获取UnionID

如果你需要多平台管理你的微信用户，那么unionID将成为你唯一的选择。
获取UnionID有两种方式

方式一、通过获取用户信息中来获取UnionID

    /// <summary>
    /// 获取unionID
    /// </summary>
    /// <param name="access_token">基础access_token</param>
    /// <param name="openId">用户openID</param>
    /// <returns>返回openId对应的unionID</returns>
    public static string getUnionID(int wxid, string openId)
    {
        CRMComm wxCom = new CRMComm();
        string errMsg = "";
        string unionId = "";
        string url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=" + wxCom.GetAccessToken(wxid, out errMsg) + "&openid=" + openId + "&lang=zh_CN";
        string result = RequestHelper.GetAcc(url);
        result = "[" + result + "]";

        JArray cardResult = (JArray)JsonConvert.DeserializeObject(result);
        JObject cardObj = (JObject)cardResult[0];

        if (cardObj["unionid"] != null)
        {
            unionId = cardObj["unionid"].ToString();
        }

        return unionId;
    }

方式二、通过网页授权的方式来获取uniodID

注意！！！注意！！！
获取unionID是有前提条件的，需要你将公众号绑定到微信平台https://open.weixin.qq.com/。

标签：string,UnionID,获取,result,unionID,unionId
来源： https://blog.csdn.net/dlorwolleh/article/details/89708817