c# map dictionary to object properties code example

Example 1: c# dictionary values to array

// dict is Dictionary<string, Foo>

Foo[] foos = new Foo[dict.Count];
dict.Values.CopyTo(foos, 0);

// or in C# 3.0:
var foos = dict.Values.ToArray();

Example 2: mapping dictionary to object c#

using System.Collections.Generic;
using System.Linq;
using System.Reflection;

namespace WebOpsApi.Shared.Helpers
{
    public static class MappingExtension
    {
        public static T ToObject<T>(this IDictionary<string, object> source)
            where T : class, new()
        {
            var someObject = new T();
            var someObjectType = someObject.GetType();

            foreach (var item in source)
            {
                var key = char.ToUpper(item.Key[0]) + item.Key.Substring(1);
                var targetProperty = someObjectType.GetProperty(key);


                if (targetProperty.PropertyType == typeof (string))
                {
                    targetProperty.SetValue(someObject, item.Value);
                }
                else
                {

                    var parseMethod = targetProperty.PropertyType.GetMethod("TryParse",
                        BindingFlags.Public | BindingFlags.Static, null,
                        new[] {typeof (string), targetProperty.PropertyType.MakeByRefType()}, null);

                    if (parseMethod != null)
                    {
                        var parameters = new[] { item.Value, null };
                        var success = (bool)parseMethod.Invoke(null, parameters);
                        if (success)
                        {
                            targetProperty.SetValue(someObject, parameters[1]);
                        }

                    }
                }
            }

            return someObject;
        }

        public static IDictionary<string, object> AsDictionary(this object source, BindingFlags bindingAttr = BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance)
        {
            return source.GetType().GetProperties(bindingAttr).ToDictionary
            (
                propInfo => propInfo.Name,
                propInfo => propInfo.GetValue(source, null)
            );
        }
    }
}

Example 3: c# map dictionary to object properties

class ObjectToMapTo
        {
            public int ID;
            public string Name;
            public bool IsAdmin;

            public override string ToString()
            {
                return $"(ID={ID} Name={Name} IsAdmin={IsAdmin})";
            }

        }


        static object MapDictToObj(Dictionary<string, object> dict, Type destObject)
        {

            object returnobj = Activator.CreateInstance(destObject);

            foreach (string key in dict.Keys)
            {
                object value = dict[key];

                FieldInfo field = destObject.GetField(key);
                if (field != null)
                {
                    field.SetValue(returnobj, value);
                }


            }

            return returnobj;
        }



        static void Main(string[] args)
        {
            Dictionary<string, object> dict = new Dictionary<string, object>();
            dict["ID"] = 1000;
            dict["Name"] = "This is a name";
            dict["IsAdmin"] = true;

            ObjectToMapTo obj = (ObjectToMapTo)MapDictToObj(dict, typeof(ObjectToMapTo));

            Console.WriteLine(obj);

            Console.ReadKey();
            //Returns: (ID=1000 Name=This is a name IsAdmin=True)

        }