cannot implicitly convert type system.collections.Generic.Ienumerable RSS

• • Reply
  polachan

  Member

  410 Points

  1326 Posts

  cannot implicitly convert type system.collections.Generic.Ienumerable

  Jul 15, 2020 06:12 AM|polachan|LINK

  I am trying to parse json string calling from API call . The json string has group part. I am getting the Json data as given below

  public class Weather
      {
          
          public string  id { get; set; }
          public string weather_state_name { get; set; }
          public string weather_state_abbr { get; set; }
          public string wind_direction_compass { get; set; }
          public string created { get; set; }
          public string applicable_date { get; set; }
          public string min_temp { get; set; }
          public string max_temp { get; set; }
          public string the_temp { get; set; }
          public string wind_speed { get; set; }
          public string wind_direction { get; set; }
          public string air_pressure { get; set; }
          public string Humidity { get; set; }
          public string  Visibllity { get; set; }
          public string Predictability { get; set; }   
         
  
      }
  
  
  {
      "consolidated_weather": [
          {
              "id": 4577625064341504,
              "weather_state_name": "Heavy Rain",
              "weather_state_abbr": "hr",
              "wind_direction_compass": "WSW",
              "created": "2020-07-14T19:35:14.577740Z",
              "applicable_date": "2020-07-14",
              "min_temp": 11.11,
              "max_temp": 15.05,
              "the_temp": 14.32,
              "wind_speed": 6.570953330777592,
              "wind_direction": 254.13274105640758,
              "air_pressure": 1016.5,
              "humidity": 85,
              "visibility": 7.654361031575599,
              "predictability": 77
          },
          {
              "id": 4896540210495488,
              "weather_state_name": "Showers",
              "weather_state_abbr": "s",
              "wind_direction_compass": "WNW",
              "created": "2020-07-14T19:35:17.569534Z",
              "applicable_date": "2020-07-15",
              "min_temp": 12.31,
              "max_temp": 17.03,
              "the_temp": 16.509999999999998,
              "wind_speed": 7.600821124862802,
              "wind_direction": 284.49357944800784,
              "air_pressure": 1015.5,
              "humidity": 82,
              "visibility": 13.558008729022509,
              "predictability": 73
          },
  ]
  "title": "Texas",
      "location_type": "City", 
      "timezone": "US"

  My Models

  public class WeatherList
      {
          public IEnumerable<Weather> consolidated_weather { get; set; }
      }
  }
  
  public class Weather
      {
          
          public string  id { get; set; }
          public string weather_state_name { get; set; }
          public string weather_state_abbr { get; set; }
          public string wind_direction_compass { get; set; }
          public string created { get; set; }
          public string applicable_date { get; set; }
          public string min_temp { get; set; }
          public string max_temp { get; set; }
          public string the_temp { get; set; }
          public string wind_speed { get; set; }
          public string wind_direction { get; set; }
          public string air_pressure { get; set; }
          public string Humidity { get; set; }
          public string  Visibllity { get; set; }
          public string Predictability { get; set; }   
         
  
      }
  

  Then I am trying to add the necessary data needed to show in  IEnumerable<Weather> to list but the error is coming cannot implicitly convert type system.collections.Generic.Ienumerable 

   public async Task<IEnumerable<Weather>> GetWeatherAsync(string woied)
          {
  
              var url = SD.APIBaseUrl + woied;
              var request = new HttpRequestMessage(HttpMethod.Get, url);
              var client = _clientFactory.CreateClient();
              HttpResponseMessage response = await client.SendAsync(request);
             
              IEnumerable<Weather> weather = new List<Weather>();
              WeatherList weatherList = new WeatherList();
              
              if (response.StatusCode == System.Net.HttpStatusCode.OK)
              {
                  var jsonString = await response.Content.ReadAsStringAsync();
                 
                  weatherList = JsonConvert.DeserializeObject<WeatherList>(jsonString);
                  return weatherList;
              }
              return null;
          }

  I am trying to store the following data only from the API jsonstring please help

  "id": 4577625064341504,
              "weather_state_name": "Heavy Rain",
              "weather_state_abbr": "hr",
              "wind_direction_compass": "WSW",
              "created": "2020-07-14T19:35:14.577740Z",
              "applicable_date": "2020-07-14",
              "min_temp": 11.11,
              "max_temp": 15.05,
              "the_temp": 14.32,
              "wind_speed": 6.570953330777592,
              "wind_direction": 254.13274105640758,
              "air_pressure": 1016.5,
              "humidity": 85,
              "visibility": 7.654361031575599,
              "predictability": 77

• • Reply
  Groningen

  None

  0 Points

  1 Post

  Re: cannot implicitly convert type system.collections.Generic.Ienumerable

  Jul 15, 2020 07:13 AM|Groningen|LINK

  There is nothing wrong with your code, but the end of json is strange.
  I think if you change last bit to and closing the json with "}" then it will work

  "title": "Texas",
      "location_type": "City", 
      "timezone": "US"

• • Reply
  bruce (sqlwo...

  All-Star

  58124 Points

  15640 Posts

  Re: cannot implicitly convert type system.collections.Generic.Ienumerable

  Jul 15, 2020 03:23 PM|bruce (sqlwork.com)|LINK

  IEnumable<Weather> is an interface, and JsonConvert can not create one. you need to supply a custom constructor (see newtonsoft docs) or change model to use concrete class:

  public class WeatherList
      {
          public List<Weather> consolidated_weather { get; set; }
      }
  }
  

  bruce (sqlwork.com)
• • Reply
  Evern

  Member

  80 Points

  32 Posts

  Re: cannot implicitly convert type system.collections.Generic.Ienumerable

  Jul 16, 2020 05:03 AM|Evern|LINK

  Hi,

  polachan

  public async Task<IEnumerable<Weather>> GetWeatherAsync(string woied)
          {
  
              var url = SD.APIBaseUrl + woied;
              var request = new HttpRequestMessage(HttpMethod.Get, url);
              var client = _clientFactory.CreateClient();
              HttpResponseMessage response = await client.SendAsync(request);
             
              IEnumerable<Weather> weather = new List<Weather>();
              WeatherList weatherList = new WeatherList();
              
              if (response.StatusCode == System.Net.HttpStatusCode.OK)
              {
                  var jsonString = await response.Content.ReadAsStringAsync();
                 
                  weatherList = JsonConvert.DeserializeObject<WeatherList>(jsonString);
                  return weatherList;
              }
              return null;
          }

  From the obtained json format, the serialization has become a dictionary, and the deserialization will get the object WeatherList, but the return type of this function is IEnumerable<Weather>.

  Regards,

  Evern