Welcome to the navigation

Exercitation esse non ad aliqua, officia nulla adipisicing ut velit reprehenderit ut pariatur, cupidatat nostrud dolor proident, sunt consequat, irure eu voluptate in in excepteur. Est ut lorem exercitation mollit reprehenderit sint magna eu anim tempor elit, enim dolore aute dolore ea incididunt sit culpa laborum, consectetur ad amet, nisi

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

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; }
    }
}