IDataReader - ToExpandoObject

An IDataReader extension method that converts the @this to an expando object.

Try it

public static void Main()
{
	string sql = "SELECT 1 AS IntColumn, 'FizzBuzz' AS StringColumn";
	
	using (var conn = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))
    {
        conn.Open();
        using (DbCommand command = conn.CreateCommand())
        {
            command.CommandText = sql;
            using (IDataReader reader = command.ExecuteReader())
            {
				reader.Read();
				
				//C# Extension Method: IDataReader - ToExpandoObject
                dynamic entity = reader.ToExpandoObject();
				
				Console.WriteLine(entity.IntColumn);
			    Console.WriteLine(entity.StringColumn);
            }
        }
    }
}

View Source
using System.Collections.Generic;
using System.Data;
using System.Dynamic;
using System.Linq;

public static partial class Extensions
{
    /// <summary>
    ///     An IDataReader extension method that converts the @this to an expando object.
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <returns>@this as a dynamic.</returns>
    public static dynamic ToExpandoObject(this IDataReader @this)
    {
        Dictionary<int, KeyValuePair<int, string>> columnNames = Enumerable.Range(0, @this.FieldCount)
            .Select(x => new KeyValuePair<int, string>(x, @this.GetName(x)))
            .ToDictionary(pair => pair.Key);

        dynamic entity = new ExpandoObject();
        var expandoDict = (IDictionary<string, object>) entity;

        Enumerable.Range(0, @this.FieldCount)
            .ToList()
            .ForEach(x => expandoDict.Add(columnNames[x].Value, @this[x]));

        return entity;
    }
}