/// <summary>
/// 微信支付验证签名
/// </summary>
/// <param name="dic">接收到的所有参数</param>
/// <param name="key">商户 key</param>
/// <returns></returns>
public static bool VerifySign(SortedDictionary <string, string> dic, string key)
{
string sign = dic["sign"];
dic.Remove("sign");
if (MD5SignUtil.VerifySignature(FormatBizQueryParaMap(dic, false), sign, key))//验证签名
{
return(true);
}
return(false);
}
/// <summary>
/// 获取微信JSAPI支付对象
/// </summary>
/// <param name="orderId">订单号</param>
/// <param name="totalAmount">订单金额</param>
/// <param name="appId">微信公众号AppId</param>
/// <param name="mchId">微信商户号</param>
/// <param name="key">支付密钥</param>
/// <param name="openId">用户OpenId</param>
/// <param name="ip">用户的IP</param>
/// <param name="notifyUrl">通知地址</param>
/// <param name="body">订单内容</param>
/// <param name="tradeType">交易类型</param>
/// <returns></returns>
public static WXPayRequest GetBrandWcPayRequest(string orderId, decimal totalAmount, string appId, string mchId, string key, string openId, string ip, string notifyUrl, out bool isSuccess, string body = "", string tradeType = "")
{
isSuccess = false;
string backStr = "";
try
{
string nonStr = CommonUtil.CreateNoncestr();//随机串
#region 获取微信支付预支付ID
//第一次签名
SortedDictionary <string, string> dicStep1 = new SortedDictionary <string, string>();
dicStep1.Add("appid", appId);
dicStep1.Add("body", !string.IsNullOrEmpty(body) ? body : string.Format("订单号:{0}", orderId));
dicStep1.Add("mch_id", mchId);
dicStep1.Add("nonce_str", nonStr);
dicStep1.Add("out_trade_no", orderId);
dicStep1.Add("openid", openId);
dicStep1.Add("spbill_create_ip", ip);
dicStep1.Add("total_fee", (totalAmount * 100).ToString("F0"));
dicStep1.Add("notify_url", notifyUrl);
if (!string.IsNullOrEmpty(tradeType))
{
dicStep1.Add("trade_type", tradeType);
}
else
{
dicStep1.Add("trade_type", "JSAPI");
}
string strTemp1 = CommonUtil.FormatBizQueryParaMap(dicStep1, false);
string sign = MD5SignUtil.Sign(strTemp1, key);
//dicStep1 = (from entry in dicStep1
// orderby entry.Key ascending
// select entry).ToDictionary(pair => pair.Key, pair => pair.Value);
dicStep1.Add("sign", sign);
string postData = CommonUtil.ArrayToXml(dicStep1);
string url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
System.Net.HttpWebRequest req = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
byte[] requestBytes = System.Text.Encoding.UTF8.GetBytes(postData);
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = requestBytes.Length;
System.IO.Stream requestStream = req.GetRequestStream();
requestStream.Write(requestBytes, 0, requestBytes.Length);
requestStream.Close();
System.Net.HttpWebResponse res = (System.Net.HttpWebResponse)req.GetResponse();
System.IO.StreamReader sr = new System.IO.StreamReader(res.GetResponseStream(), System.Text.Encoding.UTF8);
backStr = sr.ReadToEnd();
sr.Close();
res.Close();
var result = System.Xml.Linq.XDocument.Parse(backStr);
var returnCode = result.Element("xml").Element("return_code").Value;
if (returnCode.ToUpper() == "FAIL")
{
return(null);
}
string preId = "";
var rusultCode = result.Element("xml").Element("result_code").Value;
if (returnCode.ToUpper().Equals("SUCCESS") && (rusultCode.ToUpper().Equals("SUCCESS")))
{
preId = result.Element("xml").Element("prepay_id").Value;
}
#endregion
#region 生成微信支付请求
WXPayRequest wxPayReq = new WXPayRequest();
string timesStamp = ((DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000).ToString();
wxPayReq.appId = appId;
wxPayReq.nonceStr = nonStr;
wxPayReq.package = "prepay_id=" + preId;
wxPayReq.signType = "MD5";
wxPayReq.timeStamp = timesStamp;
//第二次签名
SortedDictionary <string, string> dicStep2 = new SortedDictionary <string, string>();
dicStep2.Add("appId", wxPayReq.appId);
dicStep2.Add("timeStamp", wxPayReq.timeStamp);
dicStep2.Add("nonceStr", wxPayReq.nonceStr);
dicStep2.Add("package", wxPayReq.package);
dicStep2.Add("signType", "MD5");
string strTemp2 = CommonUtil.FormatQueryParaMap(dicStep2);
string paySign = MD5SignUtil.Sign(strTemp2, key);
wxPayReq.paySign = paySign;
isSuccess = true;
return(wxPayReq);
#endregion
}
catch (Exception ex)
{
using (System.IO.StreamWriter sw = new System.IO.StreamWriter(@"E:\WXPay\Error.txt", true, Encoding.GetEncoding("UTF-8")))
{
sw.WriteLine(backStr);
}
//return System.Xml.Linq.XDocument.Parse(backStr).Element("xml").Element("return_msg").Value;
return(null);
}
}
