……不得不再次給關注dlinq的朋友道歉了。好久都沒有更新blog了。因為工作的變動，還要趕期限，沒有時間關注這裡了。
先發布一則消息。Orcas Beta1， 這個才是beta1，可以到http://www.microsoft.com/downloads/details.aspx?FamilyID=f10fb5df-e369-4db4-b9a7-845dbf793368&DisplayLang=en 下載。5月1號的版本。最早4月19號就出來過一個，只是沒有在意。還有一個http://www.microsoft.com/downloads/details.ASPx?FamilyID=36b6609e-6f3d-40f4-8c7d-ad111679d8dc&DisplayLang=en 。 一個是self-extracting 版本的，一個是Virtual PC version的。不知道什麼區別。沒有裝過。
本節捨去原來的計劃，而改講映射工具。在入門三一文中，我們提到了sqlmetal這個工具。http://www.cnblogs.com/126/archive/2006/09/06/492332.Html sqlmetal的功能是將數據庫的信息抽提出來，生成映射代碼。Orcas還有另外一個工具，就是O/R Designer.
先講sqlmetal. 自上次的版本後，sqlmetal，又增加了一些新的功能。比如，支持SQLCE版本的SQL Server, 支持直接輸入connection string， 等等。 這是sqlmetal的幫助信息，是不是比上次多了很多？
Microsoft (R) Database Mapping Generator 2008 Beta 2 version 1.00.20612
for Microsoft (R) .Net Framework version 3.5
Copyright (C) Microsoft Corporation. All rights reserved.
SqlMetal [options] [<input file>]
Generates code and mapping for the LINQ to SQL component of the .Net framework. SqlMetal can:
- Generate source code and mapping attributes or a mapping file from a database.
- Generate an intermediate dbml file for customization from the database.
- Generate code and mapping attributes or mapping file from a dbml file.
Options:
/server:<name> Database server name.
/database:<name> Database catalog on server.
/user:<name> Login user ID (default: use Windows Authentication).
/password:<password> Login passWord (default: use Windows Authentication).
/conn:<connection string> Database connection string. Cannot be used with /server, /database, /us
er or /passWord options.
/timeout:<seconds> Timeout value to use when SqlMetal Accesses the database (default: 0 wh
ich means infinite).
/views Extract database vIEws.
/functions Extract database functions.
/sprocs Extract stored procedures.
/dbml[:file] Output as dbml. Cannot be used with /map option.
/code[:file] Output as source code. Cannot be used with /dbml option.
/map[:file] Generate mapping file, not attributes. Cannot be used with /dbml option
.
/language:<language> Language for source code: VB or C# (default: derived from extension on code file name).
/namespace:<name> Namespace of generated code (default: no namespace).
/context:<type> Name of data context class (default: derived from database name).
/entitybase:<type> Base class of entity classes in the generated code (default: entitIEs have no base class).
/pluralize Automatically pluralize or singularize class and member names using English language rules.
/serialization:<option> Generate serializable classes: None or Unidirectional (default: None).
/provider:<type> Provider type (default: provider is determined at run time).
<input file> May be a SqlExpress mdf file, a SqlCE sdf file, or a dbml intermediate file.
Create code from SqlServer:
SqlMetal /server:myserver /database:northwind /code:nwind.cs /namespace:nwind
Generate intermediate dbml file from SqlServer:
SqlMetal /server:myserver /database:northwind /dbml:northwind.dbml /namespace:nwind
Generate code with external mapping from dbml:
SqlMetal /code:nwind.cs /map:nwind.map northwind.dbml
Generate dbml from a SqlCE sdf file:
SqlMetal /dbml:northwind.dbml northwind.sdf
Generate dbml from SqlExpress local server:
SqlMetal /server:.\sqlexpress /database:northwind /dbml:northwind.dbml
Generate dbml by using a connection string in the command line:
SqlMetal /conn:"server='myserver'; database='northwind'" /dbml:northwind.dbml
