/// <summary>
/// 微信退支付接口
/// </summary>
/// <param name="request">请求参数</param>
/// <param name="config">config</param>
/// <returns>xml</returns>
public static string GetRefundPayRequestXml(RefundPayRequest request, Config config)
{
SortedDictionary <string, string> sParams = new SortedDictionary <string, string>
{
{ "appid", config.GetAppId() },
{ "mch_id", config.GetPid() },
{ "nonce_str", Config.GetNoncestr() },
{ "total_fee", request.TotalFee.ToString() },
{ "refund_fee", request.RefundFee.ToString() },
{ "out_refund_no", request.OutRefundNo }
};
if (!string.IsNullOrWhiteSpace(request.OutTradeNo))
{
sParams.Add("out_trade_no", request.OutTradeNo);
}
else
{
sParams.Add("transaction_id", request.TransactionId);
}
if (!string.IsNullOrWhiteSpace(request.RefundDesc))
{
sParams.Add("refund_desc", request.RefundDesc);
}
var sing = Signature.Getsign(sParams, config.GetKey());
sParams.Add("sign", sing);
//拼接成XML请求数据
StringBuilder sbPay = new StringBuilder();
foreach (KeyValuePair <string, string> k in sParams)
{
if (k.Key == "attach" || k.Key == "body" || k.Key == "sign")
{
sbPay.Append("<" + k.Key + "><![CDATA[" + k.Value + "]]></" + k.Key + ">");
}
else
{
sbPay.Append("<" + k.Key + ">" + k.Value + "</" + k.Key + ">");
}
}
var return_string = $"<xml>{sbPay}</xml>";
return(return_string);
}
/// <summary>
/// 退款信息
/// </summary>
/// <param name="request">退款参数</param>
/// <param name="config">配置</param>
/// <returns>退款结果</returns>
public static RefundPayResult RefundPay(RefundPayRequest request, Config config)
{
var result = new RefundPayResult();
var orderqueryResult = OrderQuery(new OrderQueryRequest
{
OutTradeNo = request.OutTradeNo,
TransactionId = request.TransactionId
}, config);
if (orderqueryResult.TradeState == "SUCCESS" || orderqueryResult.TradeState == "REFUND")
{
if (request.RefundFee > orderqueryResult.TotalFee)
{
result.IsSuccess = false;
result.Message = "退款金额大于总订单金额";
return(result);
}
else
{
// 转入退款的订单先去查询退款金额够不够
if (orderqueryResult.TradeState == "REFUND")
{
var refundQueryResult = RefundPayQuery(new RefundQueryRequest
{
OutTradeNo = request.OutTradeNo
}, config);
if (refundQueryResult.IsSuccess)
{
// 已退款金额
var oldRefundAmount = refundQueryResult.Details.Sum(item => item.RefundFee);
if (request.RefundFee > orderqueryResult.TotalFee - oldRefundAmount)
{
result.IsSuccess = false;
result.Message = "退款金额大于总订单金额";
return(result);
}
var refundOrder = refundQueryResult.Details.FirstOrDefault(item => item.OutRefundNo == request.OutRefundNo);
if (refundOrder != null)
{
if (refundOrder.RefundStatus == "SUCCESS" || refundOrder.RefundStatus == "PROCESSING")
{
result.IsSuccess = true;
result.TransactionId = orderqueryResult.TransactionId;
result.OutTradeNo = request.OutTradeNo;
result.OutRefundNo = request.OutRefundNo;
result.RefundId = refundOrder.RefundId;
result.RefundFee = refundOrder.RefundFee;
return(result);
}
}
}
else
{
result.Message = "退款查询失败";
result.IsSuccess = false;
return(result);
}
}
request.TotalFee = orderqueryResult.TotalFee;
var requestStr = TenpayUtil.GetRefundPayRequestXml(request, config);
var response = HttpHelp.PostXmlToUrl(Config.RefundPayUrl, requestStr, config.GetRefundCert(), config.GetPid());
result = TenpayUtil.ConvertToRefundPayResult(response);
}
}
else
{
result.IsSuccess = false;
result.Message = orderqueryResult.Message;
}
return(result);
}
