blocks|key|1435632|text|NHibernate|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1435633|Linq+(to+sql)？|1435634|Subsonic|1435635|难道Castle+Project不做点什么吗？|1435636|entityMap|0|LINK|mutability|MUTABLE|url|https://www.hibernate.org/|1|http://msdn.microsoft.com/en-us/library/bb425822.aspx|2|http://subsonicproject.com/|3|http://www.castleproject.org/ActiveRecord/^0|0|A|0|0|0|4|1|0|0|8|2|0|2|E|3|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|F|3|G|5|6|7|15|8|@]|9|@$A|16|B|17|1|18]]|C|$]]|$1|H|3|I|5|6|7|19|8|@]|9|@$A|1A|B|1B|1|1C]]|C|$]]|$1|J|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|K|$L|$5|M|N|O|C|$P|Q]]|R|$5|M|N|O|C|$P|S]]|T|$5|M|N|O|C|$P|U]]|V|$5|M|N|O|C|$P|W]]]]

<a href="https://www.hibernate.org/" rel="nofollow noreferrer">NHibernate</a>? 
<a href="http://msdn.microsoft.com/en-us/library/bb425822.aspx" rel="nofollow noreferrer">Linq</a> (to sql)? 
<a href="http://subsonicproject.com/" rel="nofollow noreferrer">Subsonic</a>? 
doesn't <a href="http://www.castleproject.org/ActiveRecord/" rel="nofollow noreferrer">Castle Project</a> do something?

blocks|key|31183|text|NHibernate是一种常见的、免费的、开源的选择。Subsonic是另一种选择，虽然可能不太灵活，但更容易使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|31184|有许多非开源选项，它们的功能非常丰富。一些值得研究的内容包括：|31185|31186|Entity+Framework+(免费-包含在rich)|unordered-list-item|31187|eXpress+Persistant+Objects+framework)|31188|LightSpeed中(商用，但价格低廉，非常易于使用，并采用.NET+(商用-非常成熟)|31189|31190|entityMap|0|LINK|mutability|MUTABLE|url|https://www.hibernate.org/343.html|1|http://www.subsonicproject.com/|2|http://www.google.com/url?sa=t&source=web&ct=res&cd=1&url=http://msdn.microsoft.com/en-us/library/aa697427(VS.80).aspx&ei=BKGhSqWBCIbYsQOZpJWNDw&usg=AFQjCNFKH-xjGU-u7uDyGs30J-eSPViDjw&sig2=xP49aXj-TkD1uukqZYKgjw|3|http://devexpress.com/Products/NET/ORM/|4|http://www.mindscape.co.nz/products/lightspeed/default.aspx^0|0|A|0|R|8|1|0|0|0|0|G|2|0|0|Q|3|0|0|A|4|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@$A|15|B|16|1|17]|$A|18|B|19|1|1A]]|C|$]]|$1|D|3|E|5|6|7|1B|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|1C|8|@]|9|@]|C|$]]|$1|G|3|H|5|I|7|1D|8|@]|9|@$A|1E|B|1F|1|1G]]|C|$]]|$1|J|3|K|5|I|7|1H|8|@]|9|@$A|1I|B|1J|1|1K]]|C|$]]|$1|L|3|M|5|I|7|1L|8|@]|9|@$A|1M|B|1N|1|1O]]|C|$]]|$1|N|3|-4|5|6|7|1P|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|1Q|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]|W|$5|R|S|T|C|$U|X]]|Y|$5|R|S|T|C|$U|Z]]|10|$5|R|S|T|C|$U|11]]|12|$5|R|S|T|C|$U|13]]]]

<a href="https://www.hibernate.org/343.html" rel="nofollow noreferrer">NHibernate</a> is a common, free, open source option. <a href="http://www.subsonicproject.com/" rel="nofollow noreferrer">Subsonic</a> is another option, which, though potentially less flexible, is much easier to use.

There are many non-open source options which are very feature rich. Some worth investigating include:

<ul>
<li><a href="http://www.google.com/url?sa=t&amp;source=web&amp;ct=res&amp;cd=1&amp;url=http%3A%2F%2Fmsdn.microsoft.com%2Fen-us%2Flibrary%2Faa697427(VS.80).aspx&amp;ei=BKGhSqWBCIbYsQOZpJWNDw&amp;usg=AFQjCNFKH-xjGU-u7uDyGs30J-eSPViDjw&amp;sig2=xP49aXj-TkD1uukqZYKgjw" rel="nofollow noreferrer">Entity Framework</a> (Free - included with .NET framework)</li>
<li><a href="http://www.mindscape.co.nz/products/lightspeed/default.aspx" rel="nofollow noreferrer">LightSpeed</a> (Commericial, but inexpensive, and very easy to use and feature rich)</li>
<li><a href="http://devexpress.com/Products/NET/ORM/" rel="nofollow noreferrer">eXpress Persistant Objects</a> (Commerical - very mature)</li>
</ul>

blocks|key|1583035|text|没有特定的顺序：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1583036|1583037|NHibernate+|unordered-list-item|1583038|Linq+2+Sql+|1583039|Subsonic|1583040|1583041|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|N|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|P|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|Q|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|L|$]]

In no particular order:

<ul>
<li>NHibernate </li>
<li>Linq 2 Sql </li>
<li>Subsonic</li>
</ul>

blocks|key|31230|text|查看，你会发现所有最知名的.Net+orm工具，以及它是否免费。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|31231|此外，如果你在SO上搜索ORM+Tag，你会发现很多关于同一问题的好问题和答案。|offset|length|31232|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/tagged/orm^0|0|C|7|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

Check <a href="http://amrelgarhy.com/blog/orm-tools-quot-net-quot/" rel="nofollow noreferrer">this ORM tools list</a> you will find there all the most known .Net orm tools, and if its free or not.

Also if you searched on SO for <a href="https://stackoverflow.com/questions/tagged/orm">ORM Tag</a> you will find a lot of good questions and answers talking about the same issue.

blocks|key|281323|text|ECO将是我的选择。在模型中最多释放12个类。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|281324|entityMap|0|LINK|mutability|MUTABLE|url|http://www.capableobjects.com/^0|0|3|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

<a href="http://www.capableobjects.com" rel="nofollow noreferrer">ECO</a> Would be my choice. Free up to 12 classes in the model.

blocks|key|1435691|text|.NET+3.5+SP1中的实体框架是免费的。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1435692|请注意，在.NET+4.0中有一个重大更新。你可以在这里找到更多信息：http://blogs.msdn.com/efdesign|1435693|entityMap|0|LINK|mutability|MUTABLE|url|http://www.microsoft.com/downloads/details.aspx?FamilyID=ab99342f-5d1a-413d-8319-81da479ab0d7&displaylang=en|1|http://blogs.msdn.com/efdesign/^0|0|C|0|0|Z|U|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

Entity Framework in <a href="http://www.microsoft.com/downloads/details.aspx?FamilyID=ab99342f-5d1a-413d-8319-81da479ab0d7&amp;displaylang=en" rel="nofollow noreferrer">.NET 3.5 SP1</a> is free.

Note that there are a major update on its way in .NET 4.0. You can find more information here : <a href="http://blogs.msdn.com/efdesign/" rel="nofollow noreferrer">http://blogs.msdn.com/efdesign</a>

blocks|key|1435743|text|NetTiers是一个非常有效的解决方案，允许通过CodeSmith生成代码。但是CodeSmith不是免费的。绝对值得一试它提供的一系列功能，从DAL甚至到ASP.Net数据绑定控件。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1435744|通常，我主要将其用于服务级别功能，并在项目开发期间轻松适应数据库更新。要有效地将其合并到解决方案中，以便能够在构建机器上使用MSBuild自动化，需要一些考虑。|1435745|ORM的另一个替代方案是Entity+Framework+(+Reed在上面提到过)，我目前使用它是因为它的Linq功能，以及它是Microsoft的事实(这在某些情况下可能是必需的)。|1435746|entityMap|0|LINK|mutability|MUTABLE|url|http://www.nettiers.com/^0|0|8|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

<a href="http://www.nettiers.com" rel="nofollow noreferrer">NetTiers</a> is a very effective solution allowing Code Generation via CodeSmith. But CodeSmith is not free. Definitely worth checking it out for the range of features it provides, from DAL even to ASP.Net data bound controls. 

Generally I have used it mostly for the Service Level features and easily accomodating database Updates during project development. It takes a bit of thought to incorporate it effectively into a solution to be able use MSBuild automation on a build machine.

Another alternative for ORM is Entity Framework (mentioned by Reed above) which I am currently using because of its Linq capabilities and the fact that it is Microsoft (which may be a requirement in some situations).

blocks|key|31370|text|我强烈推荐Linq+to+SQL。你可以像select+customer+from+customers+where+customer.LastName+==+"Doe"一样在你的数据库上使用原生LINQ查询。它使得使用数据库变得容易得多(然而我听说它不是“完整的”，但是它应该适用于大多数用途)。如果您使用此方法，请确保使用SQLMetal生成自定义DataContext。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|31371|entityMap^0|L|1R|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

I highly recommend Linq to SQL. you can use native LINQ queries on your database like <code>select customer from customers where customer.LastName == "Doe"</code>. It makes working with databases much easier (however i've heard that it's not "complete", however it should work for most uses). If you go this route, be sure to use SQLMetal for generating a Custom DataContext.

blocks|key|1435834|text|这个问题经常被问到。事实上，昨天：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1435835|NHibernate,+Entity+Framework,+active+records+or+linq2sql|offset|length|1435836|(我对这个问题的回答包含了这个问题被提出和回答的许多其他时间的链接。)|1435837|NHibernate是最首选的工具的名称。|1435838|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/1377236/nhibernate-entity-framework-active-records-or-linq2sql^0|0|0|1K|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

This question is asked a lot. Yesterday in fact:

<a href="https://stackoverflow.com/questions/1377236/nhibernate-entity-framework-active-records-or-linq2sql">NHibernate, Entity Framework, active records or linq2sql</a>

(My answer to that question contains links to many of the other times this question has been asked and answered.)

NHibernate is the name of the most preferred tool.

I am using <a href="http://www.alachisoft.com/tdev/" rel="nofollow noreferrer">Tier Developer</a> by alachisoft for OR Mapping .It is not effective as well as flexible.Please suggest me a mapping tool for dot net which is free/open source.It would be great if I get the nae of the most preffered tool.

OR Mapping tool

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在使用alachisoft的进行OR映射，.It并不有效，flexible.Please建议我一个用于.net的映射工具，它是免费的/开放的，如果我得到了最受欢迎的工具的nae，source.It将会很棒。

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