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Pass multiple complex objects to a post/put Web API method

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南旧
南旧 2020-11-29 21:51

Can some please help me to know how to pass multiple objects from a C# console app to Web API controller as shown below?

using (var httpClient = new System.N
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  • 南笙
    南笙 (楼主)
    2020-11-29 22:23

    Here's another pattern that may be useful to you. It's for a Get but the same principle and code applies for a Post/Put but in reverse. It essentially works on the principle of converting objects down to this ObjectWrapper class which persists the Type's name to the other side:

    using Newtonsoft.Json;
using System;
using System.Collections.Generic;

namespace WebAPI
{
    public class ObjectWrapper
    {
        #region Public Properties
        public string RecordJson { get; set; }
        public string TypeFullName { get; set; }
        #endregion

        #region Constructors

        public ObjectWrapper() : this(null, null)
        {
        }

        public ObjectWrapper(object objectForWrapping) : this(objectForWrapping, null)
        {
        }

        public ObjectWrapper(object objectForWrapping, string typeFullName)
        {
            if (typeFullName == null && objectForWrapping != null)
            {
                TypeFullName = objectForWrapping.GetType().FullName;
            }
            else
            {
                TypeFullName = typeFullName;
            }

            RecordJson = JsonConvert.SerializeObject(objectForWrapping);
        }
        #endregion

        #region Public Methods
        public object ToObject()
        {
            var type = Type.GetType(TypeFullName);
            return JsonConvert.DeserializeObject(RecordJson, type);
        }
        #endregion

        #region Public Static Methods
        public static List WrapObjects(List records)
        {
            var retVal = new List();
            records.ForEach
            (item =>
            {
                retVal.Add
                (
                    new ObjectWrapper(item)
                );
            }
            );

            return retVal;
        }

        public static List UnwrapObjects(IEnumerable objectWrappers)
        {
            var retVal = new List();

            foreach(var item in objectWrappers)
            {
                retVal.Add
                (
                    item.ToObject()
                );
            }

            return retVal;
        }
        #endregion
    }
}



    In the REST code:
    


    [HttpGet]
public IEnumerable Get()
{
    var records = new List();
    records.Add(new TestRecord1());
    records.Add(new TestRecord2());
    var wrappedObjects = ObjectWrapper.WrapObjects(records);
    return wrappedObjects;
}



    This is the code on the client side (UWP) using a REST client library. The client library just uses the Newtonsoft Json serialization library - nothing fancy.
    


    private static async Task> Getobjects()
{
    var result = await REST.Get>("http://localhost:50623/api/values");
    var wrappedObjects = (IEnumerable) result.Data;
    var unwrappedObjects =  ObjectWrapper.UnwrapObjects(wrappedObjects);
    return unwrappedObjects;
}

    
    
    
             
    
                                                        
    
            
            
    
              
                
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