Welcome to the navigation

Tempor sunt anim duis veniam, fugiat ullamco ex officia ut laborum, in deserunt aliquip consequat, dolore laboris quis dolore proident, consectetur eiusmod et amet, sit. Dolore dolor ex ut non id aliquip adipisicing proident, elit, ut tempor consectetur consequat, sit cillum deserunt lorem officia exercitation laborum, mollit do sint in

Yeah, this will be replaced... But please enjoy the search!

Eric Herlitz
Optimizely (Episerver), Umbraco, .NET, Kubernetes and more
Take me home
About me
  1. 2012
  2. 12
  3. 31
  4. Mapping Dictionary to...

Mapping Dictionary to Typed object using c#

Categories Tags
There are some good frameworks that may help you mapping dictionaries and alike to typed objects but in some cases you simply want something simpler or custom for that matter. The most important thing here is to transfer our dictionary to a typed object.

Example dictionary

Dictionary<string, string> dictionary = new Dictionary<string, string>();
dictionary.Add("Id", "1");
dictionary.Add("Name", "Trikks");
dictionary.Add("EMail", "info@example.com");

Example class

public class ExampleClass
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string EMail { get; set; }
}

Method

private static T DictionaryToObject<T>(IDictionary<string, string> dict) where T : new()
{
    var t = new T();
    PropertyInfo[] properties = t.GetType().GetProperties();
 
    foreach (PropertyInfo property in properties)
    {
        if (!dict.Any(x => x.Key.Equals(property.Name, StringComparison.InvariantCultureIgnoreCase)))
            continue;
 
        KeyValuePair<string, string> item = dict.First(x => x.Key.Equals(property.Name, StringComparison.InvariantCultureIgnoreCase));
 
        // Find which property type (int, string, double? etc) the CURRENT property is...
        Type tPropertyType = t.GetType().GetProperty(property.Name).PropertyType;
 
        // Fix nullables...
        Type newT = Nullable.GetUnderlyingType(tPropertyType) ?? tPropertyType;
 
        // ...and change the type
        object newA = Convert.ChangeType(item.Value, newT);
        t.GetType().GetProperty(property.Name).SetValue(t, newA, null);
    }
    return t;
}

Full example

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
 
namespace ConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, string> dictionary = new Dictionary<string, string>();
            dictionary.Add("Id", "1");
            dictionary.Add("Name", "Trikks");
            dictionary.Add("EMail", "info@example.com");
 
            ExampleClass example = DictionaryToObject<ExampleClass>(dictionary);
        }
 
        private static T DictionaryToObject<T>(IDictionary<string, string> dict) where T : new()
        {
            var t = new T();
            PropertyInfo[] properties = t.GetType().GetProperties();
 
            foreach (PropertyInfo property in properties)
            {
                if (!dict.Any(x => x.Key.Equals(property.Name, StringComparison.InvariantCultureIgnoreCase)))
                    continue;
 
                KeyValuePair<string, string> item = dict.First(x => x.Key.Equals(property.Name, StringComparison.InvariantCultureIgnoreCase));
 
                // Find which property type (int, string, double? etc) the CURRENT property is...
                Type tPropertyType = t.GetType().GetProperty(property.Name).PropertyType;
 
                // Fix nullables...
                Type newT = Nullable.GetUnderlyingType(tPropertyType) ?? tPropertyType;
 
                // ...and change the type
                object newA = Convert.ChangeType(item.Value, newT);
                t.GetType().GetProperty(property.Name).SetValue(t, newA, null);
            }
            return t;
        }
    }
 
    public class ExampleClass
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string EMail { get; set; }
    }
}