.net/c#生成随机数自定义字母和数字个数

小渣渣 · 发表于 2016-9-14 14:31:44

c#随机生成随机数，可以自定义随机生成字母和数字的个数

上面是生成8位随机数，4位数字和4位字母的例子，

代码如下：

class Program
{
static void Main(string[] args)
{
for (int i = 0; i < 10; i++)
{
string result = CreateRandom(4, 4);
Console.WriteLine(result);
}
}
/// <summary>
/// 创建随机数
/// </summary>
/// <param name="Letter">字母个数</param>
/// <param name="num">数字个数</param>
/// <returns></returns>
public static string CreateRandom(int Letter, int num)
{
string result = CreateRandomLetter(Letter) + CreateRandomNum(num);
var temp = result.OrderBy(x => Guid.NewGuid()).ToArray(); // 按一个随机值排序后组合成数组
return new string(temp);
}
/// <summary>
/// 创建字母随机数
/// </summary>
/// <param name="letter"></param>
/// <returns></returns>
private static string CreateRandomLetter(int letter)
{
string str = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
StringBuilder sb = new StringBuilder();
for (int i = 0; i < letter; i++)
{
sb.Append(str[new Random(Guid.NewGuid().GetHashCode()).Next(0, str.Length - 1)]);
}
return sb.ToString();
}
/// <summary>
/// 创建数字随机数
/// </summary>
/// <param name="num"></param>
/// <returns></returns>
private static string CreateRandomNum(int num)
{
string str = "0123456789";
StringBuilder sb = new StringBuilder();
for (int i = 0; i < num; i++)
{
sb.Append(str[new Random(Guid.NewGuid().GetHashCode()).Next(0, str.Length - 1)]);
}
return sb.ToString();
}
}

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[资料] .net/c#生成随机数自定义字母和数字个数