ASP.NET MVC 3 (二)

Entity framework 

http://msdn.microsoft.com/en-us/library/bb399572.aspx

http://msdn.microsoft.com/en-us/library/bb399567.aspx

1. Applications can work in terms of a more application-centric conceptual model, including types with inheritance, complex members, and relationships.
2. Appliations are freed from hard-coded dependencies on a particular data engine or storage schema. 
3. Mappings between the conceptual model and the storage-specific schema can change without changing the application code.
4. Developers can work with a consistent application object model that can be mapped to various storage schemas, possibly implemented in different database management systems.
5. Multiple conceptual models can be mapped to a single storage schema.
6. Language-integrated query (LINQ) support provides compile-time syntax validation for queries against a conceptual model.

 

SqlClient for Entity FrameworkTypes

 http://msdn.microsoft.com/en-us/library/bb896344.aspx

Provider type name	Provider type attributes	EDMSimpleType name	Facets
bit	n/a	Edm.Boolean	n/a
tinyint	n/a	Edm.Byte	n/a
smallint	n/a	Edm.Int16	n/a
int	n/a	Edm.Int32	n/a
bigint	n/a	Edm.Int64	n/a
float	n/a	Edm.Double	n/a
real	n/a	Edm.Double	n/a
decimal	n/a	Edm.Decimal	Facet name Attribute name Value Precision MinimumMaximumDefaultConstant 13818False Scale MinimumMaximumDefaultConstant 0380False
numeric	n/a	Edm.Decimal	Facet name Attribute name Value Precision MinimumMaximumDefaultConstant 13818False Scale MinimumMaximumDefaultConstant 0380False
smallmoney	n/a	Edm.Decimal	Facet name Attribute name Value Precision DefaultConstant 10True Scale DefaultConstant 4True
money	n/a	Edm.Decimal	Facet name Attribute name Value Precision DefaultConstant 19True Scale DefaultConstant 4True
binary	n/a	Edm.Binary	Facet name Attribute name Value MaxLength MinimumMaximumDefaultConstant 180008000False FixedLength DefaultConstant TrueTrue
varbinary	n/a	Edm.Binary	Facet name Attribute name Value MaxLength MinimumMaximumDefaultConstant 180008000False FixedLength DefaultConstant FalseTrue
varbinary(max) Note: This type is not supported in SQL Server 2000.	n/a	Edm.Binary	Facet name Attribute name Value MaxLength DefaultConstant 214748364780True FixedLength DefaultConstant FalseTrue
image	n/a	Edm.Binary	Facet name Attribute name Value MaxLength DefaultConstant 2147483647True FixedLength DefaultConstant FalseTrue
timestamp	n/a	Edm.Binary	Facet name Attribute name Value MaxLength DefaultConstant 8True FixedLength DefaultConstant TrueTrue
rowversion	n/a	Edm.Binary	Facet name Attribute name Value MaxLength DefaultConstant 8True FixedLength DefaultConstant TrueTrue
smalldatetime	n/a	Edm.DateTime	Facet name Attribute name Value Precision DefaultConstant 0True
datetime	n/a	Edm.DateTime	Facet name Attribute name Value Precision DefaultConstant 3True
date Note: This type is not supported in SQL Server 2005 and SQL Server 2000.	n/a	Edm.DateTime	Facet name Attribute name Value Precision DefaultConstant 0Flase
time Note: This type is not supported in SQL Server 2005 and SQL Server 2000.	n/a	Edm.Time	Facet name Attribute name Value Precision DefaultConstant 7Flalse
datetime2 Note: This type is not supported in SQL Server 2005 and SQL Server 2000.	n/a	Edm.DateTime	Facet name Attribute name Value Precision DefaultConstant 7Flalse
datetimeoffset Note: This type is not supported in SQL Server 2005 and SQL Server 2000.	n/a	Edm.DateTimeOffset	Facet name Attribute name Value Precision DefaultConstant 7Flalse
nvarchar Note: This type is not supported in SQL Server 2000.	n/a	Edm.String	Facet name Attribute name Value MaxLength MinimumMaximumDefaultConstant 140004000False Unicode DefaultConstant TrueTrue FixedLength DefaultConstant FalseTrue
varchar Note: This type is not supported in SQL Server 2000.	n/a	Edm.String	Facet name Attribute name Value MaxLength MinimumMaximumDefaultConstant 180008000False Unicode DefaultConstant FalseTrue FixedLength DefaultConstant FalseTrue
char	n/a	Edm.String	Facet name Attribute name Value MaxLength MinimumMaximumDefaultConstant 180008000False Unicode DefaultConstant FalseTrue FixedLength DefaultConstant TrueTrue
nchar	n/a	Edm.String	Facet name Attribute name Value MaxLength MinimumMaximumDefaultConstant 140004000False Unicode DefaultConstant TrueTrue FixedLength DefaultConstant TrueTrue
varchar(max)	n/a	Edm.String	Facet name Attribute name Value MaxLength DefaultConstant 2147483647True Unicode DefaultConstant FalseTrue FixedLength DefaultConstant FalseTrue
nvarchar(max)	n/a	Edm.String	Facet name Attribute name Value MaxLength DefaultConstant 1073741823True Unicode DefaultConstant TrueTrue FixedLength DefaultConstant FalseTrue
ntext	Attribute name Value Equal comparable False Ordercomparable False	Edm.String	Facet name Attribute name Value MaxLength DefaultConstant 1073741823True Unicode DefaultConstant FalseTrue FixedLength DefaultConstant FalseTrue
text	Attribute name Value Equal comparable False Order comparable False	Edm.String	Facet name Attribute name Value MaxLength DefaultConstant 2147483647True Unicode DefaultConstant FalseTrue FixedLength DefaultConstant FalseTrue
Unique identifier	Attribute name Value Equalcomparable True Order comparable True	Edm.Guid	n/a
xml	Attribute name Value Equal comparable False Order comparable False	Edm.String	Facet name Attribute name Value MaxLength DefaultConstant 1073741823True Unicode DefaultConstant TrueTrue FixedLength DefaultConstant FalseTrue

 

SqlClient for Entity Framework Functions

http://blogs.msdn.com/b/efdesign/archive/2009/01/07/model-defined-functions.aspx

http://msdn.microsoft.com/en-us/library/bb399302.aspx

Entity Data Model Tools

 

 

O. R. Mapping http://msdn.microsoft.com/zh-cn/library/cc716779(v=vs.110).aspx

 

 

Together with the Entity Framework runtime, the .NET Framework version 4 includes the EDM Generator (EdmGen.exe). This command prompt utility connects to a data source and generates model and mapping files based on a one-to-one mapping between entities and tables. It also uses a conceptual model file (.csdl) to generate an object layer file that contains classes that represent entity types and the ObjectContext. For more information, see EDM Generator (EdmGen.exe).

Visual Studio 2010 includes rich tool support for generating and maintaining model and mapping files in a Visual Studio application. The Entity Data Model Designer supports creating advanced mapping scenarios, such as table-per-type and table-per-hierarchy inheritance and split entities that map to multiple tables. For more information, see ADO.NET Entity Data Model Designer.

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