1.首先调用接口,要有一个post数据到指定url并返回数据的函数:

    protected string PostXmlToUrl(string url, string postData)
    {
        string returnmsg = "";
        using (System.Net.WebClient wc = new System.Net.WebClient())
        {
            returnmsg = wc.UploadString(url, "POST", postData);
        }
        return returnmsg;
    }

post的数据格式可以是

url的参数格式(a=1&b=2&c=3....)

xml格式(<xml>....</xml>)

返回的数据格式由接口确定。

2.方法调用:

        post_data = wxPayBaseHelper.UnifiedPayOrder(wxobPay, key);

        requestData = PostXmlToUrl("https://api.mch.weixin.qq.com/pay/unifiedorder", post_data);

这里post_data是一段xml字符串:

<xml>
   <appid>wx2421b1c4370ec43b</appid>
   <attach>支付测试</attach>
   <body>JSAPI支付测试</body>
   <mch_id>10000100</mch_id>
   <nonce_str>1add1a30ac87aa2db72f57a2375d8fec</nonce_str>
   <notify_url>http://wxpay.weixin.qq.com/pub_v2/pay/notify.v2.php</notify_url>
   <openid>oUpF8uMuAJO_M2pxb1Q9zNjWeS6o</openid>
   <out_trade_no>1415659990</out_trade_no>
   <spbill_create_ip>14.23.150.211</spbill_create_ip>
   <total_fee>1</total_fee>
   <trade_type>JSAPI</trade_type>
   <sign>0CB01533B8C1EF103065174F50BCA001</sign>
</xml> 

返回来的requestData也是一段xml字符串:

 

<xml>
   <return_code><![CDATA[SUCCESS]]></return_code>
   <return_msg><![CDATA[OK]]></return_msg>
   <appid><![CDATA[wx2421b1c4370ec43b]]></appid>
   <mch_id><![CDATA[10000100]]></mch_id>
   <nonce_str><![CDATA[IITRi8Iabbblz1Jc]]></nonce_str>
   <sign><![CDATA[7921E432F65EB8ED0CE9755F0E86D72F]]></sign>
   <result_code><![CDATA[SUCCESS]]></result_code>
   <prepay_id><![CDATA[wx201411101639507cbf6ffd8b0779950874]]></prepay_id>
   <trade_type><![CDATA[JSAPI]]></trade_type>
</xml> 

 

调用此接口是为了获取prepay_id,接口返回来的结果包含了prepay_id,接下来把它取出,先要一个把xml字符串转换为SortedDictionary类型的函数:

        /// <summary>
        /// 把XML数据转换为SortedDictionary<string, string>集合
        /// </summary>
        /// <param name="strxml"></param>
        /// <returns></returns>
        public SortedDictionary<string, string> GetInfoFromXml(string xmlstring)
        {
            SortedDictionary<string, string> sParams = new SortedDictionary<string, string>();
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(xmlstring);
                XmlElement root = doc.DocumentElement;
                int len = root.ChildNodes.Count;
                for (int i = 0; i < len; i++)
                {
                    string name = root.ChildNodes[i].Name;
                    if (!sParams.ContainsKey(name))
                    {
                        sParams.Add(name.Trim(), root.ChildNodes[i].InnerText.Trim());
                    }
                }
            }
            catch (Exception ex)
            {
                //LxCommomHelper.Commom.TraceLog.LogWrite(ex.ToString(), LxCommomHelper.Commom.LogEnum.Pay);
            }
            return sParams;
        }

然后调用方法:

        SortedDictionary<string, string> requestXML = wxPayBaseHelper.GetInfoFromXml(requestData);
        foreach (KeyValuePair<string, string> k in requestXML)
        {
            if (k.Key == "prepay_id")
            {
                prepay_id = k.Value;
                break;
            }
        }

ok,又获取到了prepay_id,最后是发起微信支付了,待续。

 

posted on 2015-02-12 11:17  vinsonLu  阅读(6621)  评论(1编辑  收藏  举报