前提是你所使用的微信公衆號已經有獲取用戶信息的權限,
這段代碼的問題是:沒有緩存accessToken,accessToken每天獲取的上限是2000次
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;
using Newtonsoft.Json;
namespace WeiXinTest.Models
{
/// <summary>
/// 微信工具類
/// </summary>
public class WeiXinHelper
{
#region 獲取Token
/// <summary>
/// 獲取Token
/// </summary>
public static string GetToken(string appid, string secret)
{
string strJson =RequestUrl(string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appid, secret));
return GetJsonValue(strJson, "access_token");
}
#endregion
#region 獲取關注者OpenID集合
/// <summary>
/// 獲取關注者OpenID集合
/// </summary>
public static List<string> GetOpenIDs(string access_token)
{
List<string> result = new List<string>();
List<string> openidList = GetOpenIDs(access_token, null);
result.AddRange(openidList);
while (openidList.Count > 0)
{
openidList = GetOpenIDs(access_token, openidList[openidList.Count - 1]);
result.AddRange(openidList);
}
return result;
}
/// <summary>
/// 獲取關注者OpenID集合
/// </summary>
public static List<string> GetOpenIDs(string access_token, string next_openid)
{
// 設置參數
string url = string.Format("https://api.weixin.qq.com/cgi-bin/user/get?access_token={0}&next_openid={1}", access_token, string.IsNullOrWhiteSpace(next_openid) ? "" : next_openid);
string returnStr = RequestUrl(url);
int count = int.Parse(GetJsonValue(returnStr, "count"));
if (count > 0)
{
string startFlg = "\"openid\":[";
int start = returnStr.IndexOf(startFlg) + startFlg.Length;
int end = returnStr.IndexOf("]", start);
string openids = returnStr.Substring(start, end - start).Replace("\"", "");
return openids.Split(',').ToList<string>();
}
else
{
return new List<string>();
}
}
#endregion
#region 獲取Json字符串某節點的值
/// <summary>
/// 獲取Json字符串某節點的值
/// </summary>
public static string GetJsonValue(string jsonStr, string key)
{
string result = string.Empty;
if (!string.IsNullOrEmpty(jsonStr))
{
key = "\"" + key.Trim('"') + "\"";
int index = jsonStr.IndexOf(key) + key.Length + 1;
if (index > key.Length + 1)
{
//先截逗號,若是最後一個,截“}”號,取最小值
int end = jsonStr.IndexOf(',', index);
if (end == -1)
{
end = jsonStr.IndexOf('}', index);
}
result = jsonStr.Substring(index, end - index);
result = result.Trim(new char[] { '"', ' ', '\'' }); //過濾引號或空格
}
}
return result;
}
#endregion
#region 請求Url
#region 請求Url,不發送數據
/// <summary>
/// 請求Url,不發送數據
/// </summary>
public static string RequestUrl(string url)
{
return RequestUrl(url, "POST");
}
#endregion
#region 請求Url,不發送數據
/// <summary>
/// 請求Url,不發送數據
/// </summary>
public static string RequestUrl(string url, string method)
{
// 設置參數
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = method;
request.ContentType = "text/html";
request.Headers.Add("charset", "utf-8");
//發送請求並獲取相應迴應數據
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序纔開始向目標網頁發送Post請求
Stream responseStream = response.GetResponseStream();
StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);
//返回結果網頁(html)代碼
string content = sr.ReadToEnd();
return content;
}
#endregion
#region 請求Url,發送數據
/// <summary>
/// 請求Url,發送數據
/// </summary>
public static string PostUrl(string url, string postData)
{
byte[] data = Encoding.UTF8.GetBytes(postData);
// 設置參數
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
Stream outstream = request.GetRequestStream();
outstream.Write(data, 0, data.Length);
outstream.Close();
//發送請求並獲取相應迴應數據
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序纔開始向目標網頁發送Post請求
Stream instream = response.GetResponseStream();
StreamReader sr = new StreamReader(instream, Encoding.UTF8);
//返回結果網頁(html)代碼
string content = sr.ReadToEnd();
return content;
}
#endregion
#endregion
#region Http下載文件
/// <summary>
/// Http下載文件
/// </summary>
public static string HttpDownloadFile(string url, string path)
{
// 設置參數
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
//發送請求並獲取相應迴應數據
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序纔開始向目標網頁發送Post請求
Stream responseStream = response.GetResponseStream();
//創建本地文件寫入流
Stream stream = new FileStream(path, FileMode.Create);
byte[] bArr = new byte[1024];
int size = responseStream.Read(bArr, 0, (int)bArr.Length);
while (size > 0)
{
stream.Write(bArr, 0, size);
size = responseStream.Read(bArr, 0, (int)bArr.Length);
}
stream.Close();
responseStream.Close();
return path;
}
#endregion
#region Http上傳文件
/// <summary>
/// Http上傳文件
/// </summary>
public static string HttpUploadFile(string url, string path)
{
// 設置參數
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
string endPath = System.Web.HttpContext.Current.Server.MapPath(path);
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = "POST";
string boundary = DateTime.Now.Ticks.ToString("X"); // 隨機分隔線
request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
int pos = path.LastIndexOf("\\");
string fileName = path.Substring(pos + 1);
//請求頭部信息
StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());
FileStream fs = new FileStream(endPath, FileMode.Open, FileAccess.Read);
byte[] bArr = new byte[fs.Length];
fs.Read(bArr, 0, bArr.Length);
fs.Close();
Stream postStream = request.GetRequestStream();
postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
postStream.Write(bArr, 0, bArr.Length);
postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
postStream.Close();
//發送請求並獲取相應迴應數據
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序纔開始向目標網頁發送Post請求
Stream instream = response.GetResponseStream();
StreamReader sr = new StreamReader(instream, Encoding.UTF8);
//返回結果網頁(html)代碼
string content = sr.ReadToEnd();
return content;
}
#endregion
#region 獲取所有關注者的用戶信息
/// <summary>
/// 獲取所有關注者的用戶信息
/// </summary>
/// <returns></returns>
public static List<UserMessage>GetUserMessageList()
{
/// <summary>
/// 微信開發者 AppId
/// </summary>
string AppId = "***************";
/// <summary>
/// 微信開發者 Secret
/// </summary>
string Secret = "**********************";
//第一步獲取accessToken
string accessToken = WeiXinHelper.GetToken(AppId, Secret);
//第二部根據accessToken獲取用戶openId
List<string> list = WeiXinHelper.GetOpenIDs(accessToken);
//根據Openid獲取用戶信息
List<UserMessage> listUser = new List<UserMessage>();
foreach (var OpenId in list.Take(10))
{
string url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=" + accessToken + "&openid=" + OpenId + "&lang=zh_CN";
string returnText = WeiXinHelper.RequestUrl(url);
UserMessage Entity = JsonConvert.DeserializeObject<UserMessage>(returnText);
listUser.Add(Entity);
}
return listUser;
}
#endregion
}
/// <summary>
/// 獲取用戶信息實體
/// </summary>
public class UserMessage
{
/// <summary>
/// 用戶是否訂閱該公衆號標識,值爲0時,代表此用戶沒有關注該公衆號,拉取不到其餘信息。
/// </summary>
public string subscribe { get; set; }
/// <summary>
/// 用戶的標識,對當前公衆號唯一
/// </summary>
public string openid { get; set; }
/// <summary>
/// 用戶的暱稱
/// </summary>
public string nickname { get; set; }
/// <summary>
/// 用戶的性別,值爲1時是男性,值爲2時是女性,值爲0時是未知
/// </summary>
public string sex { get; set; }
/// <summary>
/// 用戶所在城市
/// </summary>
public string city { get; set; }
/// <summary>
/// 用戶所在國家
/// </summary>
public string country { get; set; }
/// <summary>
/// 用戶所在省份
/// </summary>
public string province { get; set; }
/// <summary>
/// 用戶所用語言
/// </summary>
public string language { get; set; }
/// <summary>
/// 用戶頭像
/// </summary>
public string headimgurl { get; set; }
/// <summary>
/// 用戶關注時間戳
/// </summary>
public string subscribe_time { get; set; }
public string unionid { get; set; }
/// <summary>
/// 備註
/// </summary>
public string remark { get; set; }
/// <summary>
/// 分組id
/// </summary>
public string groupid { get; set; }
}
}