本人亲测-C#常用工具类

/*
     * HTTP接口工具类
     */
    public class HttpUitls
    {
        /*
         * get请求
         */
        public static string Get(string Url)
        {
            //System.GC.Collect();
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
            request.Proxy = null;
            request.KeepAlive = false;
            request.Method = "GET";
            request.ContentType = "application/json; charset=UTF-8";
            request.AutomaticDecompression = DecompressionMethods.GZip;

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
            string retString = myStreamReader.ReadToEnd();

            myStreamReader.Close();
            myResponseStream.Close();

            if (response != null)
            {
                response.Close();
            }
            if (request != null)
            {
                request.Abort();
            }

            return retString;
        }

        /*
        * post请求 Referer(允许为空)
        */
        public static string Post(string Url, string Data, string Referer)
        {
            string retString = "";
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
                request.Method = "POST";
                request.Referer = Referer;
                byte[] bytes = Encoding.UTF8.GetBytes(Data);
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = bytes.Length;
                Stream myResponseStream = request.GetRequestStream();
                myResponseStream.Write(bytes, 0, bytes.Length);

                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                StreamReader myStreamReader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                retString = myStreamReader.ReadToEnd();

                myStreamReader.Close();
                myResponseStream.Close();

                if (response != null)
                {
                    response.Close();
                }
                if (request != null)
                {
                    request.Abort();
                }

            }
            catch (Exception ex)
            {
               Console.WriteLine("异常：" + ex);
            }

            return retString;
        }

    }

 /*
     * Wav音频播放工具类
     */
    public class WavUtils
    {
        //播放
        public static void WAVPlay(string myWav)
        {
            SoundPlayer sound = new SoundPlayer();
            sound.SoundLocation = @myWav;
            sound.Load();
            sound.Play();
        }

        //暂停
        public static void WAVStop(string myWav)
        {
            SoundPlayer sound = new SoundPlayer();
            sound.SoundLocation = @myWav;
            sound.Load();
            sound.Stop();
        }
    }

 /*
     * 加密解密工具类
     */
    public class EncryptHelper
    {
        //默认密钥
        private static string AESKey = "[45/*YUIdse..e;]";
        private static string DESKey = "[&HdN72]";

        /// <summary>
        /// AES加密
        /// </summary>
        public static string AESEncrypt(string value, string _aeskey = null)
        {
            if (string.IsNullOrEmpty(_aeskey))
            {
                _aeskey = AESKey;
            }

            byte[] keyArray = Encoding.UTF8.GetBytes(_aeskey);
            byte[] toEncryptArray = Encoding.UTF8.GetBytes(value);

            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateEncryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }

        /// <summary>
        /// AES解密
        /// </summary>
        public static string AESDecrypt(string value, string _aeskey = null)
        {
            try
            {
                if (string.IsNullOrEmpty(_aeskey))
                {
                    _aeskey = AESKey;
                }
                byte[] keyArray = Encoding.UTF8.GetBytes(_aeskey);
                byte[] toEncryptArray = Convert.FromBase64String(value);

                RijndaelManaged rDel = new RijndaelManaged();
                rDel.Key = keyArray;
                rDel.Mode = CipherMode.ECB;
                rDel.Padding = PaddingMode.PKCS7;

                ICryptoTransform cTransform = rDel.CreateDecryptor();
                byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

                return Encoding.UTF8.GetString(resultArray);
            }
            catch
            {
                return string.Empty;
            }
        }

        /// <summary>
        /// DES加密
        /// </summary>
        public static string DESEncrypt(string value, string _deskey = null)
        {
            if (string.IsNullOrEmpty(_deskey))
            {
                _deskey = DESKey;
            }

            byte[] keyArray = Encoding.UTF8.GetBytes(_deskey);
            byte[] toEncryptArray = Encoding.UTF8.GetBytes(value);

            DESCryptoServiceProvider rDel = new DESCryptoServiceProvider();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateEncryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }

        /// <summary>
        /// DES解密
        /// </summary>
        public static string DESDecrypt(string value, string _deskey = null)
        {
            try
            {
                if (string.IsNullOrEmpty(_deskey))
                {
                    _deskey = DESKey;
                }
                byte[] keyArray = Encoding.UTF8.GetBytes(_deskey);
                byte[] toEncryptArray = Convert.FromBase64String(value);

                DESCryptoServiceProvider rDel = new DESCryptoServiceProvider();
                rDel.Key = keyArray;
                rDel.Mode = CipherMode.ECB;
                rDel.Padding = PaddingMode.PKCS7;

                ICryptoTransform cTransform = rDel.CreateDecryptor();
                byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

                return Encoding.UTF8.GetString(resultArray);
            }
            catch
            {
                return string.Empty;
            }
        }

        public static string MD5(string value)
        {
            byte[] result = Encoding.UTF8.GetBytes(value);
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] output = md5.ComputeHash(result);
            return BitConverter.ToString(output).Replace("-", "");
        }

        public static string HMACMD5(string value, string hmacKey)
        {
            HMACSHA1 hmacsha1 = new HMACSHA1(Encoding.UTF8.GetBytes(hmacKey));
            byte[] result = System.Text.Encoding.UTF8.GetBytes(value);
            byte[] output = hmacsha1.ComputeHash(result);

            return BitConverter.ToString(output).Replace("-", "");
        }

        /// <summary>
        /// base64编码
        /// </summary>
        /// <returns></returns>
        public static string Base64Encode(string value)
        {
            string result = Convert.ToBase64String(Encoding.Default.GetBytes(value));
            return result;
        }
        /// <summary>
        /// base64解码
        /// </summary>
        /// <returns></returns>
        public static string Base64Decode(string value)
        {
            string result = Encoding.Default.GetString(Convert.FromBase64String(value));
            return result;
        }

    }

/*
     * 获取版本号工具类
     */
    public class ExeVersionUtils
    {
        /*
         * exe路径，返回当前版本号
         */
        public static string getOldVersionNumber(string exePath)
        {
            string FileVersions = "";

            FileVersionInfo file1 = System.Diagnostics.FileVersionInfo.GetVersionInfo(exePath);
            //版本号显示为“主版本号.次版本号.内部版本号.专用部件号”。
            FileVersions = String.Format("{0}.{1}.{2}.{3}", file1.FileMajorPart, file1.FileMinorPart, file1.FileBuildPart, file1.FilePrivatePart);

            return FileVersions;
        }

        /*
         * 检测是否需要升级本地的客户端，不需要返回"",需要直接返回下载地址
         * 调用接口返回当前服务器最新的版本号
         */
        public static string CheckVersion(String LocalVersion, String loginName)
        {
            string downloadURL = "";
            //把接口写了
            string ServerVersion = HttpUitls.Get("");
            if (CompareVersion(ServerVersion, LocalVersion))
            {
                //下载最新客户端安装包的地址
                downloadURL = "";
            }

            return downloadURL;
        }

        /*
         * 版本号比较(使用C#自带的Version对象来比较版本号)
         * ServerVersion 服务器最新版本号，LocalVersion 本地程序版本号
         */
        public static bool CompareVersion(string ServerVersion,string LocalVersion)
        {
            bool flag = false;
            Version sv = new Version(ServerVersion);
            Version lv = new Version(LocalVersion);
            //服务器上面的客户端的版本号比本地客户端的版本号高。
            if (sv > lv)
            {
                flag = true;
            }
            if (sv < lv)
            {
                flag = false;
            }
            return flag;
        }
    }

 /*
     * 下载文件(显示下载百分比，winform控件)
     */
    public class FileDownload
    {
        /// <summary>
        /// 下载文件
        /// </summary>
        /// <param name="URL">下载文件地址</param>
        /// <param name="Filename">下载后的存放地址</param>
        /// <param name="Prog">用于显示的进度条</param>
        ///
        public static bool DownloadFile(string URL, string filename, System.Windows.Forms.ProgressBar prog, System.Windows.Forms.Label label1)
        {
            float percent = 0;
            try
            {
                System.Net.HttpWebRequest Myrq = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(URL);
                System.Net.HttpWebResponse myrp = (System.Net.HttpWebResponse)Myrq.GetResponse();
                long totalBytes = myrp.ContentLength;
                if (prog != null)
                {
                    prog.Maximum = (int)totalBytes;
                }
                System.IO.Stream st = myrp.GetResponseStream();
                System.IO.Stream so = new System.IO.FileStream(filename, System.IO.FileMode.Create);
                long totalDownloadedByte = 0;
                byte[] by = new byte[1024];
                int osize = st.Read(by, 0, (int)by.Length);
                while (osize > 0)
                {
                    totalDownloadedByte = osize + totalDownloadedByte;
                    System.Windows.Forms.Application.DoEvents();
                    so.Write(by, 0, osize);
                    if (prog != null)
                    {
                        prog.Value = (int)totalDownloadedByte;
                    }
                    osize = st.Read(by, 0, (int)by.Length);

                    percent = (float)totalDownloadedByte / (float)totalBytes * 100;
                    label1.Text = percent.ToString() + "%";
                    System.Windows.Forms.Application.DoEvents(); //必须加注这句代码，否则label1将因为循环执行太快而来不及显示信息
                }
                so.Close();
                st.Close();
                return true;
            }
            catch (System.Exception)
            {
                return false;
                throw;
            }
        }
    }