How can I generate random alphanumeric strings in C#?

如何在C＃中生成随机的8个字符的字母数字字符串？

---

I heard LINQ is the new black, so here's my attempt using LINQ:

private static Random random = new Random();
public static string RandomString(int length)
{
    const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    return new string(Enumerable.Repeat(chars, length)
      .Select(s => s[random.Next(s.Length)]).ToArray());
}

(Note: The use of the Random class makes this unsuitable for anything security related, such as creating passwords or tokens.
Use the RNGCryptoServiceProvider class if you need a strong random number generator.)

---

var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
var stringChars = new char[8];
var random = new Random();

for (int i = 0; i < stringChars.Length; i++)
{
    stringChars[i] = chars[random.Next(chars.Length)];
}

var finalString = new String(stringChars);

Not as elegant as the Linq solution. (-:

(Note: The use of the Random class makes this unsuitable for anything security related , such as creating passwords or tokens. Use the RNGCryptoServiceProvider class if you need a strong random number generator.)

---

This implementation (found via google) looks sound to me.

Unlike some of the alternatives presented, this one is cryptographically sound .

using System.Security.Cryptography;
using System.Text;

namespace UniqueKey
{
    public class KeyGenerator
    {
        public static string GetUniqueKey(int maxSize)
        {
            char[] chars = new char[62];
            chars =
            "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890".ToCharArray();
            byte[] data = new byte[1];
            using (RNGCryptoServiceProvider crypto = new RNGCryptoServiceProvider())
            {
                crypto.GetNonZeroBytes(data);
                data = new byte[maxSize];
                crypto.GetNonZeroBytes(data);
            }
            StringBuilder result = new StringBuilder(maxSize);
            foreach (byte b in data)
            {
                result.Append(chars[b % (chars.Length)]);
            }
            return result.ToString();
        }
    }
}

Picked that one from a discussion of alternatives here

链接地址: http://www.djcxy.com/p/17718.html

上一篇: 在特定范围内使用JavaScript生成随机整数？

下一篇: 我如何在C＃中生成随机字母数字字符串？