.net core 微信支付-----订单关闭

首先看一下官方说明：

官方给了两个参数，但是请求示例却只给了商户号，这个我也没搞懂，但是看上面的url让传入的是订单号。我估计它的意思是也要把商户号加上，因为请求参数中给了两个参数，我们在请求的时候确实加入的商户号和订单号。

订单关闭信息的Model：

public class CloseOrder
    {
        /// <summary>
        /// 错误的编码
        /// </summary>
        public string code { set; get; }
 
        /// <summary>
        /// 具体的错误信息和原因
        /// </summary>
        public string message { set; get; }
 
        /// <summary>
        /// http状态码
        /// NoContent  关闭成功
        /// BadRequest 关闭失败
        /// </summary>
        public string StatusCode { set; get; }
 
        /// <summary>
        /// 订单是否关闭成功
        /// </summary>
        public bool Success => StatusCode == "NoContent" && string.IsNullOrEmpty(code);
    }

　　订单关闭接口：

/// <summary>
       /// 订单关闭
       /// </summary>
       /// <param name="OrderSno">订单号</param>
       /// <returns></returns>
       [HttpPost("Close")]
       public async Task<CloseOrder> Close(string OrderSno)
       {
           var url = $"https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/"+OrderSno+"/close";
           var client = new HttpClient(new HttpHandler());
           var bodyJson = new StringContent(new { mchid = WeChatConfig.mchid }.ToJson(), Encoding.UTF8, "application/json");
           var resp = await client.PostAsync(url, bodyJson);
           var respStr = await resp.Content.ReadAsStringAsync();
           var closeModel = new CloseOrder();
           if (!string.IsNullOrEmpty(respStr))
               closeModel = respStr.ToObject<CloseOrder>();
           return closeModel;
       }