mikezhuyuan / EQuery

Simple ORM for .NET

EQuery

A very simple ORM(query only) for .NET and SQL SERVER 2008.

Features

• Code first style mapping
• Much faster than Entity Framwork
• Compiled query
• Built-in profile

Example

public class Assignment
{
	public int ID { get; set; }
	public string Title { get; set; }        
	public Assignment Parent { get; set; }
	public string Description { get; set; }
	public DateTime UpdateDate { get; set; }

	public IEnumerable<Assignment> Children { get; set; }

	public override string ToString()
	{
		return string.Format("{0}, {1}, {2}, {3}", ID, Title, Description, UpdateDate);
	}
}

class ELabFactory : QueryFactory
{
	protected override void OnMapping(IMappingBuilder builder)
	{
		builder.Entity<Assignment>() 
			   .Key(_=>_.ID, "Assignment_id")
			   .Reference(_=>_.Parent, "ParentAssignment_id")
			   ;
	}
}

class Program
{
	static void Main(string[] args)
	{
		var connStr = @"Data Source=.;Initial Catalog=YOUR_DATABASE;Integrated Security=True";

		var factory = new ELabFactory(); //this should be cached

		var query = factory.CreateQuery(connStr);
		
		var a = query.Get<Assignment>(3);
		var p = query.LoadReference(a, _ => _.Parent);
		
		//cache itms
		var itms =
		   factory.CreateQuery(connStr).All<Assignment>()
				.Where(_ => _.Parent.Parent.ID == 1 && _.Title.Contains("english"))                    
					.Take(10)
				.Skip(10)
				.ToList()
				;
		
		foreach(var itm in itms)
			Console.WriteLine(itm);
			
		Console.WriteLine(Profiler.Statistics());
		Console.ReadKey();
	}
}