Pass Multiple Complex Objects to a Post/Put Web API Method

Is it possible to pass more than one complex type parameter separately in the web API 2 Controller post method?

As it was mentioned by DavidG you could create any complex types that will suit your specific needs so for example

public class TranInOutContainer 
{
    public List<TranInOutDtl> TranInOutDtl Dtl {get; set;}
    public List<TranInOutDtlsub> TranDtlSub DtlSub {get; set;} 
    ....
}

will be valid solution for your problem

You could also use dynamic type ofc but it should be used only if no other solution exists

How to receive multiple complex objects using HTTP POST method in Web App

1. You have "api/XYZ/" prefixed in your client code, but I don't see it on your server code. I predict that you have it in your server configuration but if not you will see issues.

2. You can only have one object with the [FromBody] tag in WebAPI, it's not clear how your trying to pass the MyClass object.

3. Only simple objects, ints and strings, can be passed in the uri string so the MyClass object will not be transferred correctly.

I would recommend removing the MyClass object or creating a larger object that encapsulates your List<SomeType> andMyClass` and pass that in the body of the request with the [FromBody] decoration.

Here's more information on the topic

Posting a complex object with ASP.NET WebAPI

You can use Newtonsoft.Json which will help you serialize your data to a json object. It can be used like this

using Newtonsoft.Json;

public static void SaveOrUpdateEntity(string url, object data)
{    
    var dataString = JsonConvert.SerializeObject(data);

    using (var client = new WebClient())
    {
        client.Headers.Add(HttpRequestHeader.ContentType, "application/json");
        response = client.UploadString(new Uri(url), "POST", dataString);
    }
}

To learn more about the newtonsoft library, read here

Passing multiple parameters to web API GET method

You can pass a custom model to an action method, but I suggest not using the GET for you task because GET does not have a body.

Instead, use the SEARCH verb and put the list of serials number and the date inside a custom model in the body.

public class MeterSearchModel 
{
   public List<string> Serials {get;set;}
   public DateTime Date {get;set;}  
}

In .NET Core 2 your controller would have something like -

[AcceptVerbs("SEARCH")]
public async Task<IActionResult> Search([FromBody] MeterSearchModel model)
{
    //..perform search 
}

Can the Post for a ODataContoller in WebAPI 2 take an IEnumerable of a complex object

Technically this is possible. If you get null as complexObjects in the following call

[HttpPost]
public IHttpActionResult CreateMany([FromBody] IEnumerable<ComplexObject> complexObjects)
{
  // ...
}

it's probably due to a format error in the bodies json object. If you have a working single object you can post, you just need to wrap it in brackets ... an array is an array even if it cotains only one element. This assumes, you check your web api actions via postman, fiddler etc., where you can 'compose' the entire request. Alternatively you can use the output of a 'GET all' action (if you have one) as input.

Regarding another aspect, the REST-fulness of list creation, you may find RESTful way to create multiple items in one request interesting

Hope this helps.

---

Related Topics