后面代码需要用到的参数、方法、类
private string WeChatRedirectUrl = "www.test.com";//需要被授权的页面地址 //对页面进行授权重新返回的新地址，新地址包含code private string WeChatOauth2Url = @"https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri={1}&response_type=code&scope=snsapi_userinfo&state=STATE#123"; private string WeChatAccessTokenUrl = @"https://api.weixin.qq.com/sns/oauth2/access_token";//网页授权access_token，获取用户唯一标识openID private string WeChatUserInfoUrl = @"https://api.weixin.qq.com/sns/userinfo";//获取用户信息地址 private string WeChatAppId = "wx123456789abcdefg";//公众号的唯一标识 private string WeChatAppSecret = "a6d6ccf8182fn2a5a8e1ae1234e638c9";//公众号的appsecret /// <summary> /// GET请求 /// </summary> /// <param name="Url">The URL.</param> /// <param name="postDataStr">The post data string.</param> /// <returns>System.String.</returns> public static string HttpGet(string Url, string postDataStr = "") { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == "" ? "" : "?") + postDataStr); request.Method = "GET"; request.ContentType = "text/html;charset=UTF-8"; HttpWebResponse response = (HttpWebResponse)request.GetResponse(); Stream myResponseStream = response.GetResponseStream(); StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8")); string retString = myStreamReader.ReadToEnd(); myStreamReader.Close(); myResponseStream.Close(); return retString; } public class JsonHelper { public JsonHelper() { // // TODO: Add constructor logic here // } /// <summary> /// 把对象序列化 JSON 字符串 /// </summary> /// <typeparam name="T">对象类型</typeparam> /// <param name="obj">对象实体</param> /// <returns>JSON字符串</returns> public static string GetJson<T>(T obj) { DataContractJsonSerializer json = new DataContractJsonSerializer(typeof(T)); using (MemoryStream ms = new MemoryStream()) { json.WriteObject(ms, obj); string szJson = Encoding.UTF8.GetString(ms.ToArray()); return szJson; } } /// <summary> /// 把JSON字符串还原为对象 /// </summary> /// <typeparam name="T">对象类型</typeparam> /// <param name="szJson">JSON字符串</param> /// <returns>对象实体</returns> public static T ParseFormJson<T>(string szJson) { T obj = Activator.CreateInstance<T>(); using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(szJson))) { DataContractJsonSerializer dcj = new DataContractJsonSerializer(typeof(T)); return (T)dcj.ReadObject(ms); } } } //授权成功返回的信息 public class OutWechatSuccessInfo { /// <summary> /// code作为换取access_token的票据，每次用户授权带上的code将不一样，code只能使用一次，5分钟未被使用自动过期。 /// </summary> public string code { get; set; } /// <summary> /// 接口调用凭证 /// </summary> public string access_token { get; set; } /// <summary> /// access_token接口调用凭证超时时间，单位（秒） /// </summary> public int expires_in { get; set; } /// <summary> /// 用户刷新access_token /// </summary> public string refresh_token { get; set; } /// <summary> /// 授权用户唯一标识 /// </summary> public string openid { get; set; } /// <summary> /// 用户授权的作用域，使用逗号（,）分隔 /// </summary> public string scope { get; set; } } //拉取的用户信息 public class OutWeChatUserInfo { /// <summary> /// 用户的唯一标识 /// </summary> public string openid { get; set; } /// <summary> /// 用户昵称 /// </summary> public string nickname { get; set; } /// <summary> /// 用户的性别，值为1时是男性，值为2时是女性，值为0时是未知 /// </summary> public int sex { get; set; } /// <summary> /// 用户个人资料填写的省份 /// </summary> public string province { get; set; } /// <summary> /// 普通用户个人资料填写的城市 /// </summary> public string city { get; set; } /// <summary> /// 国家，如中国为CN /// </summary> public string country { get; set; } /// <summary> /// 用户头像，最后一个数值代表正方形头像大小 /// </summary> public string headimgurl { get; set; } /// <summary> /// 用户特权信息 /// </summary> public string privilege { get; set; } }
第一步：用户同意授权，获取code
/// <summary> /// 获取授权后的URL /// </summary> /// <returns></returns> public async Task<ReturnJson> GetRedirectUrl() { try { string url = string.Format(WeChatOauth2Url, WeChatAppId, WeChatRedirectUrl); return ReturnJson.ToResult(ReturnCode.Success, new { redirectURL = url }); } catch (Exception e) { return ReturnJson.ToResult(ReturnCode.ServiceError, e.Message); } }
第二步：通过code换取网页授权access_token和用户唯一标识openID
/// <summary> /// 获取用户唯一标识openID /// </summary> /// <param name="code"></param> /// <returns></returns> public OutWechatSuccessInfo GetOpenID(string code) { string sUrlpara = "appid=" + WeChatAppId + "&secret=" + WeChatAppSecret + "&code=" + code + "&grant_type=authorization_code";//请求的参数 string jsonStr = HttpHelper.HttpGet(WeChatAccessTokenUrl, sUrlpara); if (jsonStr.Contains("errcode")) { return null; } //放回json解析 OutWechatSuccessInfo result = new OutWechatSuccessInfo(); result = JsonHelper.ParseFormJson<OutWechatSuccessInfo>(jsonStr); return result; }
第三步：拉取用户信息(需scope为 snsapi_userinfo)
/// <summary> /// 拉取登录用户信息 /// </summary> /// <param name="accessToken"></param> /// <param name="openId"></param> /// <returns></returns> public OutWeChatUserInfo GetWeChatUserInfo(string accessToken, string openId) { string sUrlpara = "access_token=" + accessToken + "&openid=" + openId + "?=zh_CN"; ;//请求的参数 string jsonStr = HttpHelper.HttpGet(WeChatUserInfoUrl, sUrlpara); if (jsonStr.Contains("errcode")) { return null; } //放回json解析 OutWeChatUserInfo result = new OutWeChatUserInfo(); result = JsonHelper.ParseFormJson<OutWeChatUserInfo>(jsonStr); return result; }