EdmFunctionAttribute Class
 

An attribute that, when applied to a method, indicates that the method is a proxy for a function in the conceptual model or storage model.

Namespace:   System.Data.Objects.DataClasses
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

SystemObject
   SystemAttribute
    System.Data.Objects.DataClassesEdmFunctionAttribute

[AttributeUsageAttribute(AttributeTargets.Method, Inherited = false, 
	AllowMultiple = false)]
public sealed class EdmFunctionAttribute : Attribute
[AttributeUsageAttribute(AttributeTargets::Method, Inherited = false, 
	AllowMultiple = false)]
public ref class EdmFunctionAttribute sealed : Attribute
[<Sealed>]
[<AttributeUsageAttribute(AttributeTargets.Method, Inherited = false,
    AllowMultiple = false)>]
type EdmFunctionAttribute = 
    class
        inherit Attribute
    end
<AttributeUsageAttribute(AttributeTargets.Method, Inherited := False,
	AllowMultiple := False)>
Public NotInheritable Class EdmFunctionAttribute
	Inherits Attribute
NameDescription
System_CAPS_pubmethod EdmFunctionAttribute

Initializes a new instance of the EdmFunctionAttribute class.

NameDescription
System_CAPS_pubproperty

The name of the mapped-to function.

System_CAPS_pubproperty

The namespace of the mapped-to function.

System_CAPS_pubproperty

When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)

NameDescription
System_CAPS_pubmethod Equals

This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)

System_CAPS_pubmethod GetHashCode

Returns the hash code for this instance.(Inherited from Attribute.)

System_CAPS_pubmethod GetType

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethod IsDefaultAttribute

When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)

System_CAPS_pubmethod Match

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)

System_CAPS_pubmethod ToString

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubinterface System_CAPS_privmethod _AttributeGetIDsOfNames

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterface System_CAPS_privmethod _AttributeGetTypeInfo

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)

System_CAPS_pubinterface System_CAPS_privmethod _AttributeGetTypeInfoCount

Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterface System_CAPS_privmethod _AttributeInvoke

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

An EdmFunctionAttribute links a common language runtime (CLR) method to another function. For example, the attribute can be used to map a CLR method to a function that is exposed by the storage provider, to a user-defined function in the database, or to a user-defined function in the conceptual model. Methods that have this attribute can be called from LINQ to Entities queries.

To use an EdmFunctionAttribute to map a CLR method to a function, the following must be true:

  • The return type of the CLR method must be compatible with the return type of the mapped-to function.

  • The argument types of the CLR method must be compatible with the argument types of the mapped-to function.

For information about compatible types, see Conceptual Model Types (CSDL).

.NET Framework
Available since 4.0

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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