EdmFunctionAttribute Class
Definition
Important
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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.
public ref class EdmFunctionAttribute sealed : Attribute[System.AttributeUsage(System.AttributeTargets.Method, AllowMultiple=false, Inherited=false)]
public sealed class EdmFunctionAttribute : Attribute[<System.AttributeUsage(System.AttributeTargets.Method, AllowMultiple=false, Inherited=false)>]
type EdmFunctionAttribute = class
inherit AttributePublic NotInheritable Class EdmFunctionAttribute
Inherits Attribute- Inheritance
- Attributes
Remarks
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).
Constructors
| EdmFunctionAttribute(String, String) |
Initializes a new instance of the EdmFunctionAttribute class. |
Properties
| FunctionName |
The name of the mapped-to function. |
| NamespaceName |
The namespace of the mapped-to function. |
| TypeId |
When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute) |
Methods
| Equals(Object) |
Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute) |
| GetHashCode() |
Returns the hash code for this instance. (Inherited from Attribute) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| 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) |
| Match(Object) |
When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute) |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
Explicit Interface Implementations
| _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) |
Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute) |
| _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) |
Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute) |
| _Attribute.GetTypeInfoCount(UInt32) |
Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute) |
| _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) |
Provides access to properties and methods exposed by an object. (Inherited from Attribute) |
