Classe DataFile
The DataFile object represents a SQL Server data file.
Gerarchia di ereditarietà
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
Spazio dei nomi Microsoft.SqlServer.Management.Smo
Assembly: Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)
Sintassi
'Dichiarazione
<PhysicalFacetAttribute> _
<SfcElementTypeAttribute("File")> _
<EvaluationModeAttribute(AutomatedPolicyEvaluationMode.CheckOnSchedule)> _
Public NotInheritable Class DataFile _
Inherits DatabaseFile _
Implements ICreatable, ISfcSupportsDesignMode
'Utilizzo
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
Nel tipo DataFile sono esposti i membri seguenti.
Costruttori
Nome | Descrizione | |
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DataFile() | Initializes a new instance of the DataFile class. |
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DataFile(FileGroup, String) | Initializes a new instance of the DataFile class on the specified file group with the specified name. |
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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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Proprietà
Nome | Descrizione | |
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AvailableSpace | Gets the amount of available space in the data file in KB. |
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BytesReadFromDisk | Gets the number of bytes read from disk. |
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BytesWrittenToDisk | Gets the number of bytes written to disk. |
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FileName | Gets or sets the data file name. |
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Growth | Gets or sets the growth increment for the data file in KB or percent. |
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GrowthType | Gets or sets the growth type for the data file in kilobytes or percent. |
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ID | Gets the ID value that uniquely identifies the data file. |
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IsOffline | Gets the Boolean property value that specifies whether the data file is offline or not. |
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IsPrimaryFile | Gets the Boolean property value that specifies whether the data file is the primary file of the database. |
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IsReadOnly | Gets the Boolean property value that specifies whether the data file is read-only or can be updated. |
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IsReadOnlyMedia | Gets the Boolean property value that specifies whether the data file is stored on read-only media. |
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IsSparse | Gets the Boolean value that specifies whether the file is a sparse file. Sparse files are used in database snapshots. |
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MaxSize | Gets or set the maximum size to which the data file can grow in KB. |
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Name | Gets or sets the name of the object. Ereditato da NamedSmoObject. |
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NumberOfDiskReads | Gets the number of disk reads. |
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NumberOfDiskWrites | Gets the number of disk writes. |
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Parent | Gets or sets the FileGroup object that is the parent of the DataFile object. |
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Properties | Gets a collection of Property objects that represent the object properties. Ereditato da SqlSmoObject. |
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Size | Gets or sets the current size of the data file in KB. |
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State | Gets the state of the referenced object. Ereditato da SmoObjectBase. |
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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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UsedSpace | Gets the amount of used space in the data file in KB. |
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UserData | Gets or sets user-defined data associated with the referenced object. Ereditato da SmoObjectBase. |
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VolumeFreeSpace | Gets the volume free space in bytes. |
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Metodi
Nome | Descrizione | |
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Alter | Updates any property changes to the object to the instance of Microsoft SQL Server. Ereditato da DatabaseFile. |
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Create | Creates a data file on the instance of SQL Server as defined by the DataFile object. |
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Discover | Discovers a list of type Object. Ereditato da SqlSmoObject. |
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Drop | Drops a database file. Ereditato da DatabaseFile. |
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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 database file to be dropped next time its parent object is altered by the Alter method. Ereditato da DatabaseFile. |
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Refresh | Refreshes the object and retrieves properties when the object is next accessed. Ereditato da SqlSmoObject. |
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Rename | Renames a database file. Ereditato da DatabaseFile. |
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SetOffline | Sets the database file status to offline. |
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SetParentImpl | Sets the parent of the SqlSmoObject to the newParent parameter. Ereditato da SqlSmoObject. |
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Shrink | Shrinks a database file. Ereditato da DatabaseFile. |
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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. |
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Osservazioni
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
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
Utilizzo di filegroup e file per archiviare dati
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