Json is generated in an ajax call from the view and then sent to the controller, unfortunately the code is not deserialising into an instance of a model and is giving me a null value The json -
{
"CheckSheetViewModel": {
"LstCheckSheetQuestion": {
"TblCheckSheetQuestion": [{
"CheckSheetQuestionId": "9",
"DateCreated": "04/11/2015 23:37:45",
"CreatedByUserId": "1",
"CheckSheetId": "2",
"QuestionType": "Traffic Lights",
"QuestionText": "Traffic lights and notes image upload test",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "",
"DisplayOrder": "0",
"CheckSheetGroupId": "",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}, {
"CheckSheetQuestionId": "10",
"DateCreated": "04/11/2015 23:38:21",
"CreatedByUserId": "1",
"CheckSheetId": "2",
"QuestionType": "Traffic Lights",
"QuestionText": "Traffic lights question",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "This is tip for this question",
"DisplayOrder": "1",
"CheckSheetGroupId": "",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}, {
"CheckSheetQuestionId": "406",
"DateCreated": "04/04/2016 09:55:30",
"CreatedByUserId": "1",
"CheckSheetId": "2",
"QuestionType": "Image Upload",
"QuestionText": "My test",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "",
"DisplayOrder": "3009",
"CheckSheetGroupId": "36",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}, {
"CheckSheetQuestionId": "407",
"DateCreated": "04/04/2016 10:18:34",
"CreatedByUserId": "1",
"CheckSheetId": "2",
"QuestionType": "Yes No",
"QuestionText": "This is question 3",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "",
"DisplayOrder": "2",
"CheckSheetGroupId": "",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}, {
"CheckSheetQuestionId": "440",
"DateCreated": "02/12/2016 17:57:04",
"CreatedByUserId": "2",
"CheckSheetId": "2",
"QuestionType": "Image Upload",
"QuestionText": "Another image question",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "",
"DisplayOrder": "1008",
"CheckSheetGroupId": "34",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}, {
"CheckSheetQuestionId": "5180",
"DateCreated": "23/08/2021 08:44:17",
"CreatedByUserId": "1",
"CheckSheetId": "2",
"QuestionType": "Traffic Lights",
"QuestionText": "test",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "",
"DisplayOrder": "3",
"CheckSheetGroupId": "",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}, {
"CheckSheetQuestionId": "5181",
"DateCreated": "23/08/2021 08:45:07",
"CreatedByUserId": "1",
"CheckSheetId": "2",
"QuestionType": "Yes No",
"QuestionText": "test 2",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "",
"DisplayOrder": "4",
"CheckSheetGroupId": "",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}, {
"CheckSheetQuestionId": "5182",
"DateCreated": "23/08/2021 08:46:04",
"CreatedByUserId": "1",
"CheckSheetId": "2",
"QuestionType": "Image Upload",
"QuestionText": "test question",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "",
"DisplayOrder": "5",
"CheckSheetGroupId": "",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}, {
"CheckSheetQuestionId": "5183",
"DateCreated": "23/08/2021 08:51:35",
"CreatedByUserId": "1",
"CheckSheetId": "2",
"QuestionType": "Traffic Lights",
"QuestionText": "question 10",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "",
"DisplayOrder": "6",
"CheckSheetGroupId": "",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}, {
"CheckSheetQuestionId": "5184",
"DateCreated": "23/08/2021 08:51:35",
"CreatedByUserId": "1",
"CheckSheetId": "2",
"QuestionType": "Serviceability",
"QuestionText": "question 11",
"AllowNotes": "",
"IncludeFollowUpDate": "",
"AllowSkip": "",
"AllowSupportingImages": "",
"QuestionTip": "",
"DisplayOrder": "7",
"CheckSheetGroupId": "",
"VehicleVisualsVideoId": "",
"VehicleVisualsVideoTitle": ""
}]
},
"LstCheckSheetQuestionGroup": {
"TblCheckSheetQuestionGroup": [{}, {
"CheckSheetGroupId": "34",
"DateCreated": "04/04/2016 09:55:05",
"Name": "Under The Bonnet",
"AnswerAsGroup": "true",
"DisplayOrder": "1"
}, {
"CheckSheetGroupId": "35",
"DateCreated": "04/04/2016 09:55:06",
"Name": "Tyre Report",
"AnswerAsGroup": "true",
"DisplayOrder": "3"
}, {
"CheckSheetGroupId": "36",
"DateCreated": "04/04/2016 10:18:04",
"Name": "Brake Report",
"AnswerAsGroup": "true",
"DisplayOrder": "4"
}, {
"CheckSheetGroupId": "37",
"DateCreated": "04/04/2016 10:18:04",
"Name": "Vehicle Raised",
"AnswerAsGroup": "true",
"DisplayOrder": "5"
}, {
"CheckSheetGroupId": "39",
"DateCreated": "04/04/2016 10:18:04",
"Name": "To Finish",
"AnswerAsGroup": "true",
"DisplayOrder": "7"
}, {
"CheckSheetGroupId": "42",
"DateCreated": "04/04/2016 10:18:34",
"Name": "Vehicle Lowered",
"AnswerAsGroup": "true",
"DisplayOrder": "6"
}]
},
"LstCheckSheet": {
"TblCheckSheet": [{
"CheckSheetId": "2",
"Description": "Amateur Service",
"DateCreated": "04/11/2015 23:37:45",
"CreatedByUserId": "1",
"Enabled": "true",
"StartMessage": "",
"EndMessage": "",
"AnswerInSequence": "False",
"AddToAllNewJobs": "True",
"MustBeSignedOff": "true"
}]
}
}
}
is being sent to this controller item -
[HttpPost]
public ActionResult checkSheetUpdate([FromBody] CheckSheetViewModel data)
{
//do stuff
}
using this model -
public partial class CheckSheetViewModel
{
[JsonProperty("LstCheckSheetQuestionGroup")]
[JsonPropertyName("LstCheckSheetQuestionGroup")]
public List<TblCheckSheetQuestionGroup> LstCheckSheetQuestionGroup { get; set; }
[JsonProperty("LstCheckSheetQuestion")]
[JsonPropertyName("LstCheckSheetQuestion")]
public List<TblCheckSheetQuestion> LstCheckSheetQuestion { get; set; }
[JsonProperty("LstCheckSheet")]
[JsonPropertyName("LstCheckSheet")]
public List<TblCheckSheet> LstCheckSheet { get; set; }
[JsonProperty("TblCheckSheet")]
[JsonPropertyName("TblCheckSheet")]
public TblCheckSheet TblCheckSheet { get; set; }
[JsonProperty("User")]
[JsonPropertyName("User")]
public TblUser User { get; set; }
[JsonProperty("Vidview")]
[JsonPropertyName("Vidview")]
public VideoViewModel Vidview { get; set; }
[JsonProperty("Animation")]
[JsonPropertyName("Animation")]
public Animation Animation { get; set; }
}
All the name and cases match and yet I still get a null on the input (data). Am I barking up the wrong tree or is there something obviously wrong? The model is made up of some lists of sub-models (not shown) for brevity.
CodePudding user response：
the root of your model needs to be fixed
Root myModel = JsonConvert.DeserializeObject<Root>(json);
public class Root
{
public CheckSheetViewModel CheckSheetViewModel { get; set; }
}
public class CheckSheetViewModel
{
public LstCheckSheetQuestion LstCheckSheetQuestion { get; set; }
public LstCheckSheetQuestionGroup LstCheckSheetQuestionGroup { get; set; }
public LstCheckSheet LstCheckSheet { get; set; }
}
public class LstCheckSheet
{
public List<TblCheckSheet> TblCheckSheet { get; set; }
}
public class LstCheckSheetQuestion
{
public List<TblCheckSheetQuestion> TblCheckSheetQuestion { get; set; }
}
public class LstCheckSheetQuestionGroup
{
public List<TblCheckSheetQuestionGroup> TblCheckSheetQuestionGroup { get; set; }
}
CodePudding user response：
Right, seems to be more to do with Multidimensional arrays and nullable Booleans (as I said legacy data), with a possible side order of data types
To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object.
I will reappraise my approach.