C#-公众号H5页面授权获取用户code、openid、unionid - ToB企服应用市场:ToB评测及商务社交产业平台

var AppID="公众号APPID";
const { origin } = window.location //获取域名
const currentUrl = encodeURIComponent(`${origin}/HTML/Index.html?z=`)//对URL进行转码 //跳转授权
window.location.href = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=' + APPID+ '&redirect_uri=' + currentUrl + '&response_type=code&scope=snsapi_userinfo&state=123#wechat_redirect'; //跳转授权后>会返回【currentUrl】指定页面并追加参数code!　　此时仅需--获取地址参数【code】 //注意：注意：注意：currentUrl 中域名不能带端口号！！！不能带端口号！！！不能带端口号！！！【me遇到了这个问题找半天！】 //获取地址参数code const code = GetQueryString('code')

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//获取地址参数值 function GetQueryString(name) {

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using Common;
using HealthApp.Common.wx;
using Newtonsoft.Json.Linq;
using System.Net;
using System.Text;
using System.Web;
using System.Web.Script.Serialization;
namespace HealthApp.Ashx
{
/// <summary>
/// wx 的摘要说明
/// </summary>
public class wx : IHttpHandler
{
public static string AppID = "";//公众号APPID
public static string AppSecret = "";//公众号AppSecret
public static string GetOpenid(string code)
{
//微信认证部分：第二步获得openid
string url = string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code", AppID, AppSecret, code);
string result = HttpClientHelper.GetResponse(url);
JObject outputObj = JObject.Parse(result);
return outputObj["openid"].ToString();
}
public static string GetUser(string access_token, string openID)
{
//微信认证部分：第三步获得unionid
string url = string.Format("https://api.weixin.qq.com/sns/userinfo?access_token={0}&openid={1}&lang=zh_CN", access_token, openID);
string result = HttpClientHelper.GetResponse(url);
JavaScriptSerializer js = new JavaScriptSerializer();
Access_Token amodel = js.Deserialize<Access_Token>(result);//此处为定义的类，用以将json转成model
//JObject outputObj = JObject.Parse(result);
//return outputObj["unionid"].ToString();
return amodel.unionid;
}
/// <summary>
/// 通过code获得access_token
/// </summary>
/// <param name="appid"></param>
/// <param name="appsecret"></param>
/// <returns></returns>
public static Access_Token Get_Access_token(string code)
{
string a_token = string.Empty;
WebClient webclient = new WebClient();
string url = string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code", AppID, AppSecret, code);
byte[] bytes = webclient.DownloadData(url);//在指定的path上下载
string result = Encoding.GetEncoding("utf-8").GetString(bytes);//转string
//WriteTextLogHelper.WriteTextLog("获取token", result, DateTime.Now);
JavaScriptSerializer js = new JavaScriptSerializer();
Access_Token amodel = js.Deserialize<Access_Token>(result);//此处为定义的类，用以将json转成model
return amodel;
}
public class Access_Token
{
public string access_token { get; set; }
public string expires_in { get; set; }
public string openid { get; set; }
public string unionid { get; set; }
public string errcode { get; set; }
}
}
}

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//传参-页面授权的code
string code = context.Request["code"].ToString();
if (string.IsNullOrEmpty(code))
{
//未授权！需要授权
//wx.OpenAccess(tj);
context.Response.Write("未授权");
}
//第二部获取access_token
var access_token = wx.Get_Access_token(code);
//第三部拉取用户信息
var unionid = wx.GetUser(access_token.access_token, access_token.openid);
var openID = access_token.openid;

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