Question41681154 reflection-property-setvalue

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Diagnostics;
using System.Globalization;
using System.Reflection;

    // https://stackoverflow.com/questions/41681154/reflection-property-setvalue

    public class Mapper<T>
    {
		readonly List<PropertyInfo> properties = typeof(T).GetProperties().OrderBy(p => p.Name).ToList();
		
        public T Map(string line, char delimitter)
        {
            if (String.IsNullOrEmpty(line))
                throw new ArgumentNullException("line");

            if (Char.IsWhiteSpace(delimitter))
                throw new ArgumentException("delimiter");

            var splitString = line.Split(delimitter);

            if (properties.Count() != splitString.Count())
                throw new InvalidOperationException(string.Format("Row has {0} columns but object has {1}", splitString.Count(), properties.Count()));

			// Create as a reference (boxed if a value type).
            object obj = Activator.CreateInstance(typeof(T));

			// Set the property values on the object reference.
            for (var i = 0; i < splitString.Count(); i++)
            {
                var prop = properties[i];
                var propType = prop.PropertyType;
                var valType = Convert.ChangeType(splitString[i], propType);
                prop.SetValue(obj, valType);
            }

			// Cast to the return type unboxing if required.
            return (T)obj;
        }
    }

    public struct TestStruct
    {
        public string A { get; set; }
        public string B { get; set; }
    }

    class TestClass
    {
        internal static void Test()
		{
			Test<TestStruct>("123,hello");
		}
		
        internal static void Test<T>(string testString)
        {
			Console.WriteLine("Testing mapping of \"{0}\" to {1}", testString, typeof(T));
            var mapper = new Mapper<T>();
            var test = mapper.Map(testString, ',');
			
            Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(test));
        }
    }

	public class Program
	{
		public static void Main()
		{
			TestClass.Test();
		}
	}