WeChat development-Jssdk call sharing example

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.IO; using Newtonsoft.Json; using System.Net; using System.Runtime.Serialization.Formatters.Binary; using System.Text; using System.Security.Cryptography; /// 
 /// WXJSSDK 的摘要说明 /// 
 public class WXJSSDK { private string appId; private string appSecret; private DataTable DT; public WXJSSDK(string appId, string appSecret) { this.appId = appId; this.appSecret = appSecret; } //得到数据包，返回使用页面 public System.Collections.Hashtable getSignPackage() { string jsapiTicket = getJsApiTicket(); string url = HttpContext.Current.Request.Url.ToString(); string timestamp = Convert.ToString(ConvertDateTimeInt(DateTime.Now)); string nonceStr = createNonceStr(); // 这里参数的顺序要按照 key 值 ASCII 码升序排序 string rawstring = "jsapi_ticket=" + jsapiTicket + "&noncestr=" + nonceStr + "×tamp=" + timestamp + "&url=" + url + ""; string signature = SHA1_Hash(rawstring); System.Collections.Hashtable signPackage = new System.Collections.Hashtable(); signPackage.Add("appId", appId); signPackage.Add("nonceStr", nonceStr); signPackage.Add("timestamp", timestamp); signPackage.Add("url", url); signPackage.Add("signature", signature); signPackage.Add("rawString", rawstring); return signPackage; } //创建随机字符串 private string createNonceStr() { int length = 16; string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; string str = ""; Random rad = new Random(); for (int i = 0; i < length; i++) { str += chars.Substring(rad.Next(0, chars.Length - 1), 1); } return str; } //得到ticket 如果文件里时间 超时则重新获取 //注：jsapi_ticket使用规则（有过期时间）类似access_token, oauth的access_token与基础access_token不同 private string getJsApiTicket() { //这里我从数据库读取 DT = DbSession.Default.FromSql("select jsapi_ticket,ticket_expires from table where ID=1").ToDataTable(); int expire_time = (int)DT.Rows[0]["ticket_expires"]; string ticket = DT.Rows[0]["jsapi_ticket"].ToString(); string accessToken =getAccessToken();//获取系统的全局token if (expire_time < ConvertDateTimeInt(DateTime.Now)) { string url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=" + accessToken + ""; Jsapi api =JsonConvert.DeserializeObject(httpGet(url)); ticket = api.ticket; if (ticket != "") { expire_time = ConvertDateTimeInt(DateTime.Now) + 7000; //存入数据库操作 } } return ticket; } ////得到accesstoken 如果文件里时间 超时则重新获取 //private string getAccessToken() //{ // // access_token 应该全局存储与更新，以下代码以写入到文件中做示例 // string access_token = ""; // string path = HttpContext.Current.Server.MapPath(@"/weixin/access_token.json"); // FileStream file = new FileStream(path, FileMode.Open); // var serializer = new DataContractJsonSerializer(typeof(AccToken)); // AccToken readJSTicket = (AccToken)serializer.ReadObject(file); // file.Close(); // if (readJSTicket.expires_in < ConvertDateTimeInt(DateTime.Now)) // { // string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appId + "&secret=" + appSecret + ""; // AccToken iden = Desrialize(new AccToken(), httpGet(url)); // access_token = iden.access_token; // if (access_token != "") // { // iden.expires_in = ConvertDateTimeInt(DateTime.Now) + 7000; // iden.access_token = access_token; // string json = Serialize(iden); // StreamWriterMetod(json, path); // } // } // else // { // access_token = readJSTicket.access_token; // } // return access_token; //} //发起一个http请球，返回值 private string httpGet(string url) { try { WebClient MyWebClient = new WebClient(); MyWebClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于向Internet资源的请求进行身份验证的网络凭据 Byte[] pageData = MyWebClient.DownloadData(url); //从指定网站下载数据 string pageHtml = System.Text.Encoding.Default.GetString(pageData); //如果获取网站页面采用的是GB2312，则使用这句 return pageHtml; } catch (WebException webEx) { Console.WriteLine(webEx.Message.ToString()); return null; } } //SHA1哈希加密算法 public string SHA1_Hash(string str_sha1_in) { SHA1 sha1 = new SHA1CryptoServiceProvider(); byte[] bytes_sha1_in = System.Text.UTF8Encoding.Default.GetBytes(str_sha1_in); byte[] bytes_sha1_out = sha1.ComputeHash(bytes_sha1_in); string str_sha1_out = BitConverter.ToString(bytes_sha1_out); str_sha1_out = str_sha1_out.Replace("-", "").ToLower(); return str_sha1_out; } /// 
 /// StreamWriter写入文件方法 /// 
 private void StreamWriterMetod(string str, string patch) { try { FileStream fsFile = new FileStream(patch, FileMode.OpenOrCreate); StreamWriter swWriter = new StreamWriter(fsFile); swWriter.WriteLine(str); swWriter.Close(); } catch (Exception e) { throw e; } } /// 
 /// 将c# DateTime时间格式转换为Unix时间戳格式 /// 
 /// 时间 /// double public int ConvertDateTimeInt(System.DateTime time) { int intResult = 0; System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1)); intResult = Convert.ToInt32((time - startTime).TotalSeconds); return intResult; } } //创建Json序列化 及反序列化类目 #region //创建JSon类 保存文件 jsapi_ticket.json public class JSTicket { public string jsapi_ticket { get; set; } public double expire_time { get; set; } } //创建 JSon类 保存文件 access_token.json public class AccToken { public string access_token { get; set; } public double expires_in { get; set; } } //创建从微信返回结果的一个类 用于获取ticket public class Jsapi { public int errcode { get; set; } public string errmsg { get; set; } public string ticket { get; set; } public string expires_in { get; set; } } #endregion

WXJSSDK jssdk = new WXJSSDK(AppId,AppSecret); Hashtable hs = jssdk.getSignPackage(); string signature = hs["signature"].ToString(); string signature = hs["signature"].ToString(); string timestamp = hs["timestamp"].ToString(); string nonce = hs["nonceStr"].ToString();