纯自用，为了拯救懒癌晚期(*´﹃｀*)

别说跨平台了，跨程序我都懒得再写一次_(:з」∠)_

发现一个bug，在程序运行足够快的情况下，GetRandomString方法会生成大量相同的数据

（现在已经添加了GetRandomSeed方法解决）

1.0版 初步发布

1.1版 添加生成随机种子，并修改方法命名规则

1.2版 新增方法，可直接填充一张表（DataSet类）

1.3版  使用using关键字

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Security.Cryptography;
using System.Data;
using System.Data.SqlClient;

namespace Nekopara
{
    public class Neko
    {
        private static string ConnectionString = ConfigurationManager.AppSettings["ConnectionString"];//从配置文件读取连接字符串

        public static int Action(string Command)//增，删，改
        {
            using (SqlConnection sql = new SqlConnection(ConnectionString))
            {
                SqlCommand cmd = new SqlCommand(Command, sql);
                sql.Open();
                int output = cmd.ExecuteNonQuery();
                return output;
            }
        }

        public static object Read(string Command)//查（首行首列）
        {
            using (SqlConnection sql = new SqlConnection(ConnectionString))
            {
                SqlCommand cmd = new SqlCommand(Command, sql);
                sql.Open();
                object output = cmd.ExecuteScalar();
                return output;
            }
        }

        public static DataSet ReadDataSet(string Command)//查（返回表）
        {
            using (SqlConnection sql = new SqlConnection(ConnectionString))
            {
                DataSet output = new DataSet();
                SqlDataAdapter da = new SqlDataAdapter(Command, sql);
                sql.Open();
                da.Fill(output);
                return output;
            }
        }

        public static string toSHA512(string strData)//SHA512加密
        {
            byte[] bytValue = System.Text.Encoding.UTF8.GetBytes(strData);
            SHA512 sha512 = new SHA512CryptoServiceProvider();
            byte[] retVal = sha512.ComputeHash(bytValue);
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < retVal.Length; i++)
            {
                sb.Append(retVal[i].ToString("x2"));
            }
            return sb.ToString();
        }

        //取指定位数随机字符串，用于向表中添加大量随机记录
        public static string GetRandomString(int n)
        {
            string s = "0123456789abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ!@#$%^&*()_+";
            string value = "";
            Random rdm = new Random(GetRandomSeed());
            while (value.Length < n)
            {
                string s1 = s[rdm.Next(0, s.Length)].ToString();
                value += s1;
            }
            return value;
        }

        //一个骰子
        public static int GetRandomSeed()
        {
            byte[] bytes = new byte[4];
            System.Security.Cryptography.RNGCryptoServiceProvider x = new System.Security.Cryptography.RNGCryptoServiceProvider();
            x.GetBytes(bytes);
            return BitConverter.ToInt32(bytes,0);
        }
    }
}

使用例子：

//增
int result = Neko.Action("insert into demo(name,passwd,id)values('root','admin','1001'");
//删
int result = Neko.Action("delete from demo where name='root'");
//改
int result = Neko.Action("update demo set passwd='123456' where name='root'");
//查
DataSet ds = Neko.ReadDataSet("select * from demo where name='root'")
//加密用户密码
string result = Neko.toSHA512("password");
//取随机字符串
string str = Neko.GetRandomString(8);
//掷骰子
int seed = Neko.GetRandomSeed();

请不要吐槽类名蟹蟹(灬ºωº灬)