DataFile 类
The DataFile object represents a SQL Server data file.
继承层次结构
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
命名空间: Microsoft.SqlServer.Management.Smo
程序集: Microsoft.SqlServer.Smo(在 Microsoft.SqlServer.Smo.dll 中)
语法
声明
<PhysicalFacetAttribute> _
<SfcElementTypeAttribute("File")> _
<EvaluationModeAttribute(AutomatedPolicyEvaluationMode.CheckOnSchedule)> _
Public NotInheritable Class DataFile _
Inherits DatabaseFile _
Implements ICreatable, ISfcSupportsDesignMode
用法
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
DataFile 类型公开以下成员。
构造函数
名称 | 说明 | |
---|---|---|
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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属性
名称 | 说明 | |
---|---|---|
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. | |
ExecuteForScalar | 获取或设置 Boolean 属性值,该值指定对象是否设置为针对标量选项执行。 (从 SqlSmoObject 继承。) | |
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. | |
IsTouched | 获取 Boolean 属性值,该值指定在服务器上对象属性是否已更新但尚未持久化。 (从 SqlSmoObject 继承。) | |
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. (从 NamedSmoObject 继承。) | |
NumberOfDiskReads | Gets the number of disk reads. | |
NumberOfDiskWrites | Gets the number of disk writes. | |
ObjectInSpace | 获取 Boolean 属性值,该值指定对象是否单独存在,或者对象是否直接或间接连接到 SQL Server 的实例。 (从 SqlSmoObject 继承。) | |
Parent | Gets or sets the FileGroup object that is the parent of the DataFile object. | |
Properties | 获取表示对象属性的 Property 对象的集合。 (从 SqlSmoObject 继承。) | |
ScalarResult | 获取所引用对象的标量结果。 (从 SqlSmoObject 继承。) | |
Size | Gets or sets the current size of the data file in KB. | |
State | Gets the state of the referenced object. (从 SmoObjectBase 继承。) | |
Urn | 获取唯一标识对象的统一资源名称 (URN) 地址值。 (从 SqlSmoObject 继承。) | |
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. (从 SmoObjectBase 继承。) | |
VolumeFreeSpace | Gets the volume free space in bytes. |
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方法
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事件
名称 | 说明 | |
---|---|---|
PropertyChanged | 表示更改属性时发生的事件。 (从 SqlSmoObject 继承。) | |
PropertyMetadataChanged | 表示属性元数据更改时发生的事件。 (从 SqlSmoObject 继承。) |
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字段
名称 | 说明 | |
---|---|---|
m_ExtendedProperties | 表示一个属性,可以对该属性进行定义以便扩展 SqlSmoObject 提供的属性。 (从 SqlSmoObject 继承。) | |
singletonParent | 表示单一父级。 (从 SqlSmoObject 继承。) |
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显式接口实现
名称 | 说明 | |
---|---|---|
IAlienObject. . :: . .Discover | 发现任何依赖关系。不要在您的代码中直接引用此成员。它支持 SQL Server 基础结构。 (从 SqlSmoObject 继承。) | |
IAlienObject. . :: . .GetDomainRoot | 返回域的根。 (从 SqlSmoObject 继承。) | |
IAlienObject. . :: . .GetParent | 获取此对象的父对象。不要在您的代码中直接引用此成员。它支持 SQL Server 基础结构。 (从 SqlSmoObject 继承。) | |
IAlienObject. . :: . .GetPropertyType | 获取指定属性的类型。 (从 SqlSmoObject 继承。) | |
IAlienObject. . :: . .GetPropertyValue | 获取指定属性的值。 (从 SqlSmoObject 继承。) | |
IAlienObject. . :: . .GetUrn | 获取对象的统一资源名称。不要在您的代码中直接引用此成员。它支持 SQL Server 基础结构。 (从 SqlSmoObject 继承。) | |
IAlienObject. . :: . .Resolve | 获取一个实例,该实例包含与来自该对象的统一资源名称的对象有关的信息。 (从 SqlSmoObject 继承。) | |
IAlienObject. . :: . .SetObjectState | 将对象状态设置为指定的 SfcObjectState 值。 (从 SqlSmoObject 继承。) | |
IAlienObject. . :: . .SetPropertyValue | 设置属性值。 (从 SqlSmoObject 继承。) | |
ISfcPropertyProvider. . :: . .GetPropertySet | 获取对此对象的属性集的接口引用。不要在您的代码中直接引用此成员。它支持 SQL Server 基础结构。 (从 SqlSmoObject 继承。) | |
ISfcSupportsDesignMode. . :: . .IsDesignMode | Gets a Boolean value that indicates whether the object supports design mode. |
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注释
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
此类型的任何公共静态(Microsoft Visual Basic 中的 Shared)成员在多线程操作中是安全的。不保证所有实例成员都是线程安全的。
线程安全
此类型的任何公共 static(在 Visual Basic 中为 Shared) 成员都是线程安全的。不保证所有实例成员都是线程安全的。