Clase DataFile

The DataFile object represents a SQL Server data file.

Jerarquía de herencia

System.Object
  Microsoft.SqlServer.Management.Smo.SmoObjectBase
    Microsoft.SqlServer.Management.Smo.SqlSmoObject
      Microsoft.SqlServer.Management.Smo.NamedSmoObject
        Microsoft.SqlServer.Management.Smo.DatabaseFile
          Microsoft.SqlServer.Management.Smo.DataFile

Espacio de nombres:  Microsoft.SqlServer.Management.Smo
Ensamblado:  Microsoft.SqlServer.Smo (en Microsoft.SqlServer.Smo.dll)

Sintaxis

'Declaración
<PhysicalFacetAttribute> _
<SfcElementTypeAttribute("File")> _
<EvaluationModeAttribute(AutomatedPolicyEvaluationMode.CheckOnSchedule)> _
Public NotInheritable Class DataFile _
    Inherits DatabaseFile _
    Implements ICreatable, ISfcSupportsDesignMode
'Uso
Dim instance As DataFile

[PhysicalFacetAttribute]
[SfcElementTypeAttribute("File")]
[EvaluationModeAttribute(AutomatedPolicyEvaluationMode.CheckOnSchedule)]
public sealed class DataFile : DatabaseFile, 
    ICreatable, ISfcSupportsDesignMode

[PhysicalFacetAttribute]
[SfcElementTypeAttribute(L"File")]
[EvaluationModeAttribute(AutomatedPolicyEvaluationMode::CheckOnSchedule)]
public ref class DataFile sealed : public DatabaseFile, 
    ICreatable, ISfcSupportsDesignMode

[<SealedAttribute>]
[<PhysicalFacetAttribute>]
[<SfcElementTypeAttribute("File")>]
[<EvaluationModeAttribute(AutomatedPolicyEvaluationMode.CheckOnSchedule)>]
type DataFile =  
    class 
        inherit DatabaseFile 
        interface ICreatable 
        interface ISfcSupportsDesignMode 
    end

public final class DataFile extends DatabaseFile implements ICreatable, ISfcSupportsDesignMode

El tipo DataFile expone los siguientes miembros.

Constructores

	Nombre	Descripción
	DataFile()	Initializes a new instance of the DataFile class.
	DataFile(FileGroup, String)	Initializes a new instance of the DataFile class on the specified file group with the specified name.
	DataFile(FileGroup, String, String)	Initializes a new instance of the DataFile class on the specified file group with the specified name and file name.

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Propiedades

	Nombre	Descripción
	AvailableSpace	Gets the amount of available space in the data file in KB.
	BytesReadFromDisk	Gets the number of bytes read from disk.
	BytesWrittenToDisk	Gets the number of bytes written to disk.
	FileName	Gets or sets the data file name.
	Growth	Gets or sets the growth increment for the data file in KB or percent.
	GrowthType	Gets or sets the growth type for the data file in kilobytes or percent.
	ID	Gets the ID value that uniquely identifies the data file.
	IsOffline	Gets the Boolean property value that specifies whether the data file is offline or not.
	IsPrimaryFile	Gets the Boolean property value that specifies whether the data file is the primary file of the database.
	IsReadOnly	Gets the Boolean property value that specifies whether the data file is read-only or can be updated.
	IsReadOnlyMedia	Gets the Boolean property value that specifies whether the data file is stored on read-only media.
	IsSparse	Gets the Boolean value that specifies whether the file is a sparse file. Sparse files are used in database snapshots.
	MaxSize	Gets or set the maximum size to which the data file can grow in KB.
	Name	Gets or sets the name of the object. (Se hereda de NamedSmoObject.)
	NumberOfDiskReads	Gets the number of disk reads.
	NumberOfDiskWrites	Gets the number of disk writes.
	Parent	Gets or sets the FileGroup object that is the parent of the DataFile object.
	Properties	Gets a collection of Property objects that represent the object properties. (Se hereda de SqlSmoObject.)
	Size	Gets or sets the current size of the data file in KB.
	State	Gets the state of the referenced object. (Se hereda de SmoObjectBase.)
	Urn	Gets the Uniform Resource Name (URN) address value that uniquely identifies the object. (Se hereda de SqlSmoObject.)
	UsedSpace	Gets the amount of used space in the data file in KB.
	UserData	Gets or sets user-defined data associated with the referenced object. (Se hereda de SmoObjectBase.)
	VolumeFreeSpace	Gets the volume free space in bytes.

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Métodos

	Nombre	Descripción
	Alter	Updates any property changes to the object to the instance of Microsoft SQL Server. (Se hereda de DatabaseFile.)
	Create	Creates a data file on the instance of SQL Server as defined by the DataFile object.
	Discover	Discovers a list of type Object. (Se hereda de SqlSmoObject.)
	Drop	Drops a database file. (Se hereda de DatabaseFile.)
	Equals	(Se hereda de Object.)
	FormatSqlVariant	Formats an object as SqlVariant type. (Se hereda de SqlSmoObject.)
	GetContextDB	Gets the context database that is associated with this object. (Se hereda de SqlSmoObject.)
	GetDBName	Gets the database name that is associated with the object. (Se hereda de SqlSmoObject.)
	GetHashCode	(Se hereda de Object.)
	GetPropValue	Gets a property value of the SqlSmoObject object. (Se hereda de SqlSmoObject.)
	GetPropValueOptional	Gets a property value of the SqlSmoObject object. (Se hereda de SqlSmoObject.)
	GetPropValueOptionalAllowNull	Gets a property value of the SqlSmoObject object. (Se hereda de SqlSmoObject.)
	GetServerObject	Gets the server of the SqlSmoObject object. (Se hereda de SqlSmoObject.)
	GetType	(Se hereda de Object.)
	Initialize()	Initializes the object and forces the properties be loaded. (Se hereda de SqlSmoObject.)
	Initialize(Boolean)	Initializes the object and forces the properties be loaded. (Se hereda de SqlSmoObject.)
	IsObjectInitialized	Verifies whether the object has been initialized. (Se hereda de SqlSmoObject.)
	IsObjectInSpace	Verifies whether the object is isolated or connected to the instance of SQL Server. (Se hereda de SqlSmoObject.)
	MarkForDrop	Marks the database file to be dropped next time its parent object is altered by the Alter method. (Se hereda de DatabaseFile.)
	Refresh	Refreshes the object and retrieves properties when the object is next accessed. (Se hereda de SqlSmoObject.)
	Rename	Renames a database file. (Se hereda de DatabaseFile.)
	SetOffline	Sets the database file status to offline.
	SetParentImpl	Sets the parent of the SqlSmoObject to the newParent parameter. (Se hereda de SqlSmoObject.)
	Shrink	Shrinks a database file. (Se hereda de DatabaseFile.)
	ToString	Returns a String that represents the referenced object. (Se hereda de SqlSmoObject.)
	Validate	Validates the state of an object. (Se hereda de SmoObjectBase.)

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Eventos

	Nombre	Descripción
	PropertyChanged	Represents the event that occurs when a property is changed. (Se hereda de SqlSmoObject.)
	PropertyMetadataChanged	Represents the event that occurs when property metadata changes. (Se hereda de SqlSmoObject.)

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Implementaciones de interfaces explícitas

	Nombre	Descripción
	IAlienObject.Discover	Discovers any dependencies. No haga referencia directamente a este miembro en el código. Admite la infraestructura de SQL Server. (Se hereda de SqlSmoObject.)
	IAlienObject.GetDomainRoot	Returns the root of the domain. (Se hereda de SqlSmoObject.)
	IAlienObject.GetParent	Gets the parent of this object. No haga referencia directamente a este miembro en el código. Admite la infraestructura de SQL Server. (Se hereda de SqlSmoObject.)
	IAlienObject.GetPropertyType	Gets the type of the specified property. (Se hereda de SqlSmoObject.)
	IAlienObject.GetPropertyValue	Gets the value of the specified property. (Se hereda de SqlSmoObject.)
	IAlienObject.GetUrn	Gets the Unified Resource Name (URN) of the object. No haga referencia directamente a este miembro en el código. Admite la infraestructura de SQL Server. (Se hereda de SqlSmoObject.)
	IAlienObject.Resolve	Gets the instance that contains the information about the object from the Unified Resource Name (URN) of the object. (Se hereda de SqlSmoObject.)
	IAlienObject.SetObjectState	Sets the object state to the specified SfcObjectState value. (Se hereda de SqlSmoObject.)
	IAlienObject.SetPropertyValue	Sets the property value. (Se hereda de SqlSmoObject.)
	ISfcPropertyProvider.GetPropertySet	Gets the interface reference to the set of properties of this object. (Se hereda de SqlSmoObject.)
	ISfcSupportsDesignMode.IsDesignMode	Gets a Boolean value that indicates whether the object supports design mode.

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Comentarios

To get the DataFile object properties, users can be a member of the public fixed server role.

To set the DataFile object properties, users must have ALTER permission on the database or be a member of the db_owner fixed database role.

To create a data file, users must have ALTER permission on the database or be a member of the db_owner fixed database role.

To drop a data file, users must have ALTER permission on the database or be a member of the db_owner fixed database role.

Thread Safety

Todos los miembros estáticos (compartidos en Microsoft Visual Basic) públicos de este tipo son seguros para operaciones multiproceso. No se garantiza que los miembros de instancia sean seguros para subprocesos.

Ejemplos

Utilizar grupos de archivos y archivos para almacenar datos

Seguridad para subprocesos

Cualquier miembro público static (Shared en Visual Basic) de este tipo es seguro para subprocesos. No se garantiza que los miembros de instancia sean seguros para subprocesos.

Vea también

Referencia

Espacio de nombres Microsoft.SqlServer.Management.Smo

Otros recursos

Arquitectura de archivos y grupos de archivos

CREATE DATABASE (Transact-SQL)