1、微信小程序获取Access_token:
access_token具体时效看官方文档。
using System; using System.Collections.Generic; using System.Linq; using System.Threading; using System.Web; using TT.Utilities; namespace DjwzApi.Com { public class WeChatApi { public static string AppID = TT.Utilities.Config.ConfigureAppConfig.GetAppSettingsKeyValue("AppID"); public static string AppSecret = TT.Utilities.Config.ConfigureAppConfig.GetAppSettingsKeyValue("AppSecret"); private static string Access_token = ""; private static DateTime Expires_in_time = DateTime.Now; static object lockObj = new object(); /// <summary> /// 获取Access_token /// </summary> /// <param name="AppID"></param> /// <param name="AppSecret"></param> /// <returns></returns> public static string GetAccess_token(string AppID = null, string AppSecret = null) { lock (lockObj) { if (string.IsNullOrEmpty(Access_token) || ((DateTime.Now - Expires_in_time).TotalSeconds >= -30)) { lock (lockObj) { Access_token = ""; Expires_in_time = DateTime.Now; AppID = AppID ?? WeChatApi.AppID; AppSecret = AppSecret ?? WeChatApi.AppSecret; string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}"; url = string.Format(url, AppID, AppSecret); var json = ""; try { json = TT.Utilities.Web.HttpClientUti.DoGet(url); } catch (Exception ex) { System.Threading.Tasks.Task.Factory.StartNew(() => utils.LogHelper.WriteLog(ex.Message)); throw new Exception("获取微信端access_token失败," + ex.Message); } //{"access_token":"12_TrAgGuiF64W8XPRXyFRFUK7SjzZptoa3ogS4mGKp-W-ni6dG_OoMNMbm_7q9lhYcx85xh-SNe3BUC_6Lg1H6FDMU7fUsKoG4NwN5EA-NVOCVUZg0OIdTvOmgHMgCxJQ1vWP__VvId4AJ2Bm_QYPdABAFNE","expires_in":7200} dynamic obj = new { access_token = "", expires_in = 0, errcode = 0, errmsg = "" }; obj = TT.Utilities.Json.JsonHelper.DeserializeAnonymousType(json, obj); if (obj.errcode == 0) { Expires_in_time = DateTime.Now.AddSeconds(obj.expires_in); Access_token = obj.access_token; } return Access_token; } } else { return Access_token; } } } } }
2、获取二维码
这里实现了官网文档中提到的 接口A和接口C
using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Net; using System.Text; using System.Web; namespace DjwzApi.Com { public class WxQrcode { private const string line_color = "{\"r\":\"0\",\"g\":\"0\",\"b\":\"0\"}"; /// <summary> /// 接口A: 生成小程序码, 适用于需要的码数量较少的业务场景 /// </summary> /// <returns></returns> public static string QrcodeA(string path, int width = 430, bool auto_color = false, string line_color = line_color, bool is_hyaline = false) { string url = "https://api.weixin.qq.com/wxa/getwxacode?access_token={0}"; var ACCESS_TOKEN = WeChatApi.GetAccess_token(); url = string.Format(url, ACCESS_TOKEN); var arg = new Dictionary<string, string> { {"path",