asp.net调用微信扫一扫功能

标签：nal   system   相关   creat   menuitem   base   barcode   编码   ast   

1、页面引用http://res.wx.qq.com/open/js/jweixin-1.0.0.js

2、前台代码

function shaomiao() {
            wx.config({
                debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
                appId: ‘‘, // 必填，公众号的唯一标识
                timestamp: ‘<%=time %>‘, // 必填，生成签名的时间戳(随便填写)
                nonceStr: ‘<%=randstr %>‘, // 必填，生成签名的随机串(随便填写)
                signature: ‘<%=signstr %>‘, // 必填，签名，见附录1
                jsApiList: [‘checkJsApi‘,
                ‘onMenuShareTimeline‘,
                ‘onMenuShareAppMessage‘,
                ‘onMenuShareQQ‘,
                ‘onMenuShareWeibo‘,
                ‘hideMenuItems‘,
                ‘showMenuItems‘,
                ‘hideAllNonBaseMenuItem‘,
                ‘showAllNonBaseMenuItem‘,
                ‘translateVoice‘,
                ‘startRecord‘,
                ‘stopRecord‘,
                ‘onRecordEnd‘,
                ‘playVoice‘,
                ‘pauseVoice‘,
                ‘stopVoice‘,
                ‘uploadVoice‘,
                ‘downloadVoice‘,
                ‘chooseImage‘,
                ‘previewImage‘,
                ‘uploadImage‘,
                ‘downloadImage‘,
                ‘getNetworkType‘,
                ‘openLocation‘,
                ‘getLocation‘,
                ‘hideOptionMenu‘,
                ‘showOptionMenu‘,
                ‘closeWindow‘,
                ‘scanQRCode‘,
                ‘chooseWXPay‘,
                ‘openProductSpecificView‘,
                ‘addCard‘,
                ‘chooseCard‘,
                ‘openCard‘
                ] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
            });
            wx.ready(function () {
                // config信息验证后会执行ready方法，所有接口调用都必须在config接口获得结果之后，config是一个客户端的异步操作，所以如果需要在页面加载时就调用相关接口，则须把相关接口放在ready函数中调用来确保正确执行。对于用户触发时才调用的接口，则可以直接调用，不需要放在ready函数中。
                wx.scanQRCode({
                    needResult: 1, // 默认为0，扫描结果由微信处理，1则直接返回扫描结果，
                    scanType: ["qrCode", "barCode"], // 可以指定扫二维码还是一维码，默认二者都有
                    success: function (res) {

                        result = res.resultStr; // 当needResult 为 1 时，扫码返回的结果
                        if (typeof (result) != "undefined") {                                
                                //result  扫描后的值
             }
                    }
                });

            });
            wx.error(function (res) {

                // config信息验证失败会执行error函数，如签名过期导致验证失败，具体错误信息可以打开config的debug模式查看，也可以在返回的res参数中查看，对于SPA可以在这里更新签名。

            });
        }

3、后台代码

public string time = "";
        public string randstr = "";
        public string signstr = "";
        protected void Page_Load(object sender, EventArgs e)
        {

            if (!IsPostBack)
            {
                //调用微信二维码扫描
                Response.Cache.SetNoStore();
                string[] str = wxHelper.GetWXInfo(this.Request.Url.ToString()).Split(‘,‘);
                time = str[0];
                randstr = str[1];
                signstr = str[2];

                
            }
          
        }

4、wxHelper类

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;
using System.Text.RegularExpressions;
using System.IO;
using System.Collections.Generic;
using System.Net;

/// <summary>
/// wxHelper 的摘要说明
/// </summary>
public partial class wxHelper
{
    /// <summary>
    /// 签名生成时间
    /// </summary>
    public static string dtime = "";
    /// <summary>
    /// 签名提交url地址
    /// </summary>
    public static string url = "";
    /// <summary>
    /// 生成签名的时间戳
    /// </summary>
    public static string time = "";
    /// <summary>
    /// 生成签名的随机串
    /// </summary>
    public static string randstr = "";
    /// <summary>
    /// 签名
    /// </summary>
    public static string signstr = "";
    /// <summary>
    /// appid
    /// </summary>
    private readonly static string appid = "******";
    /// <summary>
    /// secret
    /// </summary>
    private readonly static string secret = "******";
	public wxHelper()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}


    /// <summary>
    /// 获得accesstoken
    /// </summary>
    /// <returns></returns>
    public static string AccessToken()
    {
        return SendRequest("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+appid+"&secret="+secret, Encoding.UTF8);
    }

    /// <summary>
    /// 根据accesstoken获得ticket
    /// </summary>
    /// <returns></returns>
    public static string GetTicket()
    {
        string access_token = AccessToken();
        string url1 = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + access_token.Substring(access_token.IndexOf(‘:‘) + 2, access_token.IndexOf(‘,‘) - 3 - access_token.IndexOf(‘:‘)) + "&type=jsapi";
        string requstStr = SendRequest(url1, Encoding.UTF8);
        string ticket = requstStr.Substring(requstStr.IndexOf("ticket") + 9, requstStr.LastIndexOf(‘,‘) - 1 - requstStr.IndexOf("ticket") - 9);// 获得json参数没搞，懂的自己优化
        return ticket;
    }

   /// <summary>
    /// 获取jssdk所需签名
   /// </summary>
   /// <returns></returns>
    public static string GetSignature(string link, string noncestr, int timestamp)
    {
        DateTime dti = DateTime.Now;
        dtime = dti.ToString("yyyy-MM-dd HH:mm:ss");
        string ticket = GetTicket();
        time = "1510124527";
        randstr = noncestr;

        string string1 = "jsapi_ticket=" + ticket + "&noncestr=" + noncestr + "&timestamp=" + timestamp + "&url=" + link;
        url = string1;
        string signature = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(string1, "SHA1");
        return signature.ToLower(); // 生成后一定转换为小写
    }

    /// <summary>   
    /// Get方式获取url地址输出内容   
    /// </summary> /// <param name="url">url</param>   
    /// <param name="encoding">返回内容编码方式，例如：Encoding.UTF8</param>   
    public static string SendRequest(string url, Encoding encoding)
    {
        HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
        webRequest.Method = "GET";
        HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
        StreamReader sr = new StreamReader(webResponse.GetResponseStream(), encoding);
        string str = sr.ReadToEnd();
        return str;
    }

  

    /// <summary>
    /// 获得微信权限信息，格式：时间戳,随机数,签名
    /// </summary>
    /// <param name="link"></param>
    /// <returns></returns>
    public static string GetWXInfo(string link)
    {
        DateTime dti = DateTime.Now;
        dtime = dti.ToString("yyyy-MM-dd HH:mm:ss");
        string noncestr = dti.ToString("yyyyMMddHHmmss");
        int timestamp = 1510124527;
        string ticket = GetTicket();
        time = "1510124527";
        randstr = noncestr;
        signstr = GetSignature(link, noncestr, timestamp);
        return time + "," + randstr + "," + signstr;
    }
}

5、登陆微信公众号设置JS接口安全域名

asp.net调用微信扫一扫功能

标签：nal   system   相关   creat   menuitem   base   barcode   编码   ast   

原文地址：http://www.cnblogs.com/fuqiang88/p/7472407.html