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代码示例 {#%E4%BB%A3%E7%A0%81%E7%A4%BA%E4%BE%8B}

using System;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections.Generic;
namespace Common
{
public class RandomStringBuilderUtil
{
/// <summary>生成随机字符串</summary>
/// <param name="length">字符串的长度</param>
/// <returns></returns>
public static string Create(int length)
{
// 创建一个StringBuilder对象存储密码
StringBuilder sb = new StringBuilder();
//使用for循环把单个字符填充进StringBuilder对象里面变成14位密码字符串
for (int i = 0; i < length; i++)
{
Random random = new Random(Guid.NewGuid().GetHashCode());
//随机选择里面其中的一种字符生成
switch (random.Next(3))
{
case 0:
//调用生成生成随机数字的方法
sb.Append(createNum());
break;
                case 1:
                    //调用生成生成随机小写字母的方法
                    sb.Append(createSmallAbc());
                    break;

                case 2:
                    //调用生成生成随机大写字母的方法
                    sb.Append(createBigAbc());
                    break;
            }
        }
        return sb.ToString();
    }

    /// <summary>生成单个大写随机字母</summary>
    private static string createBigAbc()
    {
        //A-Z的 ASCII值为65-90
        Random random = new Random(Guid.NewGuid().GetHashCode());
        int num = random.Next(65, 91);
        string abc = Convert.ToChar(num).ToString();
        return abc;
    }

    /// <summary>生成单个随机数字</summary>
    private static int createNum()
    {
        Random random = new Random(Guid.NewGuid().GetHashCode());
        int num = random.Next(10);
        return num;
    }

    /// <summary>生成单个小写随机字母</summary>
    private static string createSmallAbc()
    {
        //a-z的 ASCII值为97-122
        Random random = new Random(Guid.NewGuid().GetHashCode());
        int num = random.Next(97, 123);
        string abc = Convert.ToChar(num).ToString();
        return abc;
    }
}

}

使用 {#%E4%BD%BF%E7%94%A8}

private static void Main()
{
	string s = RandomStringBuilderUtil.Create(10);
	Debug.WriteLine(s);
}