Classe ForeignKey
The ForeignKey object represents a SQL Server foreign key.
Gerarchia di ereditarietà
System.Object
Microsoft.SqlServer.Management.Smo.SmoObjectBase
Microsoft.SqlServer.Management.Smo.SqlSmoObject
Microsoft.SqlServer.Management.Smo.NamedSmoObject
Microsoft.SqlServer.Management.Smo.ScriptNameObjectBase
Microsoft.SqlServer.Management.Smo.ForeignKey
Spazio dei nomi Microsoft.SqlServer.Management.Smo
Assembly: Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)
Sintassi
'Dichiarazione
Public NotInheritable Class ForeignKey _
Inherits ScriptNameObjectBase _
Implements ICreatable, IDroppable, IMarkForDrop, IAlterable, _
IRenamable, IExtendedProperties, IScriptable, ISfcSupportsDesignMode
'Utilizzo
Dim instance As ForeignKey
public sealed class ForeignKey : ScriptNameObjectBase,
ICreatable, IDroppable, IMarkForDrop, IAlterable, IRenamable,
IExtendedProperties, IScriptable, ISfcSupportsDesignMode
public ref class ForeignKey sealed : public ScriptNameObjectBase,
ICreatable, IDroppable, IMarkForDrop, IAlterable, IRenamable,
IExtendedProperties, IScriptable, ISfcSupportsDesignMode
[<SealedAttribute>]
type ForeignKey =
class
inherit ScriptNameObjectBase
interface ICreatable
interface IDroppable
interface IMarkForDrop
interface IAlterable
interface IRenamable
interface IExtendedProperties
interface IScriptable
interface ISfcSupportsDesignMode
end
public final class ForeignKey extends ScriptNameObjectBase implements ICreatable, IDroppable, IMarkForDrop, IAlterable, IRenamable, IExtendedProperties, IScriptable, ISfcSupportsDesignMode
Nel tipo ForeignKey sono esposti i membri seguenti.
Costruttori
Nome | Descrizione | |
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ForeignKey() | Initializes a new instance of the ForeignKey class. |
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ForeignKey(Table, String) | Initializes a new instance of the ForeignKey class on the specified table with the specified name. |
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Proprietà
Nome | Descrizione | |
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Columns | Represents a collection of Column objects. Each Column object represents a column included in the foreign key. |
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CreateDate | Gets the date and time when the foreign key was created. |
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DateLastModified | Gets the date and time when the foreign key was last modified. |
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DeleteAction | Gets or sets the action taken when the row that is referenced by the foreign key is deleted. |
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ExtendedProperties | Represents a collection of ExtendedProperty objects. Each ExtendedProperty object represents an extended property on the ForeignKey object. |
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ID | Gets the ID value that uniquely identifies the foreign key. |
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IsChecked | Gets or sets the Boolean property value that specifies whether the foreign key constraint was enabled without checking existing rows. |
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IsEnabled | Gets or sets the Boolean property value that specifies whether the foreign key is enabled. |
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IsFileTableDefined | Gets or sets whether the file table is defined. |
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IsSystemNamed | Gets the Boolean property value that specifies whether the foreign key is named by the system or by the user. |
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Name | Gets or sets the name of the foreign key. Esegue l'override di NamedSmoObject.Name. |
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NotForReplication | Gets the Boolean property value that specifies whether the foreign key is available for replication. |
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Parent | Gets or sets the Table object that is the parent of the ForeignKey object. |
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Properties | Gets a collection of Property objects that represent the object properties. Ereditato da SqlSmoObject. |
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ReferencedKey | Gets the primary key referenced by the foreign key. |
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ReferencedTable | Gets or sets the table that contains the primary key referenced by the foreign key. |
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ReferencedTableSchema | Gets or sets the table schema that contains the primary key referenced by the foreign key. |
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ScriptReferencedTable | Gets or sets the Boolean value that specifies whether to script the table referenced by the foreign key. |
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ScriptReferencedTableSchema | Gets or sets the Boolean value that specifies whether to script the schema of the table referenced by the foreign key. |
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State | Gets the state of the referenced object. Ereditato da SmoObjectBase. |
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UpdateAction | Gets or sets the Boolean property value that specifies whether the foreign key supports cascading updates. |
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Urn | Gets the Uniform Resource Name (URN) address value that uniquely identifies the object. Ereditato da SqlSmoObject. |
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UserData | Gets or sets user-defined data associated with the referenced object. Ereditato da SmoObjectBase. |
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Metodi
Nome | Descrizione | |
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Alter | Updates any ForeignKey object property changes on instance of SQL Server. |
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Create | Creates a foreign key on the instance of SQL Server as defined by the ForeignKey object. |
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Discover | Discovers a list of type Object. Ereditato da SqlSmoObject. |
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Drop | Drops the foreign key. |
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Equals | Ereditato da Object. |
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FormatSqlVariant | Formats an object as SqlVariant type. Ereditato da SqlSmoObject. |
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GetContextDB | Gets the context database that is associated with this object. Ereditato da SqlSmoObject. |
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GetDBName | Gets the database name that is associated with the object. Ereditato da SqlSmoObject. |
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GetHashCode | Ereditato da Object. |
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GetPropValue | Gets a property value of the SqlSmoObject object. Ereditato da SqlSmoObject. |
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GetPropValueOptional | Gets a property value of the SqlSmoObject object. Ereditato da SqlSmoObject. |
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GetPropValueOptionalAllowNull | Gets a property value of the SqlSmoObject object. Ereditato da SqlSmoObject. |
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GetServerObject | Gets the server of the SqlSmoObject object. Ereditato da SqlSmoObject. |
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GetType | Ereditato da Object. |
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Initialize() | Initializes the object and forces the properties be loaded. Ereditato da SqlSmoObject. |
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Initialize(Boolean) | Initializes the object and forces the properties be loaded. Ereditato da SqlSmoObject. |
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IsObjectInitialized | Verifies whether the object has been initialized. Ereditato da SqlSmoObject. |
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IsObjectInSpace | Verifies whether the object is isolated or connected to the instance of SQL Server. Ereditato da SqlSmoObject. |
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MarkForDrop | Marks the foreign key to be dropped the next time its parent Table object is altered by the Alter method. |
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Refresh | Refreshes the script name. Ereditato da ScriptNameObjectBase. |
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Rename | Renames the foreign key to the specified new name. |
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Script() | Generates a Transact-SQL script that can be used to re-create the foreign key. |
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Script(ScriptingOptions) | Generates a Transact-SQL script that can be used to re-create the foreign key as specified by the script options. |
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SetParentImpl | Sets the parent of the SqlSmoObject to the newParent parameter. Ereditato da SqlSmoObject. |
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ToString | Returns a String that represents the referenced object. Ereditato da SqlSmoObject. |
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Validate | Validates the state of an object. Ereditato da SmoObjectBase. |
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Eventi
Nome | Descrizione | |
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PropertyChanged | Represents the event that occurs when a property is changed. Ereditato da SqlSmoObject. |
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PropertyMetadataChanged | Represents the event that occurs when property metadata changes. Ereditato da SqlSmoObject. |
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Implementazioni esplicite dell'interfaccia
Nome | Descrizione | |
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IAlienObject.Discover | Discovers any dependencies. Non fare riferimento direttamente a questo membro nel codice. Supporta l'infrastruttura di SQL Server. Ereditato da SqlSmoObject. |
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IAlienObject.GetDomainRoot | Returns the root of the domain. Ereditato da SqlSmoObject. |
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IAlienObject.GetParent | Gets the parent of this object. Non fare riferimento direttamente a questo membro nel codice. Supporta l'infrastruttura di SQL Server. Ereditato da SqlSmoObject. |
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IAlienObject.GetPropertyType | Gets the type of the specified property. Ereditato da SqlSmoObject. |
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IAlienObject.GetPropertyValue | Gets the value of the specified property. Ereditato da SqlSmoObject. |
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IAlienObject.GetUrn | Gets the Unified Resource Name (URN) of the object. Non fare riferimento direttamente a questo membro nel codice. Supporta l'infrastruttura di SQL Server. Ereditato da SqlSmoObject. |
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IAlienObject.Resolve | Gets the instance that contains the information about the object from the Unified Resource Name (URN) of the object. Ereditato da SqlSmoObject. |
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IAlienObject.SetObjectState | Sets the object state to the specified SfcObjectState value. Ereditato da SqlSmoObject. |
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IAlienObject.SetPropertyValue | Sets the property value. Ereditato da SqlSmoObject. |
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ISfcPropertyProvider.GetPropertySet | Gets the interface reference to the set of properties of this object. Ereditato da SqlSmoObject. |
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ISfcSupportsDesignMode.IsDesignMode | Gets a Boolean value that indicates whether the object supports design mode. Identificato solo a scopo informativo. Non supportato. Non è garantita la compatibilità con le versioni future. |
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Osservazioni
To get ForeignKey object properties, users can be a member of the public fixed server role.
To set ForeignKey object properties, users must have ALTER permission on the parent table or be a member of the db_owner fixed database role.
To create or drop a foreign key, users must have ALTER permission on the parent table or be a member of the db_owner fixed database role.
Thread Safety
Tutti i membri statici pubblici (Shared in Microsoft Visual Basic) di questo tipo sono sicuri per le operazioni a thread multipli. Non è invece garantita la sicurezza dei membri dell'istanza.
Esempi
Creazione, modifica e rimozione di chiavi esterne
Protezione dei thread
I membri static (Shared in Visual Basic) pubblici di questo tipo sono affidabili. Non è invece garantita la sicurezza dei membri dell'istanza.
Vedere anche
Riferimento
Spazio dei nomi Microsoft.SqlServer.Management.Smo