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  • 我的一类库

    查询ACCESS

            /// <summary>
            /// OleDb查询数据库返回内容
            /// </summary>
            /// <param name="sql_str"></param>
            /// <returns></returns>
            protected DataTable dlBind(string sql_str)
            {
                oCon.Open();
                OleDbCommand ps = new OleDbCommand(sql_str, oCon);
                DataTable dt = new DataTable();
                dt.Load(ps.ExecuteReader());
                oCon.Close();
                return dt;
    
            }
    

    打开文件并读取内容,保存字符到文件.

            /// <summary>
            ///  打开文件,反回字符串
            /// </summary>
            /// <param name="file_path">"SyntaxHighligher/com.html"</param>
            /// <returns></returns>
            private string openfiletext(string file_path)
            {
                StreamReader htmlreader = new StreamReader(file_path);
                return htmlreader.ReadToEnd();
    
            }
            /// <summary>
            /// 保存字符串到文件
            /// </summary>
            /// <param name="filetext"></param>
            /// <param name="file_path">"SyntaxHighligher/com.html"</param>
            private void writefiletext(string filetext,string file_path)
            {
                FileStream MyFileStream = new FileStream(file_path, FileMode.Create, FileAccess.Write);
                StreamWriter htmlWriter = new StreamWriter(MyFileStream, System.Text.Encoding.UTF8);
                htmlWriter.WriteLine(filetext);
                htmlWriter.Close();
                MyFileStream.Close();
                
            }
    

      转换人民币大写

    public static string CmycurD(double num)
            {
                string str1 = "零壹贰叁肆伍陆柒捌玖";            //0-9所对应的汉字 
                string str2 = "万仟佰拾亿仟佰拾万仟佰拾元角分"; //数字位所对应的汉字 
                string str3 = "";    //从原num值中取出的值 
                string str4 = "";    //数字的字符串形式 
                string str5 = "";  //人民币大写金额形式 
                int i;    //循环变量 
                int j;    //num的值乘以100的字符串长度 
                string ch1 = "";    //数字的汉语读法 
                string ch2 = "";    //数字位的汉字读法 
                int nzero = 0;  //用来计算连续的零值是几个 
                int temp;            //从原num值中取出的值 
    
                num = Math.Round(Math.Abs(num), 2);    //将num取绝对值并四舍五入取2位小数 
                str4 = (num * 100).ToString();        //将num乘100并转换成字符串形式 
                j = str4.Length;      //找出最高位 
                if (j > 15) { return "溢出"; }
                str2 = str2.Substring(15 - j);   //取出对应位数的str2的值。如:200.55,j为5所以str2=佰拾元角分 
    
                //循环取出每一位需要转换的值 
                for (i = 0; i < j; i++)
                {
                    str3 = str4.Substring(i, 1);          //取出需转换的某一位的值 
                    temp = Convert.ToInt32(str3);      //转换为数字 
                    if (i != (j - 3) && i != (j - 7) && i != (j - 11) && i != (j - 15))
                    {
                        //当所取位数不为元、万、亿、万亿上的数字时  
                        if (str3 == "0")
                        {
                            ch1 = "";
                            ch2 = "";
                            nzero = nzero + 1;
                            if (i == (j - 2))//如果有"0角"则不显示零
                            {
                                nzero = 0;
                            }
    
                        }
                        else
                        {
                            if (str3 != "0" && nzero != 0) //如果是连续的0时
                            {
    
                                ch1 = "零" + str1.Substring(temp * 1, 1);
                                ch2 = str2.Substring(i, 1);
                                nzero = 0;
                                
                            }
                            else
                            {
                                ch1 = str1.Substring(temp * 1, 1);
                                ch2 = str2.Substring(i, 1);
                                nzero = 0;
                            }
                        }
                    }
                    else
                    {
                        //该位是万亿,亿,万,元位等关键位 
                        if (str3 != "0" && nzero != 0)//前面有零的除0之外的数
                        {
                            ch1 = "零" + str1.Substring(temp * 1, 1);
                            ch2 = str2.Substring(i, 1);
                            nzero = 0;
                        }
                        else //前面没零或 str3=0
                        {
                            if (str3 != "0" && nzero == 0) //值不是0时 前面没零只转换字符
                            {
                                ch1 = str1.Substring(temp * 1, 1);
                                ch2 = str2.Substring(i, 1);
                                nzero = 0;
                            }
                            else
                            {
                                if (str3 == "0" && nzero >= 3)
                                {
                                    ch1 = "";
                                    ch2 = "";
                                    nzero = nzero + 1;
                                }
                                else
                                {
                                    if (j >= 11)
                                    {
                                        ch1 = "";
                                        nzero = nzero + 1;
                                    }
                                    else
                                    {
                                        ch1 = "";
                                        ch2 = str2.Substring(i, 1);
                                        nzero = nzero + 1;
                                    }
                                }
                            }
                        }
                    }
                    if (i == (j - 11) || i == (j - 3) || i == (j - 7))
                    {
                        //如果该位是亿位万元或元位,则必须写上 
                        ch2 = str2.Substring(i, 1);
                    }
                    str5 = str5 + ch1 + ch2;
    
                    if (i == j - 1 && str3 == "0")
                    {
                        //最后一位(分)为0时,加上“整” 
                        str5 = str5 + '整';
                    }
                }
                if (num == 0)
                {
                    str5 = "零元整";
                }
                return str5;
            }
    
            /**/
            /// <summary> 
            /// 一个重载,将字符串先转换成数字在调用CmycurD(decimal num) 
            /// </summary> 
            /// <param name="num">用户输入的金额,字符串形式未转成decimal</param> 
            /// <returns></returns> 
            public static string CmycurD(string numstr)
            {
                try
                {
                    double num = Convert.ToDouble(numstr);
                    return CmycurD(num);
                }
                catch
                {
                    return "非数字形式!";
                }
            }
    

      获取NTP的时间

    static void Main(string[] args)
            {
               TimeSpan NTPtimeSpan = GetNetworkTime().Subtract(System.DateTime.Now); //返回本地与远程的时间间隔差
                Console.WriteLine(DateTime.Now.Add(NTPtimeSpan));                    //通过计算得出正确的本地时间
                Console.ReadKey();            
            }
            public static DateTime GetNetworkTime()
            {
                //时间服务器地址
                const string ntpServer = "time.asia.apple.com";
                var addresses = Dns.GetHostEntry(ntpServer).AddressList;
    
                // NTP message size - 16 bytes of the digest (RFC 2030)
                var ntpData = new byte[48];
    
                //Setting the Leap Indicator, Version Number and Mode values
                ntpData[0] = 0x1B; //LI = 0 (no warning), VN = 3 (IPv4 only), Mode = 3 (Client Mode)            
    
                //The UDP port number assigned to NTP is 123
                var ipEndPoint = new IPEndPoint(addresses[0], 123);
                //NTP uses UDP
                var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
    
                socket.Connect(ipEndPoint);
    
                //Stops code hang if NTP is blocked
                socket.ReceiveTimeout = 3000;
    
                socket.Send(ntpData);
                socket.Receive(ntpData);
                socket.Close();
    
                //Offset to get to the "Transmit Timestamp" field (time at which the reply
                //departed the server for the client, in 64-bit timestamp format."
                const byte serverReplyTime = 40;
    
                //Get the seconds part
                ulong intPart = BitConverter.ToUInt32(ntpData, serverReplyTime);
    
                //Get the seconds fraction
                ulong fractPart = BitConverter.ToUInt32(ntpData, serverReplyTime + 4);
    
                //Convert From big-endian to little-endian
                intPart = SwapEndianness(intPart);
                fractPart = SwapEndianness(fractPart);
    
                var milliseconds = (intPart * 1000) + ((fractPart * 1000) / 0x100000000L);
    
                //**UTC** time
                var networkDateTime = (new DateTime(1900, 1, 1, 0, 0, 0, DateTimeKind.Utc)).AddMilliseconds((long)milliseconds);
    
                return networkDateTime.ToLocalTime();
            }
    
            // stackoverflow.com/a/3294698/162671
            static uint SwapEndianness(ulong x)
            {
                return (uint)(((x & 0x000000ff) << 24) +
                ((x & 0x0000ff00) << 8) +
                ((x & 0x00ff0000) >> 8) +
                ((x & 0xff000000) >> 24));
            }
    获取NTP时间

     打开文本的

     private StreamReader OpenFile(string fileName)
            {
                if(File.Exists(fileName))
                {
                    return new StreamReader(fileName);
                }
                return null;
            }
    
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  • 原文地址:https://www.cnblogs.com/praybb/p/5546858.html
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