修复ffm报文解析航班航段目的站适配"/5X"被识别成目的站的BUG

@@ -1359,10 +1359,21 @@ namespace CustomsCargoSystem.ExchangeDataStorageService
                                 for (int num2 = i - 1; num2 > 0; num2--)
                                 {
                                     string text8 = list[num2].Trim();
+                                    //change by mrz
+                                    //航班多航段目的站判断修复
                                     if (!string.IsNullOrEmpty(text8) && text8.Length >= 3 && text8.Length <= 40 && (text8.Length == 3 || text8.Substring(0, 3) == "CGO"))
                                     {
-                                        destinationstation = text8.Substring(0, 3);
-                                        break;
+                                        //取前三个字符 判断是否是航站代码，排查掉/0X 这种字符的
+                                        string destinationstation_str = text8.Substring(0, 3);
+                                        string destnation_pattern = "^[A-Z]{3}$";
+                                        if (Regex.IsMatch(destinationstation_str, destnation_pattern))
+                                        {
+                                            //找到就跳出，没找到继续往上找
+                                            destinationstation = text8.Substring(0, 3);
+                                            break;
+                                        }
+                                        
+                                        
                                     }
                                 }
                                 int num3 = 0;