, 7);
}
else
{
r2 = rnd.Next(0, 16);
}
string str_r2 = rBase[r2].Trim();
//区位码第3位
rnd = new Random(r2 * unchecked((int)DateTime.Now.Ticks) + i);
int r3 = rnd.Next(10, 16);
string str_r3 = rBase[r3].Trim();
//区位码第4位
rnd = new Random(r3 * unchecked((int)DateTime.Now.Ticks) + i);
int r4;
if (r3 == 10)
{
r4 = rnd.Next(1, 16);
}
else if (r3 == 15)
{
r4 = rnd.Next(0, 15);
}
else
{
r4 = rnd.Next(0, 16);
}
string str_r4 = rBase[r4].Trim();
//定义两个字节变量存储产生的随机汉字区位码
byte byte1 = Convert.ToByte(str_r1 + str_r2, 16);
byte byte2 = Convert.ToByte(str_r3 + str_r4, 16);
//将两个字节变量存储在字节数组中
byte[] str_r = new byte[] { byte1, byte2 };
//将产生的一个汉字的字节数组放入object数组中
bytes.SetValue(str_r, i);
}
return bytes;
}
转自:http://hi.baidu.com/92fun/blog/item/ab8f9744b3d85c4f510ffe84.html
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