Why class object sent to POST is coming NULL?

post parameter is always null
odataactionparameters is always null
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post api returns null

I have this POST method in api controller.

public void Post(EngineeringData EngineeringData)
{
    EngineeringDataDAL EngDataDAL = new EngineeringDataDAL();

    EngDataDAL.InsertEngineeringData(EngineeringData);
}

I am sending it a test data using POSTMAN.

 EngineeringData = {
    'FunctionalLocation': 'Functional1',
    'WINFileNo': 'WinFileNo-01',
    'EqptType': 'EqptType-01',
    'ComponentTagNo': 'Componenttag-01'
}

but the method's parameter is null. Why?

EngineeringData.cs

public class EngineeringData
{
    public int EnggDataID { get; set; }
    public string FunctionalLocation { get; set; }
    public string WinFileNo { get; set; }
    public string EqptType { get; set; }
    public string ComponentTagNo { get; set; }
}

If you're including EngineeringData= in your request, that could be the reason. To the best of my knowledge, ASP.Net expects the body to be plain JSON, not form data.

web-api POST body object always null, public class EdiconLogFilter { public string fClientName; public string (No error messages will be sent in the response unless no null� When sending data to an endpoint, there is a difference between setting the Id to null and not setting an Id attribut at all. In my case, when i send data like this, an Image object will be created with those data, and will be saved in the database correctly with a new Id:

I have this POST method in api controller.

 public void Post(EngineeringData EngineeringData)

What you are probably missing is

 public void Post([FromBody] EngineeringData EngineeringData)

ASP.NET CORE Web API: Value are always null when doing HTTP , So here's my scenario: I'm trying to do a HTTP Post request to an api Here's the structure of Stock class public class Stock { [Key] public Guid that indicates its not getting the file while I am sending a image file with the same key "file". In my case, when i send data like this, an Image object will be� The Action method for POST operation accepts an object of the FormCollection class as parameter. Note : FormCollection class object is a Key-Value pair collection which provides access to data from the Request.Form collection.

{ 
    "FunctionalLocation": "Functional1",
    "WINFileNo": "WinFileNo-01",
    "EqptType": "EqptType-01",
    "ComponentTagNo": "Componenttag-01"
}

Try passing in this data. I believe it has to be valid JSON data to be passed to the controller to accept the parameters. Also not sure if the left parameter before the = sign is needed.

Restful service receives null JSON object when it is embedded , Send the JSON to the Grails Restful endpoint via POST method an argument an object of the class that has all the properties in the above JSON. payload for your rest endpoint of your application (I sent it through POST): By the way, I am using IntelliJ and the H2 database and tomcat that comes in the� NullPointerException is a situation in code where you try to access/ modify an object which has not been initialized yet. It essentially means that object reference variable is not pointing anywhere and refers to nothing or ‘null‘. A example java program which throws null pointer exception.

The received value is null when I try to Post to my Web Api, Debug("Reveived value: " + value); IDictionary<string, object> I finally succeded in sending a POST with fiddler - I needed to put Why is message null when message is message ASP.NET MVC 4 Model binding null on post. 27 Feb 2013 in The form represents a class, let’s pretend this is a

get_post() | Function, get_post( int|WP_Post|null $post = null, string $output = OBJECT, string $filter = ' raw' ). Retrieves post data given a post ID or post object. This section explains how each of these concepts is mapped to the data object concepts of null and unset. Null values JSON has a special value called null which can be set on any type of data including arrays, objects, number and boolean types.

Handling JSON null and empty arrays and objects, Handling null and empty arrays and objects used in JSON data is described. JSON has a special value called null which can be set on any type of data including arrays, Hence, no action is taken on the data object for those two properties. So if you send a POST request to the API, this endpoint will pick it up and its body content will be made available. But you will often find out that if the request is from a URL encoded simple string type, you will have a value of null show up here. That is the problem. 1

Comments
  • yes sir taht;s true
  • On problem is WinFileNo fields don't match. One is "WINFileNo" the other is "WinFileNo".