C#实现微信结合百度api获取当前用户地理位置的方法

本文实例讲述了c#实现微信结合百度api获取当前用户地理位置的方法。分享给大家供大家参考，具体如下：

操作步骤：

1. 先根据微信提供的接口文档获取到经纬度

参考文档地址：

2. 由于直接使用微信获取到的经纬度，来使用百度地图api获取地址存在500~1000米的偏差，有时候定位不是很准确，所以需要转换成百度的坐标

参考文档地址：

3. 根据百度api实现逆地址解析，获取当前位置

参考文档地址：

具体实例：

该例子是mvc项目

1. wx_location.cshtml页面：

@using system.web.optimization;
@{
 layout = "~/views/shared/master/_app.cshtml";
}
@section head{
}
<div data-role="page">
 <div data-role="header" id="header" data-position="fixed">
  <h1>微信定位页面</h1>
 </div>
 <div data-role="content" class="ui-content">
  <form id="add" method="post" onsubmit="return false">
   <table border="0" cellpadding="0" cellspacing="0" class="register_table">
    <tr class='tr_bg neiy'>
<td class='tdl neiy'>定位：</td>
<td class='tdr'><input id='txt_dw' name='dw' type='text' placeholder='正在定位' class='td_input' value='' /></td></tr>
   </table>
   <div data-role="footer" data-position="fixed" data-id="footernav">
    <div data-role="navbar">
     <ul>
      <li><a href="" style=" rel="external nofollow" font-size: 1em;">返回主页</a></li>
     </ul>
    </div>
   </div>
   @html.antiforgerytoken()
  </form>
 </div>
</div>
@section scripts{
  @*微信js-sdk*@
 <script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js" type="text/javascript"></script>
 <script type="text/javascript">
  //微信jssdk配置
  wx.config({
   debug: false,
   appid: "",
   timestamp: "@html.raw(viewdata["timestamp"])",
   noncestr: "@html.raw(viewdata["noncestr"])",
   signature: "@html.raw(viewdata["signature"])",
   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'
   ]
  });
  //wx.error(function (res) {
  // alert("错误：" + res);
  //});
  wx.checkjsapi({
   jsapilist: [
     'getlocation',
   ],
   success: function (res) {
    if (res.checkresult.getlocation == false) {
     alert('你的微信版本太低，不支持微信js接口，请升级到最新的微信版本！');
     return;
    }
   }
  });
  wx.ready(function () {
   wx.getlocation({
    type: 'wgs84', // 默认为wgs84的gps坐标，如果要返回直接给openlocation用的火星坐标，可传入'gcj02'
    success: function (res) {
     var latitude = res.latitude; // 纬度，浮点数，范围为90 ~ -90
     var longitude = res.longitude; // 经度，浮点数，范围为180 ~ -180。
     var speed = res.speed; // 速度，以米/每秒计
     var accuracy = res.accuracy; // 位置精度
     //alert(latitude + "。" + longitude);
     //获取到经纬度之后，异步去后台加载出来真实的地理位置
     $.post("/app/common/getlocation", { lat: latitude, lon: longitude },
      function (data) {
       //把返回回来的地理位置显示在页面的控件里面
       $("#txt_dw").val(data);
      }, 'html');
    },
    cancel: function (res) {
     alert('用户拒绝授权获取地理位置');
    }
   });
  });
 </script>
}

2.

/// <summary>
/// 微信定位
/// </summary>
/// <returns></returns>
public actionresult wx_location()
{
   #region 获取定位所需要的参数
   //jssdk js接口安全域名填写，
   //access_token来获取jsapi_ticket
   string ticket = getticket();
   var timestamp = tenpayutil.gettimestamp();
   var noncestr = tenpayutil.getnoncestr();
   //设置参数
   requesthandler paysignreqhandler = new requesthandler(system.web.httpcontext.current);
   //参数顺序。
   paysignreqhandler.setparameter("jsapi_ticket", ticket);
   paysignreqhandler.setparameter("noncestr", noncestr);
   paysignreqhandler.setparameter("timestamp", timestamp);
   paysignreqhandler.setparameter("url", request.url.absoluteuri);//url#号后不要
   // loghelper.writeinfolog("noncestr:" + noncestr + "。jsapi_ticked:" + ticket + "。timestamp:" + timestamp + "。url:"+request.url.absoluteuri + "。");
   viewdata["signature"] = paysignreqhandler.createsha1sign();
   //loghelper.writeinfolog("signature:" + paysignreqhandler.createsha1sign());
   viewdata["timestamp"] = timestamp;
   viewdata["noncestr"] = noncestr;
   #endregion
   return view();
}

3. 获取地理位置方法

#region 获取地理位置
public actionresult getlocation(string lat, string lon)
{
   //23.1294。113.3761
   loghelper.writeinfolog(lat + "。" + lon);
   string x = string.empty, y = string.empty, strreturn = string.empty;
   #region 先把微信经纬度（23.12536。113.36684 ）转换成百度坐标
   string apiurl = "http://api.map.baidu.com/geoconv/v1/?coords=" + lon + "," + lat + "&from=1&to=5&ak=你的百度地图api密钥";
   webrequest request = webrequest.create(@apiurl);
   request.method = "post";
   webresponse response = request.getresponse();
   stream stream = response.getresponsestream();
   encoding encode = encoding.utf8;
   streamreader reader = new streamreader(stream, encode);
   string detail = reader.readtoend();
   var jd = jsonconvert.deserializeobject<baiducoordinates>(detail);
   list<bc_result> result = jd.result;
   foreach (var item in result)
   {
    x = item.x;
    y = item.y;
   }
   #endregion
   #region 通过得到的百度坐标进行逆地址解析获取到真实的地理位置
   apiurl = "http://api.map.baidu.com/geocoder/v2/?ak=8aocgagfz0r4mantipnitji0&callback=renderreverse&location=" + y + "," + x + "&output=json&pois=1";
   #region 通过传入的参数得到url请求
   request = webrequest.create(@apiurl);
   request.method = "post";
   response = request.getresponse();
   stream = response.getresponsestream();
   encode = encoding.utf8;
   reader = new streamreader(stream, encode);
   detail = reader.readtoend();
   //@"(?is)(?<=)(.∗)(?=)";//(?is)
   // string results = system.text.regularexpressions.regex.replace(detail, @"(?is)(?<=)(.∗)(?=)", "$2");
   string results = regex.match(detail, @"(?is)(?<=)(.∗)(?=)").result("$1");
   jsondata jsondta = jsonmapper.toobject(results);
   jsondata jditems = jsondta["result"];
   //获取结构化地址信息
   strreturn = (string)jditems["formatted_address"];
   loghelper.writeinfolog(strreturn);
   #endregion
   #endregion
   return content(strreturn);
}
#endregion

涉及到的相关方法以及类：

1. 获取ticket

#region w微信js-sdk权限签名
public string getticket()
{
   #region 通过 appid + appsecert 获取公众号的 access_token（不是用户的 access_token）
   string apiurl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + tenpayutil.appid + "&secret=" + tenpayutil.appsecret;
   #region 通过传入的参数得到url请求
   webrequest request = webrequest.create(@apiurl);
   request.method = "post";
   webresponse response = request.getresponse();
   stream stream = response.getresponsestream();
   encoding encode = encoding.utf8;
   streamreader reader = new streamreader(stream, encode);
   string detail = reader.readtoend();
   var jd = jsonconvert.deserializeobject<wx_jssdk>(detail);
   string access_token = (string)jd.access_token;
   session["access_token"] = access_token;
   #endregion
   #endregion
   #region 获取ticket
   apiurl = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + access_token + "&type=jsapi";
   request = webrequest.create(@apiurl);
   response = request.getresponse();
   stream = response.getresponsestream();
   encode = encoding.utf8;
   reader = new streamreader(stream, encode);
   detail = reader.readtoend();
   jd = jsonconvert.deserializeobject<wx_jssdk>(detail);
   string ticket = jd.ticket;
   session["ticket"] = ticket;
   #endregion
   return ticket;
}
#endregion

2. tenpayutil类

/// <summary>
/// tenpayutil 的摘要说明。
/// 配置文件
/// </summary>
public class tenpayutil
{
    public static string tenpay = "1";
    //财付通商户号
    public static string partner = "";/
    //财付通密钥
    public static string key = "";
    //微信appsecret
    public static string appsecret = "";
    //微信appid
    public static string appid = "";
    //paysignkey(非appkey)
    public static string appkey = "";
    //支付完成后的回调处理页面,*替换成notify_url.asp所在路径
    public static string tenpay_notify = "";
    public tenpayutil()
    {
    }
    public static string getnoncestr()
    {
      random random = new random();
      return md5util.getmd5(random.next(1000).tostring(), "gbk");
    }
    public static string gettimestamp()
    {
      timespan ts = datetime.utcnow - new datetime(1970, 1, 1, 0, 0, 0, 0);
      return convert.toint64(ts.totalseconds).tostring();
    }
    /** 对字符串进行url编码 */
    public static string urlencode(string instr, string charset)
    {
      //return instr;
      if (instr == null || instr.trim() == "")
        return "";
      else
      {
        string res;
        try
        {
          res = httputility.urlencode(instr, encoding.getencoding(charset));
        }
        catch (exception ex)
        {
          res = httputility.urlencode(instr, encoding.getencoding("gb2312"));
        }
        return res;
      }
    }
    /** 对字符串进行url解码 */
    public static string urldecode(string instr, string charset)
    {
      if (instr == null || instr.trim() == "")
        return "";
      else
      {
        string res;
        try
        {
          res = httputility.urldecode(instr, encoding.getencoding(charset));
        }
        catch (exception ex)
        {
          res = httputility.urldecode(instr, encoding.getencoding("gb2312"));
        }
        return res;
      }
    }
    /** 取时间戳生成随即数,替换交易单号中的后10位流水号 */
    public static uint32 unixstamp()
    {
      timespan ts = datetime.now - timezone.currenttimezone.tolocaltime(new datetime(1970, 1, 1));
      return convert.touint32(ts.totalseconds);
    }
    /** 取随机数 */
    public static string buildrandomstr(int length)
    {
      random rand = new random();
      int num = rand.next();
      string str = num.tostring();
      if (str.length > length)
      {
        str = str.substring(0, length);
      }
      else if (str.length < length)
      {
        int n = length - str.length;
        while (n > 0)
        {
          str.insert(0, "0");
          n--;
        }
      }
      return str;
    }
}

3. requesthandler类

/**
'签名工具类
============================================================================/// <summary>
'api说明：
'init();
'初始化函数，默认给一些参数赋值。
'setkey(key_)'设置商户密钥
'createmd5sign(signparams);字典生成md5签名
'genpackage(packageparams);获取package包
'createsha1sign(signparams);创建签名sha1
'parsexml();输出xml
'getdebuginfo(),获取debug信息
*
* ============================================================================
*/
public class requesthandler
{
    public requesthandler(httpcontext httpcontext)
    {
      parameters = new hashtable();
      this.httpcontext = httpcontext;
    }
    /** 密钥 */
    private string key;
    protected httpcontext httpcontext;
    /** 请求的参数 */
    protected hashtable parameters;
    /** debug信息 */
    private string debuginfo;
    /** 初始化函数 */
    public virtual void init()
    {
    }
    /** 获取debug信息 */
    public string getdebuginfo()
    {
      return debuginfo;
    }
    /** 获取密钥 */
    public string getkey()
    {
      return key;
    }
    /** 设置密钥 */
    public void setkey(string key)
    {
      this.key = key;
    }
    /** 设置参数值 */
    public void setparameter(string parameter, string parametervalue)
    {
      if (parameter != null && parameter != "")
      {
        if (parameters.contains(parameter))
        {
          parameters.remove(parameter);
        }
        parameters.add(parameter, parametervalue);
      }
    }
    //获取package带参数的签名包
    public string getrequesturl()
    {
      this.createsign();
      stringbuilder sb = new stringbuilder();
      arraylist akeys = new arraylist(parameters.keys);
      akeys.sort();
      foreach (string k in akeys)
      {
        string v = (string)parameters[k];
        if (null != v && "key".compareto(k) != 0)
        {
          sb.append(k + "=" + tenpayutil.urlencode(v, getcharset()) + "&");
        }
      }
      //去掉最后一个&
      if (sb.length > 0)
      {
        sb.remove(sb.length - 1, 1);
      }
      return sb.tostring();
    }
    //创建md5摘要,规则是:按参数名称a-z排序,遇到空值的参数不参加签名。
    protected virtual void createsign()
    {
      stringbuilder sb = new stringbuilder();
      arraylist akeys = new arraylist(parameters.keys);
      akeys.sort();
      foreach (string k in akeys)
      {
        string v = (string)parameters[k];
        if (null != v && "".compareto(v) != 0
          && "sign".compareto(k) != 0 && "key".compareto(k) != 0)
        {
          sb.append(k + "=" + v + "&");
        }
      }
      sb.append("key=" + this.getkey());
      string sign = md5util.getmd5(sb.tostring(), getcharset()).toupper();
      this.setparameter("sign", sign);
      //debug信息
      this.setdebuginfo(sb.tostring() + " => sign:" + sign);
    }
    //创建package签名
    public virtual string createmd5sign(string key, string value)
    {
      stringbuilder sb = new stringbuilder();
      arraylist akeys = new arraylist(parameters.keys);
      akeys.sort();
      foreach (string k in akeys)
      {
        string v = (string)parameters[k];
        if (null != v && "".compareto(v) != 0
          && "sign".compareto(k) != 0 && "key".compareto(k) != 0)
        {
          sb.append(k + "=" + v + "&");
        }
      }
      sb.append(key + "=" + value);
      string sign = md5util.getmd5(sb.tostring(), getcharset()).toupper();
      return sign;
    }
    //创建sha1签名
    public string createsha1sign()
    {
      stringbuilder sb = new stringbuilder();
      arraylist akeys = new arraylist(parameters.keys);
      akeys.sort();
      foreach (string k in akeys)
      {
        string v = (string)parameters[k];
        if (null != v && "".compareto(v) != 0
            && "sign".compareto(k) != 0 && "key".compareto(k) != 0)
        {
          if (sb.length == 0)
          {
            sb.append(k + "=" + v);
          }
          else
          {
            sb.append("&" + k + "=" + v);
          }
        }
      }
      string paysign = sha1util.getsha1(sb.tostring()).tostring().tolower();
      //debug信息
      this.setdebuginfo(sb.tostring() + " => sign:" + paysign);
      return paysign;
    }
    public string getbizsign()
    {
      dictionary<string, string> bizparameters = new dictionary<string, string>();
      arraylist akeys = new arraylist(parameters.keys);
      akeys.sort();
      foreach (string k in akeys)
      {
        string v = (string)parameters[k];
        if (!string.isnullorempty(k))
        {
          bizparameters.add(k.tolower(), v);
        }
      }
      if (!bizparameters.any(p => p.key.tolower() == "appkey"))
        bizparameters.add("appkey", tenpayutil.appkey);
      string bizstring = formatbizqueryparamap(bizparameters, false);
      return sha1util.sha1(bizstring);
    }
    public string formatbizqueryparamap(dictionary<string, string> paramap, bool urlencode)
    {
      string buff = "";
      try
      {
        var result = from pair in paramap orderby pair.key select pair;
        foreach (keyvaluepair<string, string> pair in result)
        {
          if (pair.key != "")
          {
            string key = pair.key;
            string val = pair.value;
            if (urlencode)
            {
              val = system.web.httputility.urlencode(val);
            }
            buff += key.tolower() + "=" + val + "&";
          }
        }
        if (buff.length == 0 == false)
        {
          buff = buff.substring(0, (buff.length - 1) - (0));
        }
      }
      catch (exception e)
      {
        throw e;
        //throw new sdkruntimeexception(e.message);
      }
      return buff;
    }
    //输出xml
    public string parsexml()
    {
      stringbuilder sb = new stringbuilder();
      sb.append("<xml>");
      int iisnumber = 0;
      foreach (string k in parameters.keys)
      {
        string v = (string)parameters[k];
        if (int.tryparse(v, out iisnumber))
        {
          sb.append("<" + k + ">" + v + "</" + k + ">");
        }
        else
        {
          sb.append("<" + k + "><![cdata[" + v + "]]></" + k + ">");
        }
      }
      sb.append("</xml>");
      return sb.tostring();
    }
    /** 设置debug信息 */
    public void setdebuginfo(string debuginfo)
    {
      this.debuginfo = debuginfo;
    }
    public hashtable getallparameters()
    {
      return this.parameters;
    }
    protected virtual string getcharset()
    {
      return this.httpcontext.request.contentencoding.bodyname;
    }
}

4. 实体

#region 微信sdk
public partial class wx_jssdk
{
  public string access_token { get; set; }
  public string ticket { get; set; }
}
#endregion
#region 百度坐标转换
public partial class baiducoordinates
{
  public string status { get; set; }
  public list<bc_result> result { get; set; }
}
public partial class bc_result
{
  public string x { get; set; }
  public string y { get; set; }
}
#endregion

更多关于c#相关内容感兴趣的读者可查看本站专题：《c#常见控件用法教程》、《winform控件用法总结》、《c#数据结构与算法教程》、《c#面向对象程序设计入门教程》及《c#程序设计之线程使用技巧总结》

希望本文所述对大家c#程序设计有所帮助。