思維導航

• JSSDK使用步驟

• 獲取access_token(公眾號的全局唯一接口調(diào)用憑據(jù))

• 獲取jsapi_ticket微信公眾號調(diào)用微信JS接口的臨時票據(jù)

• 生成簽名的隨機串（nonceStr）

• 生成簽名時間戳（timestamp）

• 獲取當前網(wǎng)頁URL

• 生成簽名（signature）

• DotNetGuide技術(shù)社區(qū)交流群

• 參考資料

        /// <summary>

        /// 獲取微信公眾號全局唯一接口憑證

        /// </summary>

        /// <returns></returns>

        public static string RequestAccessToken()

        {   // 設(shè)置參數(shù)

            string appid=WxAppId;//第三方用戶唯一憑證

            string appsecret=WxAppSecret;//第三方用戶唯一憑證密鑰，即appsecret

            //請求接口獲取

            string _url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appid + "&secret=" + appsecret;

            string method = "GET";

            HttpWebRequest request = WebRequest.Create(_url) as HttpWebRequest;

            CookieContainer cookieContainer = new CookieContainer();

            request.CookieContainer = cookieContainer;

            request.AllowAutoRedirect = true;

            request.Method = method;

            request.ContentType = "text/html";

            request.Headers.Add("charset", "utf-8");

            //發(fā)送請求并獲取響應(yīng)數(shù)據(jù)

            HttpWebResponse response = request.GetResponse() as HttpWebResponse;

            Stream responseStream = response.GetResponseStream();

            StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);

            //獲取返回過來的結(jié)果

            string content = sr.ReadToEnd();

            dynamic resultContent=JsonConvert.DeserializeObject(content,new { access_token="", expires_in="", errcode="", errmsg="" }.GetType());

            if (resultContent!=null&&!string.IsNullOrWhiteSpace(resultContent.access_token)) //注意：請求成功時是不會有errcode=0返回,判斷access_token是否有值即可

            {

                return resultContent.access_token;//返回請求唯一憑證

            }

            else

            {

                //請求失敗，返回為空

                return "";

            }

        }

        /// <summary>

        /// 獲取jsapi_ticket微信公眾號調(diào)用微信JS接口的臨時票據(jù)

        /// </summary>

        /// <param name="accessToken">微信公眾號的全局唯一接口調(diào)用憑證</param>

        /// <returns></returns>

        public static string RequestJsapi_ticket(string accessToken)

        {

            string content = "";

            try

            {

                //TODO：注意api_ticket 是用于調(diào)用微信卡券JS API的臨時票據(jù)，有效期為7200 秒，通過access_token 來獲取。

                string url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + accessToken + "&type=jsapi";

                string method = "GET";

                HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

                CookieContainer cookieContainer = new CookieContainer();

                request.CookieContainer = cookieContainer;

                request.AllowAutoRedirect = true;

                request.Method = method;

                request.ContentType = "text/html";

                request.Headers.Add("charset", "utf-8");

                //發(fā)送請求并獲取響應(yīng)數(shù)據(jù)

                HttpWebResponse response = request.GetResponse() as HttpWebResponse;

                Stream responseStream = response.GetResponseStream();

                StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);

                //獲取返回過來的結(jié)果

                content = sr.ReadToEnd();

                dynamic resultStr = JsonConvert.DeserializeObject(content,new { errcode="", errmsg="",ticket="", expires_in=""}.GetType());

                //請求成功

                if (resultStr.errcode=="0"&&resultStr.errmsg=="ok")

                {

                    content=resultStr.ticket;

                }

                else

                {

                    content = "";

                }

                return content;

            }

            catch (Exception ex)

            {

                content = ex.Message;

                return content;

            }

        }

        /// <summary>

        /// 隨機字符串數(shù)組集合

        /// </summary>

        private static readonly string[] NonceStrings = new string[]

                                    {

                                    "a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z",

                                    "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"

                                    };

        /// <summary>

        /// 生成簽名的隨機串

        /// </summary>

        /// <returns></returns>

        public static string CreateNonceStr()

        {

            Random random = new Random();

            var sb = new StringBuilder();

            var length = NonceStrings.Length;

            //生成15位數(shù)的隨機字符串，當然也可以通過控制對應(yīng)字符串大小生成，但是至多不超過32位

            for (int i = 0; i < 15; i++)

            {

                sb.Append(NonceStrings[random.Next(length - 1)]);//通過random獲得的隨機索引到，NonceStrings數(shù)組中獲取對應(yīng)數(shù)組值

            }

            return sb.ToString();

        }

        /// <summary>

        /// 獲取當前時間戳

        /// </summary>

        /// <returns></returns>

        public static long GetCurrentUinxTime()

        {

            DateTime currentDate = DateTime.Now;//當前時間

            //轉(zhuǎn)化為時間戳

            DateTime localTime = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));

            return long.Parse((currentDate - localTime).TotalSeconds.ToString().Split('.')[0]);

        }

        /// <summary>

        /// 獲取簽名

        /// </summary>

        /// <param name="jsapi_ticket">微信公眾號調(diào)用微信JS臨時票據(jù)</param>

        /// <param name="nonceStr">隨機串</param>

        /// <param name="timestamp">時間戳</param>

        /// <param name="url">當前網(wǎng)頁URL</param>

        /// <returns></returns>

        public static string GetSignature(string jsapi_ticket, string nonceStr, long timestamp, string url)

        {

            var string1Builder = new StringBuilder();

            //注意這里參數(shù)名必須全部小寫，且必須有序

            string1Builder.Append("jsapi_ticket=").Append(jsapi_ticket).Append("&")

                          .Append("noncestr=").Append(nonceStr).Append("&")

                          .Append("timestamp=").Append(timestamp).Append("&")

                          .Append("url=").Append(url.IndexOf("#") >= 0 ? url.Substring(0, url.IndexOf("#")) : url);

            return Sha1(string1Builder.ToString(),Encoding.UTF8);

        }

        /// <summary>

        /// 簽名加密，使用SHA加密所得

        /// </summary>

        /// <param name="content">簽名加密參數(shù)</param>

        /// <param name="encode">編碼UTF-8</param>

        /// <returns></returns>

        public static string Sha1(string content, Encoding encode)

        {

            try

            {

                SHA1 sha1 = new SHA1CryptoServiceProvider();

                byte[] bytesIn = encode.GetBytes(content);

                byte[] bytesOut = sha1.ComputeHash(bytesIn);

                sha1.Dispose();

                string result = BitConverter.ToString(bytesOut);

                result = result.Replace("-", "");

                return result;

            }

            catch (Exception ex)

            {

                throw new Exception("SHA1加密出錯：" + ex.Message);

            }

        }