微信公众平台网页授权获取用户基本信息（VS.NET版）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls; 
using System.IO;  
using System.Text;  
using System.Runtime.Serialization.Json;
using System.Net;  

public partial class OAuthRedirectUri : System.Web.UI.Page
{
    string Appid = "";//公众号APPID
    string appsecret = "";//公众号secret
    protected void Page_Load(object sender, EventArgs e)
    {
         if (!IsPostBack)  
        {  
            if (!string.IsNullOrEmpty(Request.QueryString["code"]))  
            {  
                string Code = Request.QueryString["code"].ToString();  
                //获得Token  
                OAuth_Token Model = Get_token(Code);  
                //Response.Write(Model.access_token);  
                OAuthUser OAuthUser_Model = Get_UserInfo(Model.access_token, Model.openid);  
                Response.Write("用户OPENID:" + OAuthUser_Model.openid + "<br>用户昵称:" + OAuthUser_Model.nickname + "<br>性别:" + OAuthUser_Model.sex + "<br>所在省:" + OAuthUser_Model.province + "<br>所在市:" + OAuthUser_Model.city + "<br>所在国家:" + OAuthUser_Model.country + "<br>头像地址:" + OAuthUser_Model.headimgurl + "<br>用户特权信息:" + OAuthUser_Model.privilege);  
                  
            }  
        }  
    }  

    //获得Token  
    protected OAuth_Token Get_token(string Code)  
    {  
        string Str = GetJson("https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + Appid + "&secret=" + appsecret + "&code=" + Code + "&grant_type=authorization_code");  
        OAuth_Token Oauth_Token_Model = JsonHelper.ParseFromJson<OAuth_Token>(Str);  
        return Oauth_Token_Model;  
    }  
    //刷新Token  
    protected OAuth_Token refresh_token(string REFRESH_TOKEN)  
    {  
        string Str = GetJson("https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=" + Appid + "&grant_type=refresh_token&refresh_token=" + REFRESH_TOKEN);  
        OAuth_Token Oauth_Token_Model = JsonHelper.ParseFromJson<OAuth_Token>(Str);  
        return Oauth_Token_Model;  
    }  
    //获得用户信息  
    protected OAuthUser Get_UserInfo(string REFRESH_TOKEN, string OPENID)  
    {  
       // Response.Write("获得用户信息REFRESH_TOKEN:" + REFRESH_TOKEN + "||OPENID:" + OPENID);  
        string Str = GetJson("https://api.weixin.qq.com/sns/userinfo?access_token=" + REFRESH_TOKEN + "&openid=" + OPENID);  
        OAuthUser OAuthUser_Model = JsonHelper.ParseFromJson<OAuthUser>(Str);  
        return OAuthUser_Model;  
    }  
    protected string GetJson(string url)  
    {  
        WebClient wc = new WebClient();  
        wc.Credentials = CredentialCache.DefaultCredentials;  
        wc.Encoding = Encoding.UTF8;  
        string returnText = wc.DownloadString(url);  
  
        if (returnText.Contains("errcode"))  
        {  
            //可能发生错误  
        }  
        //Response.Write(returnText);  
        return returnText;  
    }  
    public class OAuth_Token  
{  
    public OAuth_Token()  
    {  
  
        //  
        //TODO: 在此处添加构造函数逻辑  
        //  
    }  
    //access_token  网页授权接口调用凭证,注意：此access_token与基础支持的access_token不同  
    //expires_in    access_token接口调用凭证超时时间，单位（秒）  
    //refresh_token 用户刷新access_token  
    //openid    用户唯一标识，请注意，在未关注公众号时，用户访问公众号的网页，也会产生一个用户和公众号唯一的OpenID  
    //scope 用户授权的作用域，使用逗号（,）分隔  
    public string access_token { get; set; }  
    public string expires_in { get; set; }  
    public string refresh_token { get; set; }  
    public string openid { get; set; }  
    public string scope { get; set; }  
  
}  
    public class OAuthUser  
{  
    public OAuthUser()  
    { }  
    #region 数据库字段  
    private string _openID;  
    private string _searchText;  
    private string _nickname;  
    private string _sex;  
    private string _province;  
    private string _city;  
    private string _country;  
    private string _headimgUrl;  
    private string _privilege;  
    #endregion  
 
    #region 字段属性  
    /// <summary>  
    /// 用户的唯一标识  
    /// </summary>  
    public string openid  
    {  
        set { _openID = value; }  
        get { return _openID; }  
    }  
    /// <summary>  
    ///   
    /// </summary>  
    public string SearchText  
    {  
        set { _searchText = value; }  
        get { return _searchText; }  
    }  
    /// <summary>  
    /// 用户昵称   
    /// </summary>  
    public string nickname  
    {  
        set { _nickname = value; }  
        get { return _nickname; }  
    }  
    /// <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 string sex  
    {  
        set { _sex = value; }  
        get { return _sex; }  
    }  
    /// <summary>  
    /// 用户个人资料填写的省份  
    /// </summary>  
    public string province  
    {  
        set { _province = value; }  
        get { return _province; }  
    }  
    /// <summary>  
    /// 普通用户个人资料填写的城市   
    /// </summary>  
    public string city  
    {  
        set { _city = value; }  
        get { return _city; }  
    }  
    /// <summary>  
    /// 国家，如中国为CN   
    /// </summary>  
    public string country  
    {  
        set { _country = value; }  
        get { return _country; }  
    }  
    /// <summary>  
    /// 用户头像，最后一个数值代表正方形头像大小（有0、46、64、96、132数值可选，0代表640*640正方形头像），用户没有头像时该项为空  
    /// </summary>  
    public string headimgurl  
    {  
        set { _headimgUrl = value; }  
        get { return _headimgUrl; }  
    }  
    /// <summary>  
    /// 用户特权信息，json 数组，如微信沃卡用户为（chinaunicom）其实这个格式称不上JSON，只是个单纯数组  
    /// </summary>  
    public string privilege  
    {  
        set { _privilege = value; }  
        get { return _privilege; }  
    }  
    #endregion  
}
    public class JsonHelper
    {
        /// <summary>  
        /// 生成Json格式  
        /// </summary>  
        /// <typeparam name="T"></typeparam>  
        /// <param name="obj"></param>  
        /// <returns></returns>  
        public static string GetJson<T>(T obj)
        {
            DataContractJsonSerializer json = new DataContractJsonSerializer(obj.GetType());
            using (MemoryStream stream = new MemoryStream())
            {
                json.WriteObject(stream, obj);
                string szJson = Encoding.UTF8.GetString(stream.ToArray()); return szJson;
            }
        }
        /// <summary>  
        /// 获取Json的Model  
        /// </summary>  
        /// <typeparam name="T"></typeparam>  
        /// <param name="szJson"></param>  
        /// <returns></returns>  
        public static T ParseFromJson<T>(string szJson)
        {
            T obj = Activator.CreateInstance<T>();
            using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(szJson)))
            {
                DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
                return (T)serializer.ReadObject(ms);
            }
        }
    }  

    
}