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Object Relational Mapping Tools for .NET

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With ObjectSpaces being delayed I still get many customers asking about where to get ORM tools for .NET. Well I sent this link to a customer yesterday as it has a wide variety of them listed.

https://sharptoolbox.com/Pages/Category74089b0a-1105-4389-b1db-eedf27e20cfb.aspx

However I just don’t think that part of the market is fully baked – several posts between Don [SOAP] Box and Ted Neward show that the debate rages on. We also have some pretty smart people thinking about areas of this at Microsoft.

What are they for: ORM tools help bridge the ‘impedance mismatch’ between relational data and objects. Objects tend to represent a de-normalized view of data where-as a relational system presents a normalized view. There are also a number of fundamental data level issues such as the existence of nullable types in databases and the non-existance of these [well largely at least] in the object world.

Quote of the day: … "object-relational mapping is the Vietnam of Computer Science", referring to exactly that particular problem: the amount of progress when compared to the amount of energy put in is a staggeringly bad ratio…

Comments

  • Anonymous
    February 24, 2005
    NHibernate is here today and it may be everything ObjectSpaces promises to be.

    It's based off of the proven Hibernate project that's been in the Java space for quite a while now.

    Having worked with NHibernate for a bit now, I have to say that I like it and I really can't see myself doing ADO.Net anymore unless truly necessary. It greatly simplifies the process of data access IMO.
  • Anonymous
    February 24, 2005
    The comment has been removed
  • Anonymous
    February 24, 2005
    It's probably wqorth giving our local boy "Alex James" a plug here...

    http://www.base4.net/
  • Anonymous
    March 02, 2005
    Base4.NET is very clear / easy solution.
    I seems to WinFS.