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MetadataTools

Responsible for making the Entity Framework Metadata more accessible for code generation.

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Syntax

public static class MetadataTools

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Inheritance

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Methods

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ClrType

public static Type ClrType(TypeUsage typeUsage)
This method returns the underlying CLR type of the o-space type corresponding to the supplied typeUsage Note that for an enum type this means that the type backing the enum will be returned, not the enum type itself.

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Parameters

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Returns

Type

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Comment

public static string Comment(EdmProperty edmProperty)

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Parameters

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Returns

string

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Comment

public static string Comment(EdmType edmType)

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Parameters

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Returns

string

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Comment

public static string Comment(EntityContainer container)

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Parameters

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Returns

string

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Comment

public static string Comment(EntitySet entitySet)

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Parameters

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Returns

string

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Comment

public static string Comment(NavigationProperty navigationProperty)

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Parameters

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Returns

string

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GetCorrespondingDependentProperty

public static EdmProperty GetCorrespondingDependentProperty(NavigationProperty navProperty, EdmProperty principalProperty)
Given a property on the principal end of a referential constraint, returns the corresponding property on the dependent end. Requires: The association has a referential constraint, and the specified principalProperty is one of the properties on the principal end.

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Parameters

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Returns

EdmProperty

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GetCorrespondingPrincipalProperty

public static EdmProperty GetCorrespondingPrincipalProperty(NavigationProperty navProperty, EdmProperty dependentProperty)
Given a property on the dependent end of a referential constraint, returns the corresponding property on the principal end. Requires: The association has a referential constraint, and the specified dependentProperty is one of the properties on the dependent end.

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Parameters

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Returns

EdmProperty

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GetDependentProperties

public static ReadOnlyMetadataCollection<EdmProperty> GetDependentProperties(NavigationProperty navProperty)
Gets the collection of properties that are on the dependent end of a referential constraint for the specified navigation property. Requires: The association has a referential constraint.

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Parameters

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Returns

ReadOnlyMetadataCollection<EdmProperty>

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GetElementType

public static TypeUsage GetElementType(TypeUsage typeUsage)
If the passed in TypeUsage represents a collection this method returns final element type of the collection, otherwise it returns the value passed in.

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Parameters

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Returns

TypeUsage

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GetPrincipalProperties

public static ReadOnlyMetadataCollection<EdmProperty> GetPrincipalProperties(NavigationProperty navProperty)
Gets the collection of properties that are on the principal end of a referential constraint for the specified navigation property. Requires: The association has a referential constraint.

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Parameters

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Returns

ReadOnlyMetadataCollection<EdmProperty>

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GetSubtypesOf

public static IEnumerable<EntityType> GetSubtypesOf(EntityType type, ItemCollection itemCollection, bool includeAbstractTypes)
Returns the subtype of the EntityType in the current itemCollection

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Parameters

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Returns

IEnumerable<EntityType>

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Inverse

public static NavigationProperty Inverse(NavigationProperty navProperty)
Returns the NavigationProperty that is the other end of the same association set if it is available, otherwise it returns null.

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Parameters

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Returns

NavigationProperty

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IsCascadeDeletePrincipal

public static bool IsCascadeDeletePrincipal(AssociationEndMember associationEnd)
True if the specified association end is the principal in an identifying relationship. or if the association end has cascade delete defined.

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Parameters

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Returns

bool

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IsCascadeDeletePrincipal

public static bool IsCascadeDeletePrincipal(NavigationProperty navProperty)
True if the source end of the specified navigation property is the principal in an identifying relationship. or if the source end has cascade delete defined.

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Parameters

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Returns

bool

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IsIdentifyingRelationship

public static bool IsIdentifyingRelationship(AssociationType association)
True if the specified association type is an identifying relationship. In order to be an identifying relationship, the association must have a referential constraint where all of the dependent properties are part of the dependent type’s primary key.

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Parameters

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Returns

bool

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IsKey

public static bool IsKey(EdmProperty property)
True if the EdmProperty is a key of its DeclaringType, False otherwise.

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Parameters

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Returns

bool

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IsLazyLoadingEnabled

public static bool IsLazyLoadingEnabled(EntityContainer container)

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Parameters

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Returns

bool

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IsNullable

public static bool IsNullable(EdmProperty property)
True if the EdmProperty TypeUsage is Nullable, False otherwise.

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Parameters

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Returns

bool

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IsNullable

public static bool IsNullable(TypeUsage typeUsage)
True if the TypeUsage is Nullable, False otherwise.

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Parameters

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Returns

bool

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IsPrincipalEndOfIdentifyingRelationship

public static bool IsPrincipalEndOfIdentifyingRelationship(AssociationEndMember associationEnd)
True if the specified association end is the principal end in an identifying relationship. In order to be an identifying relationship, the association must have a referential constraint where all of the dependent properties are part of the dependent type’s primary key.

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Parameters

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Returns

bool

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IsSubtypeOf

public static bool IsSubtypeOf(EdmType firstType, EdmType secondType)
requires: firstType is not null effects: if secondType is among the base types of the firstType, return true, otherwise returns false. when firstType is same as the secondType, return false.

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Parameters

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Returns

bool

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NeedsHandleCascadeDeleteMethod

public static bool NeedsHandleCascadeDeleteMethod(ItemCollection itemCollection, EntityType entityType)
True if this entity type requires the HandleCascadeDelete method defined and the method has not been defined on any base type

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Parameters

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Returns

bool

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TryGetStringMetadataPropertySetting

public static bool TryGetStringMetadataPropertySetting(MetadataItem item, string propertyName, out string value)

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Parameters

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Returns

bool

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UnderlyingClrType

public static Type UnderlyingClrType(EdmType edmType)
This method returns the underlying CLR type given the c-space type. Note that for an enum type this means that the type backing the enum will be returned, not the enum type itself.

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Parameters

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Returns

Type
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