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.

 

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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 PrecisionMinimumMaximumDefaultConstant13818False ScaleMinimumMaximumDefaultConstant0380False
numeric	n/a	Edm.Decimal	Facet name Attribute name Value PrecisionMinimumMaximumDefaultConstant13818False ScaleMinimumMaximumDefaultConstant0380False
smallmoney	n/a	Edm.Decimal	Facet name Attribute name Value PrecisionDefaultConstant10True ScaleDefaultConstant4True
money	n/a	Edm.Decimal	Facet name Attribute name Value PrecisionDefaultConstant19True ScaleDefaultConstant4True
binary	n/a	Edm.Binary	Facet name Attribute name Value MaxLengthMinimumMaximumDefaultConstant180008000False FixedLengthDefaultConstantTrueTrue
varbinary	n/a	Edm.Binary	Facet name Attribute name Value MaxLengthMinimumMaximumDefaultConstant180008000False FixedLengthDefaultConstantFalseTrue
varbinary(max) Note: This type is not supported in SQL Server 2000.	n/a	Edm.Binary	Facet name Attribute name Value MaxLengthDefaultConstant214748364780True FixedLengthDefaultConstantFalseTrue
image	n/a	Edm.Binary	Facet name Attribute name Value MaxLengthDefaultConstant2147483647True FixedLengthDefaultConstantFalseTrue
timestamp	n/a	Edm.Binary	Facet name Attribute name Value MaxLengthDefaultConstant8True FixedLengthDefaultConstantTrueTrue
rowversion	n/a	Edm.Binary	Facet name Attribute name Value MaxLengthDefaultConstant8True FixedLengthDefaultConstantTrueTrue
smalldatetime	n/a	Edm.DateTime	Facet name Attribute name Value PrecisionDefaultConstant0True
datetime	n/a	Edm.DateTime	Facet name Attribute name Value PrecisionDefaultConstant3True
date Note: This type is not supported in SQL Server 2005 and SQL Server 2000.	n/a	Edm.DateTime	Facet name Attribute name Value PrecisionDefaultConstant0Flase
time Note: This type is not supported in SQL Server 2005 and SQL Server 2000.	n/a	Edm.Time	Facet name Attribute name Value PrecisionDefaultConstant7Flalse
datetime2 Note: This type is not supported in SQL Server 2005 and SQL Server 2000.	n/a	Edm.DateTime	Facet name Attribute name Value PrecisionDefaultConstant7Flalse
datetimeoffset Note: This type is not supported in SQL Server 2005 and SQL Server 2000.	n/a	Edm.DateTimeOffset	Facet name Attribute name Value PrecisionDefaultConstant7Flalse
nvarchar Note: This type is not supported in SQL Server 2000.	n/a	Edm.String	Facet name Attribute name Value MaxLengthMinimumMaximumDefaultConstant140004000False UnicodeDefaultConstantTrueTrue FixedLengthDefaultConstantFalseTrue
varchar Note: This type is not supported in SQL Server 2000.	n/a	Edm.String	Facet name Attribute name Value MaxLengthMinimumMaximumDefaultConstant180008000False UnicodeDefaultConstantFalseTrue FixedLengthDefaultConstantFalseTrue
char	n/a	Edm.String	Facet name Attribute name Value MaxLengthMinimumMaximumDefaultConstant180008000False UnicodeDefaultConstantFalseTrue FixedLengthDefaultConstantTrueTrue
nchar	n/a	Edm.String	Facet name Attribute name Value MaxLengthMinimumMaximumDefaultConstant140004000False UnicodeDefaultConstantTrueTrue FixedLengthDefaultConstantTrueTrue
varchar(max)	n/a	Edm.String	Facet name Attribute name Value MaxLengthDefaultConstant2147483647True UnicodeDefaultConstantFalseTrue FixedLengthDefaultConstantFalseTrue
nvarchar(max)	n/a	Edm.String	Facet name Attribute name Value MaxLengthDefaultConstant1073741823True UnicodeDefaultConstantTrueTrue FixedLengthDefaultConstantFalseTrue
ntext	Attribute name Value Equal comparableFalse OrdercomparableFalse	Edm.String	Facet name Attribute name Value MaxLengthDefaultConstant1073741823True UnicodeDefaultConstantFalseTrue FixedLengthDefaultConstantFalseTrue
text	Attribute name Value Equal comparableFalse Order comparableFalse	Edm.String	Facet name Attribute name Value MaxLengthDefaultConstant2147483647True UnicodeDefaultConstantFalseTrue FixedLengthDefaultConstantFalseTrue
Unique identifier	Attribute name Value EqualcomparableTrue Order comparableTrue	Edm.Guid	n/a
xml	Attribute name Value Equal comparableFalse Order comparableFalse	Edm.String	Facet name Attribute name Value MaxLengthDefaultConstant1073741823True UnicodeDefaultConstantTrueTrue FixedLengthDefaultConstantFalseTrue

 

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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.