您好,登錄后才能下訂單哦!
這篇文章主要介紹了微信公眾號(hào)開(kāi)發(fā)網(wǎng)頁(yè)中如何獲取當(dāng)前用戶Openid,具有一定借鑒價(jià)值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
具體實(shí)現(xiàn)
首先,我們定一個(gè)獲取openid的方法 ReGetOpenId
public static void ReGetOpenId() { string url = System.Web.HttpContext.Current.Request.Url.AbsoluteUri;//獲取當(dāng)前url if (System.Web.HttpContext.Current.Session["openid"] == "" || System.Web.HttpContext.Current.Session["openid"] == null) { //先要判斷是否是獲取code后跳轉(zhuǎn)過(guò)來(lái)的 if (System.Web.HttpContext.Current.Request.QueryString["code"] == "" || System.Web.HttpContext.Current.Request.QueryString["code"] == null) { //Code為空時(shí),先獲取Code string GetCodeUrls = GetCodeUrl(url); System.Web.HttpContext.Current.Response.Redirect(GetCodeUrls);//先跳轉(zhuǎn)到微信的服務(wù)器,取得code后會(huì)跳回來(lái)這頁(yè)面的 } else { //Code非空,已經(jīng)獲取了code后跳回來(lái)啦,現(xiàn)在重新獲取openid Log log = new Log(AppDomain.CurrentDomain.BaseDirectory + @"/log/Log.txt"); string openid = ""; openid = GetOauthAccessOpenId(System.Web.HttpContext.Current.Request.QueryString["Code"]);//重新取得用戶的openid System.Web.HttpContext.Current.Session["openid"] = openid; } } }
注:url最好是帶域名的,花生殼的域名是行不通的,再調(diào)微信平臺(tái)接口的時(shí)候,會(huì)報(bào)鏈接不正確錯(cuò)誤
上文中GetCodeUrl方法如下
#region 重新獲取Code的跳轉(zhuǎn)鏈接(沒(méi)有用戶授權(quán)的,只能獲取基本信息) /// <summary>重新獲取Code,以后面實(shí)現(xiàn)帶著Code重新跳回目標(biāo)頁(yè)面(沒(méi)有用戶授權(quán)的,只能獲取基本信息(openid))</summary> /// <param name="url">目標(biāo)頁(yè)面</param> /// <returns></returns> public static string GetCodeUrl(string url) { string CodeUrl = ""; //對(duì)url進(jìn)行編碼 url = System.Web.HttpUtility.UrlEncode(url); CodeUrl = string.Format("https://open.weixin.qq.com/connect/oauth3/authorize?appid=" + Appid + "&redirect_uri=" + url + "?action=viewtest&response_type=code&scope=snsapi_base&state=1#wechat_redirect"); return CodeUrl; } #endregion
上文中 GetOauthAccessOpenId方法如下
#region 以Code換取用戶的openid、access_token /// <summary>根據(jù)Code獲取用戶的openid、access_token</summary> public static string GetOauthAccessOpenId(string code) { Log log = new Log(AppDomain.CurrentDomain.BaseDirectory + @"/log/Log.txt"); string Openid = ""; string url = "https://api.weixin.qq.com/sns/oauth3/access_token?appid=" + Appid + "&secret=" + Secret + "&code=" + code + "&grant_type=authorization_code"; string gethtml = MyHttpHelper.HttpGet(url); log.log("拿到的url是:" + url); log.log("獲取到的gethtml是" + gethtml); OAuth_Token ac = new OAuth_Token(); ac = JsonHelper.ToObject<OAuth_Token>(gethtml); log.log("能否從html里拿到openid=" + ac.openid); Openid = ac.openid; return Openid; } #endregion
通過(guò)以上方法即可拿到用戶的Openid,如上文所示,用戶id保存在System.Web.HttpContext.Current.Session["openid"] 中,所以獲取也是非常簡(jiǎn)單
在需要獲取的地方執(zhí)行
#region 獲取當(dāng)前用戶Openid ReGetOpenId(); log.log("走完獲取openid的方法之后,當(dāng)前Session的值是:" + System.Web.HttpContext.Current.Session["openid"]); #endregion
注:上文中 OAuth_Token 類(lèi)如下:
public class OAuth_Token { /// <summary> /// 網(wǎng)頁(yè)授權(quán)接口調(diào)用憑證,注意:此access_token與基礎(chǔ)支持的access_token不同 /// </summary> public string access_token { get; set; } /// <summary> /// access_token接口調(diào)用憑證超時(shí)時(shí)間,單位(秒) /// </summary> public string expires_in { get; set; } /// <summary> /// 用戶刷新access_token /// </summary> public string refresh_token { get; set; } /// <summary> /// 用戶唯一標(biāo)識(shí),請(qǐng)注意,在未關(guān)注公眾號(hào)時(shí),用戶訪問(wèn)公眾號(hào)的網(wǎng)頁(yè),也會(huì)產(chǎn)生一個(gè)用戶和公眾號(hào)唯一的OpenID /// </summary> public string openid { get; set; } /// <summary> /// 用戶授權(quán)作用域 /// </summary> public string scope { get; set; } }
日志文件
用到的簡(jiǎn)單日志類(lèi)也順便提供放上來(lái):
/// <summary> /// 日志類(lèi) /// </summary> public class Log { private string logFile; private StreamWriter writer; private FileStream fileStream = null; public Log(string fileName) { logFile = fileName; CreateDirectory(logFile); } public void log(string info) { try { System.IO.FileInfo fileInfo = new System.IO.FileInfo(logFile); if (!fileInfo.Exists) { fileStream = fileInfo.Create(); writer = new StreamWriter(fileStream); } else { fileStream = fileInfo.Open(FileMode.Append, FileAccess.Write); writer = new StreamWriter(fileStream); } writer.WriteLine(DateTime.Now + ": " + info); } finally { if (writer != null) { writer.Close(); writer.Dispose(); fileStream.Close(); fileStream.Dispose(); } } } public void CreateDirectory(string infoPath) { DirectoryInfo directoryInfo = Directory.GetParent(infoPath); if (!directoryInfo.Exists) { directoryInfo.Create(); } } }
調(diào)用呢,很簡(jiǎn)單,調(diào)用方法如下:
Log log = new Log(AppDomain.CurrentDomain.BaseDirectory + @"/log/Log.txt"); log.log("我會(huì)被輸入在日志文件中")
最后呢,拿到當(dāng)前用戶Openid,就可以從數(shù)據(jù)庫(kù)再次獲取到該用戶的其他基本信息。從而可以更好的輔助你完成你項(xiàng)目中其他的業(yè)務(wù)模塊。
感謝你能夠認(rèn)真閱讀完這篇文章,希望小編分享的“微信公眾號(hào)開(kāi)發(fā)網(wǎng)頁(yè)中如何獲取當(dāng)前用戶Openid”這篇文章對(duì)大家有幫助,同時(shí)也希望大家多多支持億速云,關(guān)注億速云行業(yè)資訊頻道,更多相關(guān)知識(shí)等著你來(lái)學(xué)習(xí)!
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如果涉及侵權(quán)請(qǐng)聯(lián)系站長(zhǎng)郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。