Класс ForeignKey
The ForeignKey object represents a SQL Server foreign key.
Иерархия наследования
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
Пространство имен: Microsoft.SqlServer.Management.Smo
Сборка: Microsoft.SqlServer.Smo (в Microsoft.SqlServer.Smo.dll)
Синтаксис
'Декларация
Public NotInheritable Class ForeignKey _
Inherits ScriptNameObjectBase _
Implements ICreatable, IDroppable, IMarkForDrop, IAlterable, _
IRenamable, IExtendedProperties, IScriptable, ISfcSupportsDesignMode
'Применение
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
Тип ForeignKey обеспечивает доступ к следующим элементам.
Конструкторы
Имя | Описание | |
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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. |
В начало
Свойства
Имя | Описание | |
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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. (Переопределяет 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. (Производный от 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. (Производный от 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. (Производный от SqlSmoObject.) |
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UserData | Gets or sets user-defined data associated with the referenced object. (Производный от SmoObjectBase.) |
В начало
Методы
Имя | Описание | |
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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. (Производный от SqlSmoObject.) |
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Drop | Drops the foreign key. |
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Equals | (Производный от Object.) |
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FormatSqlVariant | Formats an object as SqlVariant type. (Производный от SqlSmoObject.) |
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GetContextDB | Gets the context database that is associated with this object. (Производный от SqlSmoObject.) |
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GetDBName | Gets the database name that is associated with the object. (Производный от SqlSmoObject.) |
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GetHashCode | (Производный от Object.) |
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GetPropValue | Gets a property value of the SqlSmoObject object. (Производный от SqlSmoObject.) |
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GetPropValueOptional | Gets a property value of the SqlSmoObject object. (Производный от SqlSmoObject.) |
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GetPropValueOptionalAllowNull | Gets a property value of the SqlSmoObject object. (Производный от SqlSmoObject.) |
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GetServerObject | Gets the server of the SqlSmoObject object. (Производный от SqlSmoObject.) |
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GetType | (Производный от Object.) |
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Initialize() | Initializes the object and forces the properties be loaded. (Производный от SqlSmoObject.) |
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Initialize(Boolean) | Initializes the object and forces the properties be loaded. (Производный от SqlSmoObject.) |
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IsObjectInitialized | Verifies whether the object has been initialized. (Производный от SqlSmoObject.) |
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IsObjectInSpace | Verifies whether the object is isolated or connected to the instance of SQL Server. (Производный от 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. (Производный от 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. (Производный от SqlSmoObject.) |
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ToString | Returns a String that represents the referenced object. (Производный от SqlSmoObject.) |
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Validate | Validates the state of an object. (Производный от SmoObjectBase.) |
В начало
События
Имя | Описание | |
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PropertyChanged | Represents the event that occurs when a property is changed. (Производный от SqlSmoObject.) |
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PropertyMetadataChanged | Represents the event that occurs when property metadata changes. (Производный от SqlSmoObject.) |
В начало
Явные реализации интерфейса
Имя | Описание | |
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IAlienObject.Discover | Discovers any dependencies. Не ссылайтесь на этот элемент непосредственно из кода. Он поддерживает работу инфраструктуры SQL Server. (Производный от SqlSmoObject.) |
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IAlienObject.GetDomainRoot | Returns the root of the domain. (Производный от SqlSmoObject.) |
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IAlienObject.GetParent | Gets the parent of this object. Не ссылайтесь на этот элемент непосредственно из кода. Он поддерживает работу инфраструктуры SQL Server. (Производный от SqlSmoObject.) |
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IAlienObject.GetPropertyType | Gets the type of the specified property. (Производный от SqlSmoObject.) |
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IAlienObject.GetPropertyValue | Gets the value of the specified property. (Производный от SqlSmoObject.) |
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IAlienObject.GetUrn | Gets the Unified Resource Name (URN) of the object. Не ссылайтесь на этот элемент непосредственно из кода. Он поддерживает работу инфраструктуры SQL Server. (Производный от 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. (Производный от SqlSmoObject.) |
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IAlienObject.SetObjectState | Sets the object state to the specified SfcObjectState value. (Производный от SqlSmoObject.) |
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IAlienObject.SetPropertyValue | Sets the property value. (Производный от SqlSmoObject.) |
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ISfcPropertyProvider.GetPropertySet | Gets the interface reference to the set of properties of this object. (Производный от SqlSmoObject.) |
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ISfcSupportsDesignMode.IsDesignMode | Gets a Boolean value that indicates whether the object supports design mode. Указано только в ознакомительных целях. Не поддерживается. Совместимость с будущими версиями не гарантируется. |
В начало
Замечания
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
Все общие статические члены этого типа (Shared в Microsoft Visual Basic) можно использовать в многопоточных операциях. Потокобезопасная работа с членами экземпляров типа не гарантируется.
Примеры
Создание, изменение и удаление внешних ключей
Безопасность многопоточности
Любые открытые статический (Shared в Visual Basic) элементы этого типа потокобезопасны. Потокобезопасность с элементами экземпляров не гарантируется.
См. также
Справочник
Пространство имен Microsoft.SqlServer.Management.Smo