using System;
using System.Data;
using System.Web;
using System.Drawing;
using System.Drawing.Imaging;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Net.Mail;
using System.Net;
using LitJson;
using Microsoft.AspNetCore.Http;
using ThoughtWorks.QRCode.Codec;
using System.Linq;
using System.IO;
using SkiaSharp.QrCode;
using SkiaSharp;

namespace Common
{
    public class Function
    {

        /// <summary>
        /// hmacSha1算法加密（生成长度40）
        /// </summary>
        /// <param name="encryptText">加密明文</param>
        /// <param name="encryptKey">加密密钥</param>
        /// <returns></returns>
        public static string hmacSha1(string encryptText, string encryptKey)
        {
            HMACSHA1 myHMACSHA1 = new HMACSHA1(Encoding.UTF8.GetBytes(encryptKey));
            byte[] RstRes = myHMACSHA1.ComputeHash(Encoding.UTF8.GetBytes(encryptText));

            StringBuilder EnText = new StringBuilder();
            foreach (byte Byte in RstRes)
            {
                EnText.AppendFormat("{0:x2}", Byte);
            }
            return EnText.ToString();
        }

        public static string hmacmd5(string encryptText, string encryptKey)
        {
            HMACMD5 myHMACSHA1 = new HMACMD5(Encoding.UTF8.GetBytes(encryptKey));
            byte[] RstRes = myHMACSHA1.ComputeHash(Encoding.UTF8.GetBytes(encryptText));

            StringBuilder EnText = new StringBuilder();
            foreach (byte Byte in RstRes)
            {
                EnText.AppendFormat("{0:x2}", Byte);
            }
            return EnText.ToString();
        }


        /// <summary>
        /// MD5 32位加密字符串
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string MD5_32(string str)
        {
            string cl = str + "@$1212#";
            string pwd = "";
            MD5 md5 = MD5.Create();//实例化一个md5对像
            // 加密后是一个字节类型的数组，这里要注意编码UTF8/Unicode等的选择　
            byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(cl));
            // 通过使用循环，将字节类型的数组转换为字符串，此字符串是常规字符格式化所得
            for (int i = 0; i < s.Length; i++)
            {
                // 将得到的字符串使用十六进制类型格式。格式后的字符是小写的字母，如果使用大写（X）则格式后的字符是大写字符 
                pwd = pwd + s[i].ToString("X").ToLower().PadLeft(2, '0');
            }
            return pwd;
        }

        public static string MD532(string str)
        {
            string cl = str;
            string pwd = "";
            MD5 md5 = MD5.Create();//实例化一个md5对像
            // 加密后是一个字节类型的数组，这里要注意编码UTF8/Unicode等的选择　
            byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(cl));
            // 通过使用循环，将字节类型的数组转换为字符串，此字符串是常规字符格式化所得
            for (int i = 0; i < s.Length; i++)
            {
                // 将得到的字符串使用十六进制类型格式。格式后的字符是小写的字母，如果使用大写（X）则格式后的字符是大写字符 
                pwd = pwd + s[i].ToString("X").ToLower().PadLeft(2, '0');
            }
            return pwd;
        }
        /// <summary>
        /// 获取MD5值
        /// </summary>
        /// <param name="str">加密的字符串</param>
        /// <returns>返回MD5值</returns>
        public static string MD5_16(string str)
        {
            return MD5_32(str).Substring(8, 16);
        }
        /// <summary>
        /// 写日志（错误报告）
        /// </summary>
        /// <param name="str"></param>
        public static void WriteLog(string str)
        {
            try
            {
                string path = getPath("/log/message/" + DateTime.Now.Year.ToString() + "/" + DateTime.Now.Month.ToString() + "/" + DateTime.Now.Day.ToString() + "/");
                if (!Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                }
                StreamWriter sw = File.AppendText(path + "content.log");
                sw.WriteLine(str);
                sw.Flush();
                sw.Dispose();
            }
            catch
            { }
        }
        /// <summary>
        /// 写日志（错误报告）
        /// </summary>
        /// <param name="str"></param>
        public static void WriteLog(string str, string filename)
        {
            try
            {
                string path = getPath("/log/" + filename + "/" + DateTime.Now.Year.ToString() + "/" + DateTime.Now.Month.ToString() + "/" + DateTime.Now.Day.ToString() + "/");
                if (!Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                }
                StreamWriter sw = File.AppendText(path + "content.log");
                sw.WriteLine(str);
                sw.Flush();
                sw.Dispose();
            }
            catch
            { }
        }

        public static void WriteLog(string path_str, string file_name, string page_content)
        {
            try
            {
                string path = getPath(path_str);
                if (!Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                }
                StreamWriter sw = File.AppendText(path + "/" + file_name);
                sw.WriteLine(page_content);
                sw.Flush();
                sw.Dispose();
            }
            catch
            { }
        }

        /// <summary>
        /// 过滤html代码
        /// </summary>
        /// <param name="Htmlstring"></param>
        public static string NoHTML(string Htmlstring) //去除HTML标记
        {
            if (Htmlstring == null || Htmlstring == string.Empty)
            {
                return "";
            }
            Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
            //Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&.*?;", "", RegexOptions.IgnoreCase);

            Htmlstring = Htmlstring.Replace("<", "〈");
            Htmlstring = Htmlstring.Replace(">", "〉");
            //Htmlstring = Htmlstring.Replace("\r\n", "");
            //Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

            return Htmlstring;
        }

        public static bool IsIncludeChinese(string str)
        {
            Regex r = new Regex(@"[\u4E00-\u9FA5]", RegexOptions.IgnoreCase);
            if (r.IsMatch(str))
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        public static bool IsInt(string numberString)
        {
            if (string.IsNullOrEmpty(numberString))
            {
                return false;
            }
            Regex rCode = new Regex("^\\d+$");
            if (!rCode.IsMatch(numberString))
            {
                return false;
            }
            else
            {
                return true;
            }
        }

        public static string CheckInt(string numberString)
        {
            if (string.IsNullOrEmpty(numberString))
            {
                return "0";
            }
            Regex rCode = new Regex("^\\d+$");
            if (!rCode.IsMatch(numberString))
            {
                return "0";
            }
            else
            {
                return numberString;
            }
        }

        public static DateTime CheckDateTime(string numberString)
        {
            if (string.IsNullOrEmpty(numberString))
            {
                return DateTime.Now;
            }
            DateTime result;
            if (DateTime.TryParse(numberString, out result))
            {
                return result;
            }
            else
            {
                return DateTime.Now;
            }
        }

        public static bool ChkDateTime(string numberString)
        {
            if (string.IsNullOrEmpty(numberString))
            {
                return false;
            }
            DateTime result;
            if (DateTime.TryParse(numberString, out result))
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        public static string CheckNull(string numberString)
        {
            if (string.IsNullOrEmpty(numberString))
            {
                return "";
            }
            else
            {
                return numberString;
            }
        }

        public static string CheckUrl(string str)
        {
            if (str == null || str == string.Empty)
            {
                return "";
            }
            Regex rCode = new Regex(@"((http|ftp|https)://)(([a-zA-Z0-9\._-]+\.[a-zA-Z]{2,6})|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))(:[0-9]{1,4})*(/[a-zA-Z0-9\&%_\./-~-]*)?");
            if (!rCode.IsMatch(str))
            {
                return "";
            }
            else
            {
                return str;
            }
        }

        public static string CheckEmail(string str)
        {
            if (str == null || str == string.Empty)
            {
                return "";
            }
            Regex rCode = new Regex(@"^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$");
            if (!rCode.IsMatch(str))
            {
                return "";
            }
            else
            {
                return str;
            }
        }

        public static string CheckMobile(string str)
        {
            if (str == null || str == string.Empty)
            {
                return "";
            }
            Regex rCode = new Regex(@"^1[3456789]\d{9}$");
            if (!rCode.IsMatch(str))
            {
                return "";
            }
            else
            {
                return str;
            }
        }

        public static string CheckIdCard(string str)
        {
            if (str == null || str == string.Empty)
            {
                return "";
            }
            Regex rCode = new Regex(@"^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$|^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}([0-9]|X)$");
            if (!rCode.IsMatch(str))
            {
                return "";
            }
            else
            {
                return str;
            }
        }

        public static bool IsNum(string numberString)
        {
            if (string.IsNullOrEmpty(numberString))
            {
                return false;
            }
            Regex rCode = new Regex(@"^\d+(\.\d+)?$");
            if (!rCode.IsMatch(numberString))
            {
                return false;
            }
            else
            {
                return true;
            }
        }

        public static string CheckNum(string numberString)
        {
            if (string.IsNullOrEmpty(numberString))
            {
                return "0";
            }
            Regex rCode = new Regex(@"^\d+(\.\d+)?$");
            if (!rCode.IsMatch(numberString))
            {
                return "0";
            }
            else
            {
                return numberString;
            }
        }

        public static string CheckString(string str)
        {
            if (string.IsNullOrEmpty(str))
            {
                return "";
            }
            str = str.Replace("'", "&acute;");
            str = str.Replace("\"", "&quot;");
            //str = str.Replace(" ", "&nbsp;");
            str = str.Replace("<", "&lt;");
            str = str.Replace(">", "&gt;");
            str = str.Replace("(", "（");
            str = str.Replace(")", "）");
            str = ToDBC(str);
            return str;
        }

        public static string unCheckString(string str)
        {
            if (str == null || str == string.Empty)
            {
                return "";
            }
            str = str.Replace("&acute;", "'");
            str = str.Replace("&quot;", "\"");
            //str = str.Replace("&nbsp;", " ");
            str = str.Replace("&lt;", "<");
            str = str.Replace("&gt;", ">");
            str = str.Replace("（", "(");
            str = str.Replace("）", ")");
            return str;
        }

        public static string CheckString2(string str)
        {
            if (str == null || str == string.Empty)
            {
                return "";
            }
            str = ToDBC(str);
            str = Regex.Replace(str, @"<script.*?>[\s\S]*?</script>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<script.*?>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<object.*?>[\s\S]*?</object>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<object.*?>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<iframe.*?>[\s\S]*?</iframe>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<frameset.*?>[\s\S]*?</frameset>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<frameset.*?>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<frame.*?>[\s\S]*?</frame>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<frame.*?>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<form.*?>[\s\S]*?</form>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<input.*?>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<select.*?>[\s\S]*?</select>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<textarea.*?>[\s\S]*?</textarea>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<button.*?>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<noframes.*?>[\s\S]*?</noframes>", "", RegexOptions.IgnoreCase);
            str = Regex.Replace(str, @"<noframes.*?>", "", RegexOptions.IgnoreCase);
            return str;
        }

        public static string GetSession(HttpContext context, string strName)
        {
            var value = context.Session.GetString(strName);
            if (string.IsNullOrEmpty(value))
            {
                value = "";
            }
            return value;
        }

        public static void WriteSession(HttpContext context, string strName, string strValue)
        {
            context.Session.SetString(strName, strValue);
        }

        public static void DelSession(HttpContext context, string strName)
        {
            context.Session.Remove(strName);
        }

        public static string rootIndex = System.AppDomain.CurrentDomain.BaseDirectory;
        private static string Read(string absoluteFileLocation)
        {
            string result = "";
            if (System.IO.File.Exists(absoluteFileLocation))
            {
                using (FileStream fs = new FileStream(absoluteFileLocation, FileMode.Open, FileAccess.Read))
                {
                    using (StreamReader sr = new StreamReader(fs, System.Text.Encoding.UTF8))
                    {
                        try
                        {
                            result = sr.ReadToEnd();
                            //dbconn.InsertCache(absoluteFileLocation, result, 30);
                        }
                        catch
                        { }
                    }
                }
            }
            return result;
        }

        public static string getPath(string path_str)
        {
            string result = AppContext.BaseDirectory + path_str;
            return result;
        }

        public static string ReadInstance(string path_str)
        {
            //string path = System.IO.Path.Combine(rootIndex, path_str).Replace('/', System.IO.Path.DirectorySeparatorChar);
            string path = getPath(path_str);
            string content = "";
            content = Read(path);
            return content;
        }
        public static string ReadInstanceNoAuth(string path_str)
        {
            //string path = System.IO.Path.Combine(rootIndex, path_str).Replace('/', System.IO.Path.DirectorySeparatorChar);
            string path = getPath(path_str);
            string content = "";
            content = Read(path);
            return content;
        }

        public static string ReadInstanceByFull(string path_str)
        {
            string content = "";
            content = Read(path_str);
            return content;
        }

        public static void WritePage(string path_str, string file_name, string page_content)
        {
            try
            {
                string path = getPath(path_str);
                if (!Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                }
                Encoding nobom = new UTF8Encoding(false, false);
                StreamWriter sw = new StreamWriter(path + "/" + file_name, false, nobom);
                sw.Write(page_content);
                sw.Flush();
                sw.Dispose();
            }
            catch
            { }
        }

        public static void WritePageFullPath(string path_str, string file_name, string page_content)
        {
            try
            {
                if (!Directory.Exists(path_str))
                {
                    Directory.CreateDirectory(path_str);
                }
                Encoding nobom = new UTF8Encoding(false, false);
                StreamWriter sw = new StreamWriter(path_str + file_name, false, nobom);
                sw.Write(page_content);
                sw.Flush();
                sw.Dispose();
            }
            catch
            { }
        }

        public static void send_email(string mailTitle, string mailTo, string mailContent, string file_path, string host, int port, string username, string pwd, string displayname)
        {
            try
            {
                MailAddress from = new MailAddress(username, displayname); //邮件的发件人
                MailMessage mail = new MailMessage();
                //设置邮件的标题
                mail.Subject = mailTitle;
                mail.SubjectEncoding = Encoding.UTF8;
                //设置邮件的发件人
                //Pass:如果不想显示自己的邮箱地址，这里可以填符合mail格式的任意名称，真正发mail的用户不在这里设定，这个仅仅只做显示用
                mail.From = from;
                //设置邮件的收件人
                string address = "";
                string displayName = "";
                /**/
                /*  这里这样写是因为可能发给多个联系人，每个地址用 ; 号隔开
                一般从地址簿中直接选择联系人的时候格式都会是 ：用户名1 < mail1 >; 用户名2 < mail 2>; 
                因此就有了下面一段逻辑不太好的代码
                如果永远都只需要发给一个收件人那么就简单了 mail.To.Add("收件人mail");
                */
                string[] mailNames = (mailTo + ";").Split(';');
                foreach (string name in mailNames)
                {
                    if (name != string.Empty)
                    {
                        if (name.IndexOf('<') > 0)
                        {
                            displayName = name.Substring(0, name.IndexOf('<'));
                            address = name.Substring(name.IndexOf('<') + 1).Replace('>', ' ');
                        }
                        else
                        {
                            displayName = string.Empty;
                            address = name.Substring(name.IndexOf('<') + 1).Replace('>', ' ');
                        }
                        mail.To.Add(new MailAddress(address, displayName));
                    }
                }

                //设置邮件的抄送收件人
                //这个就简单多了，如果不想快点下岗重要文件还是CC一份给领导比较好
                //mail.CC.Add(new MailAddress("Manage@hotmail.com", "尊敬的领导"));

                //设置邮件的内容
                mail.Body = mailContent;
                //设置邮件的格式
                mail.BodyEncoding = Encoding.UTF8;
                mail.IsBodyHtml = true;
                //设置邮件的发送级别
                mail.Priority = MailPriority.Normal;
                //设置邮件的附件，将在客户端选择的附件先上传到服务器保存一个，然后加入到mail中
                //string fileName = file_path;
                //fileName = "D:/UpFile/" + fileName.Substring(fileName.LastIndexOf("/") + 1);
                //txtUpFile.PostedFile.SaveAs(fileName); // 将文件保存至服务器
                //mail.Attachments.Add(new Attachment(fileName));
                mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;
                SmtpClient client = new SmtpClient();
                //设置用于 SMTP 事务的主机的名称，填IP地址也可以了
                //client.Host = "smtp.163.com";
                client.Host = host;
                //设置用于 SMTP 事务的端口，默认的是 25
                //client.Port = 25;
                client.Port = port;
                client.UseDefaultCredentials = false;
                client.EnableSsl = true;
                //这里才是真正的邮箱登陆名和密码，比如我的邮箱地址是 hbgx@hotmail， 我的用户名为 hbgx ，我的密码是 xgbh
                client.Credentials = new System.Net.NetworkCredential(username, pwd);
                client.DeliveryMethod = SmtpDeliveryMethod.Network;
                client.Send(mail);
            }
            catch (Exception ex)
            {
                Function.WriteLog(ex.ToString());
            }
        }

        public static string GetWebRequest(string url)
        {
            return GetWebRequest(url, new Dictionary<string, string>());
        }

        public static string GetWebRequest(string url, Dictionary<string, string> header)
        {
            string result = "";
            try
            {
                HttpWebRequest webReq = (HttpWebRequest)HttpWebRequest.Create(url);
                webReq.Method = "GET";
                webReq.KeepAlive = true;
                webReq.Timeout = 1200000;
                webReq.ContentType = "text/html";//application/x-www-form-urlencoded
                if (header.Count > 0)
                {
                    foreach (string key in header.Keys)
                    {
                        webReq.Headers.Add(key, header[key]);
                    }
                }
                webReq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)";
                using (HttpWebResponse response = (HttpWebResponse)webReq.GetResponse())
                {
                    using (StreamReader reader = new StreamReader(response.GetResponseStream()))
                    {
                        result = reader.ReadToEnd();
                        //function.WriteLog(context.Request.QueryString["mobile"] + "  " + reader.ReadToEnd());
                    }
                    if (response != null)
                        response.Close();
                }
            }
            catch (Exception ex)
            {
                result = ex.ToString();
            }
            return result;
        }

        public static string get_Random(int num)
        {
            string[] str = new string[num];
            string serverCode = "";
            //生成随机生成器 
            Random random = new Random(GetRandomSeed());
            for (int i = 0; i < num; i++)
            {
                str[i] = random.Next(10).ToString().Substring(0, 1);
            }
            foreach (string s in str)
            {
                serverCode += s;
            }
            return serverCode;
        }

        public static int get_Random(int min, int max)
        {
            int serverCode = 0;
            Random random = new Random(GetRandomSeed());
            serverCode = random.Next(max - min) + min;
            return serverCode;
        }

        public static string get_Random_string(int count)
        {
            string str = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
            string result = "";
            for (int i = 0; i < count; i++)
            {
                Random r = new Random(GetRandomSeed());
                int serverCode = r.Next(str.Length - 0) + 0;
                result += str.Substring(serverCode, 1);
            }
            return result;
        }

        public static int GetRandomSeed()
        {
            //字节数组，用于存储
            byte[] bytes = new byte[4];
            //创建加密服务，实现加密随机数生成器
            System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider();
            //加密数据存入字节数组
            rng.GetBytes(bytes);
            //转成整型数据返回，作为随机数生成种子
            return BitConverter.ToInt32(bytes, 0);
        }

        public static string get_weekday(DateTime date)
        {
            string[] week = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };
            return week[(int)date.DayOfWeek];
        }

        public static string get_substr(string s, int length)
        {
            byte[] bytes = System.Text.Encoding.Unicode.GetBytes(s);
            int n = 0;  //  表示当前的字节数
            int i = 0;  //  要截取的字节数
            for (; i < bytes.GetLength(0) && n < length; i++)
            {
                //  偶数位置，如0、2、4等，为UCS2编码中两个字节的第一个字节
                if (i % 2 == 0)
                {
                    n++;      //  在UCS2第一个字节时n加1
                }
                else
                {
                    //  当UCS2编码的第二个字节大于0时，该UCS2字符为汉字，一个汉字算两个字节
                    if (bytes[i] > 0)
                    {
                        n++;
                    }
                }
            }
            //  如果i为奇数时，处理成偶数
            if (i % 2 == 1)
            {
                //  该UCS2字符是汉字时，去掉这个截一半的汉字 
                if (bytes[i] > 0)
                    i = i - 1;
                //  该UCS2字符是字母或数字，则保留该字符
                else
                    i = i + 1;
            }
            return System.Text.Encoding.Unicode.GetString(bytes, 0, i);
        }

        public static DateTime ConvertIntDateTime(double d)
        {
            DateTime time = DateTime.MinValue;
            DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
            time = startTime.AddSeconds(d);
            return time;
        }

        public static DateTime ConvertIntDateTimeMini(long TimeStamp)
        {
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1)); // 当地时区
            return startTime.AddTicks(TimeStamp * 10000);
        }

        public static int ConvertDateTimeInt(DateTime time)
        {
            double intResult = 0;
            DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
            TimeSpan ts = time - startTime;
            intResult = Math.Round(ts.TotalSeconds, 0);
            return int.Parse(intResult.ToString());
        }

        public static long GetCurTimestamp()
        {
            var ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
            long times = Convert.ToInt64(ts.TotalMilliseconds);
            return times;
        }

        public static DateTime checkDateTimeNull(DateTime? datetime)
        {
            if (datetime != null)
            {
                return datetime.Value;
            }
            return DateTime.Now;
        }

        public static bool IsDate(string datetime)
        {
            DateTime check = DateTime.Now;
            return DateTime.TryParse(datetime + " 00:00:00", out check);
        }

        public static bool IsDateTime(string datetime)
        {
            DateTime check = DateTime.Now;
            return DateTime.TryParse(datetime, out check);
        }

        /// <summary>  
        /// 获取时间戳  
        /// </summary>  
        /// <returns></returns>  
        public static string getTimeStamp()
        {
            TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
            return Convert.ToInt64(ts.TotalSeconds).ToString();
        }

        public static string get_timespan(DateTime s, string show_type)
        {
            string result = get_timespan(s, DateTime.Now, show_type);
            return result;
        }

        public static string get_timespan(DateTime s, DateTime e, string show_type)
        {
            string result = "";
            if (e > s)
            {
                int total = 0;
                TimeSpan ts = e - s;
                switch (show_type)
                {
                    case "d":
                        result = ts.Days.ToString() + "天";
                        break;
                    case "h":
                        if (ts.Days > 0)
                        {
                            total += ts.Days * 24;
                        }
                        total += ts.Hours;
                        result = total.ToString() + "小时";
                        break;
                    case "m":
                        if (ts.Days > 0)
                        {
                            total += ts.Days * 24 * 60;
                        }
                        if (ts.Hours > 0)
                        {
                            total += ts.Hours * 60;
                        }
                        total += ts.Hours;
                        result = total.ToString() + "分钟";
                        break;
                    case "s":
                        if (ts.Days > 0)
                        {
                            total += ts.Days * 24 * 60 * 60;
                        }
                        if (ts.Hours > 0)
                        {
                            total += ts.Hours * 60 * 60;
                        }
                        if (ts.Minutes > 0)
                        {
                            total += ts.Hours * 60;
                        }
                        total += ts.Hours;
                        result = total.ToString() + "秒";
                        break;
                    case "time":
                        if (ts.Days > 1)
                        {
                            result = s.ToString("yyyy-MM-dd");
                        }
                        else
                        {
                            if (ts.Days > 0)
                            {
                                result += ts.Days + "天";
                            }
                            if (ts.Hours > 0)
                            {
                                result += ts.Hours + "小时";
                            }
                            if (ts.Minutes > 0)
                            {
                                result += ts.Minutes + "分钟";
                            }
                            if (string.IsNullOrEmpty(result))
                            {
                                result = "刚刚";
                            }
                            else
                            {
                                result += "前";
                            }
                        }
                        break;
                    default: break;
                }
            }
            return result;
        }

        // 半角转全角
        public static string ToSBC(string input)
        {
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 32)
                {
                    c[i] = (char)12288;
                    continue;
                }
                if (c[i] < 127)
                    c[i] = (char)(c[i] + 65248);
            }
            return new string(c);
        }

        // 全角转半角
        public static string ToDBC(string input)
        {
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 12288)
                {
                    c[i] = (char)32;
                    continue;
                }
                if (c[i] > 65280 && c[i] < 65375)
                    c[i] = (char)(c[i] - 65248);
            }
            return new string(c);
        }

        public static string PostWebRequest(string postUrl, string paramData, string ContentType = "application/x-www-form-urlencoded")
        {
            //return PostWebRequest(postUrl, paramData, new Dictionary<string, string>());
            string ret = string.Empty;
            try
            {
                byte[] postData = Encoding.UTF8.GetBytes(paramData);
                // 设置提交的相关参数 
                HttpWebRequest request = WebRequest.Create(postUrl) as HttpWebRequest;
                Encoding myEncoding = Encoding.UTF8;
                request.Method = "POST";
                request.KeepAlive = false;
                request.AllowAutoRedirect = true;
                request.ContentType = ContentType;
                //request.ContentType = "multipart/form-data; boundary=" + boundary;
                request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR  3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";
                request.ContentLength = postData.Length;

                // 提交请求数据 
                System.IO.Stream outputStream = request.GetRequestStream();
                outputStream.Write(postData, 0, postData.Length);
                outputStream.Close();

                HttpWebResponse response;
                Stream responseStream;
                StreamReader reader;
                string srcString;
                response = request.GetResponse() as HttpWebResponse;
                responseStream = response.GetResponseStream();
                reader = new System.IO.StreamReader(responseStream, Encoding.UTF8);
                srcString = reader.ReadToEnd();
                ret = srcString;   //返回值赋值
                reader.Close();
            }
            catch (Exception ex)
            {
                ret = "fail";
                WriteLog(ex.ToString(), "PostWebRequest");
            }
            return ret;
        }

        public static string PostWebRequest(string postUrl, string paramData, Dictionary<string, string> header, string ContentType = "application/x-www-form-urlencoded")
        {
            //return PostWebRequest(postUrl, paramData, new Dictionary<string, string>());
            string ret = string.Empty;
            try
            {
                byte[] postData = Encoding.UTF8.GetBytes(paramData);
                // 设置提交的相关参数 
                HttpWebRequest request = WebRequest.Create(postUrl) as HttpWebRequest;
                Encoding myEncoding = Encoding.UTF8;
                request.Method = "POST";
                request.KeepAlive = false;
                request.AllowAutoRedirect = true;
                request.ContentType = ContentType;
                //request.ContentType = "multipart/form-data; boundary=" + boundary;
                request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR  3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";
                request.ContentLength = postData.Length;
                if (header.Count > 0)
                {
                    foreach (string key in header.Keys)
                    {
                        request.Headers.Add(key, header[key]);
                    }
                }

                // 提交请求数据 
                System.IO.Stream outputStream = request.GetRequestStream();
                outputStream.Write(postData, 0, postData.Length);
                outputStream.Close();

                HttpWebResponse response;
                Stream responseStream;
                StreamReader reader;
                string srcString;
                response = request.GetResponse() as HttpWebResponse;
                responseStream = response.GetResponseStream();
                reader = new System.IO.StreamReader(responseStream, Encoding.UTF8);
                srcString = reader.ReadToEnd();
                ret = srcString;   //返回值赋值
                reader.Close();
            }
            catch (Exception ex)
            {
                ret = "fail";
                WriteLog(ex.ToString(), "PostWebRequest");
            }
            return ret;
        }

        /// <summary>
        /// 从ftp服务器上获得文件夹列表
        /// </summary>
        /// <param name="RequedstPath">服务器下的相对路径</param>
        /// <returns></returns>
        public static List<string> GetFtpDirctoryList(string path, string username, string password)
        {
            List<string> strs = new List<string>();
            try
            {
                string uri = path;   //目标路径 path为服务器地址
                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                // ftp用户名和密码
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
 
                string line = reader.ReadLine();
                while (line != null)
                {
                    if (line.Contains("<DIR>"))
                    {
                        string msg = line.Substring(line.LastIndexOf("<DIR>") + 5).Trim();
                        strs.Add(msg);
                    }
                    line = reader.ReadLine();
                }
                reader.Close();
                response.Close();
                return strs;
            }
            catch (Exception ex)
            {
                Function.WriteLog(DateTime.Now + ":" + ex.ToString(), "从ftp服务器上获得文件夹列表异常");
            }
            return strs;
        }
 
        /// <summary>
        /// 从ftp服务器上获得文件列表
        /// </summary>
        /// <param name="RequedstPath">服务器下的相对路径</param>
        /// <returns></returns>
        public static List<string> GetFtpFileList(string path, string username, string password)
        {
            List<string> strs = new List<string>();
            try
            {
                string uri = path;   //目标路径 path为服务器地址
                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                // ftp用户名和密码
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
 
                string line = reader.ReadLine();
                while (line != null)
                {
                    if (!line.Contains("<DIR>"))
                    {
                        string msg = line.Substring(39).Trim();
                        strs.Add(msg);
                    }
                    line = reader.ReadLine();
                }
                reader.Close();
                response.Close();
                return strs;
            }
            catch (Exception ex)
            {
                Function.WriteLog(DateTime.Now + ":" + ex.ToString(), "从ftp服务器上获得文件列表异常");
            }
            return strs;
        }
        //从ftp服务器上下载文件
        public static string FtpDownload(string path, string fileName, string username, string password)
        {
            FtpWebRequest reqFTP;
            string savePath = "";
            try
            {
                string filePath = getPath("/FtpDownloadFile/" + fileName);
                FileStream outputStream = new FileStream(filePath, FileMode.Create);
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + fileName));
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(username, password);
                reqFTP.UsePassive = false;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];
                readCount = ftpStream.Read(buffer, 0, bufferSize);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                ftpStream.Close();
                outputStream.Close();
                response.Close();
                savePath = "/FtpDownloadFile/" + fileName;
            }
            catch (Exception ex)
            {
                Function.WriteLog(DateTime.Now + ":" + ex.ToString(), "从ftp服务器上下载文件异常");
            }
            return savePath;
        } 

        public static string base64StringToImage(string base64String, string path, string filename)
        {
            string fullpath = getPath(path);
            if (!System.IO.Directory.Exists(fullpath))
            {
                System.IO.Directory.CreateDirectory(fullpath);
            }
            byte[] arr = Convert.FromBase64String(base64String);
            System.IO.File.WriteAllBytes(fullpath + filename, arr);
            return path + filename;
        }

        public static String BuildQueryString(SortedList<String, String> kvp)
        {
            return String.Join("&", kvp.Select(item => String.Format("{0}={1}", item.Key.Trim(), item.Value)).ToArray());
        }

        public static string CreateQRCode2(string content, string name, string myPath, int scale = 600)
        {
            //判断文件路径是否存在，不存在则创建文件夹 
            string path = getPath("/" + myPath + "/");
            try
            {
                if (!System.IO.Directory.Exists(path))
                {
                    System.IO.Directory.CreateDirectory(path);//不存在就创建目录 
                }
                var savePath = path + name + ".png";

                using var generator = new QRCodeGenerator();
                var qr = generator.CreateQrCode(content, ECCLevel.H);
                var info = new SKImageInfo(scale, scale);
                using var surface = SKSurface.Create(info);
                var canvas = surface.Canvas;
                canvas.Render(qr, info.Width, info.Height);
                using var image = surface.Snapshot();
                using var data = image.Encode(SKEncodedImageFormat.Png, 100);
                File.WriteAllBytes(savePath, data.ToArray());
            }
            catch (Exception ex)
            {
                Function.WriteLog(ex.ToString(), "CreateQRCode");
            }
            return "/" + myPath + "/" + name + ".png";
        }



        #region 获取网络文件内容

        public static string GetNetFileContent(string url)
        {
            string textContent = "";     
            using (var client = new WebClient())
            {
                try
                {
                    textContent = client.DownloadString(url); // 通过 DownloadString 方法获取网页内容
                }
                catch (Exception ex)
                {
                    WriteLog(DateTime.Now.ToString() + "\n" + url + "\n" + ex.ToString() + "\n\n", "获取网络文件内容异常");
                }
            }
            return textContent;
        }

        public static byte[] GetNetFileData(string url)
        {
            byte[] textContent = new byte[] { };
            using (var client = new WebClient())
            {
                try
                {
                    textContent = client.DownloadData(url); // 通过 DownloadString 方法获取网页内容
                }
                catch (Exception ex)
                {
                    WriteLog(DateTime.Now.ToString() + "\n" + ex.ToString() + "\n\n", "获取网络文件流异常");
                }
            }
            return textContent;
        }

        #endregion
    }
}