DefaultConstraint 类
The DefaultConstraint object represents a SQL Server default constraint.
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.ScriptNameObjectBase
Microsoft.SqlServer.Management.Smo.DefaultConstraint
命名空间: Microsoft.SqlServer.Management.Smo
程序集: Microsoft.SqlServer.Smo(在 Microsoft.SqlServer.Smo.dll 中)
语法
声明
<SfcElementTypeAttribute("Default")> _
Public NotInheritable Class DefaultConstraint _
Inherits ScriptNameObjectBase _
Implements ICreatable, IDroppable, IRenamable, IAlterable, _
IExtendedProperties, IScriptable, ISfcSupportsDesignMode
用法
Dim instance As DefaultConstraint
[SfcElementTypeAttribute("Default")]
public sealed class DefaultConstraint : ScriptNameObjectBase,
ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties,
IScriptable, ISfcSupportsDesignMode
[SfcElementTypeAttribute(L"Default")]
public ref class DefaultConstraint sealed : public ScriptNameObjectBase,
ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties,
IScriptable, ISfcSupportsDesignMode
[<SealedAttribute>]
[<SfcElementTypeAttribute("Default")>]
type DefaultConstraint =
class
inherit ScriptNameObjectBase
interface ICreatable
interface IDroppable
interface IRenamable
interface IAlterable
interface IExtendedProperties
interface IScriptable
interface ISfcSupportsDesignMode
end
public final class DefaultConstraint extends ScriptNameObjectBase implements ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties, IScriptable, ISfcSupportsDesignMode
DefaultConstraint 类型公开以下成员。
属性
名称 | 说明 | |
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CreateDate | Gets the date when the default constraint was created. |
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DateLastModified | Gets the date when the default constraint was last modified. |
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ExtendedProperties | Gets the extended properties of the default constraint. |
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ID | Gets the default constraint ID value. |
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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 default constraint was named by the system or the user. |
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Name | Gets or sets the default constraint name. (覆盖 NamedSmoObject.Name。) |
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Parent | Gets the Column object that is the parent of the DefaultConstraint object. |
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Properties | Gets a collection of Property objects that represent the object properties. (从 SqlSmoObject 继承。) |
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State | Gets the state of the referenced object. (从 SmoObjectBase 继承。) |
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Text | Gets or sets the Transact-SQL statement that defines the default constraint. |
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Urn | Gets the Uniform Resource Name (URN) address value that uniquely identifies the object. (从 SqlSmoObject 继承。) |
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UserData | Gets or sets user-defined data associated with the referenced object. (从 SmoObjectBase 继承。) |
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方法
名称 | 说明 | |
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Alter | Updates any DefaultConstraint object property changes on the instance of SQL Server. |
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Create | Creates a default constraint in the parent database as defined by the DefaultConstraint object. |
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Discover | Discovers a list of type Object. (从 SqlSmoObject 继承。) |
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Drop | Removes the default constraint. |
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Equals | (从 Object 继承。) |
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FormatSqlVariant | Formats an object as SqlVariant type. (从 SqlSmoObject 继承。) |
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GetContextDB | Gets the context database that is associated with this object. (从 SqlSmoObject 继承。) |
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GetDBName | Gets the database name that is associated with the object. (从 SqlSmoObject 继承。) |
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GetHashCode | (从 Object 继承。) |
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GetPropValue | Gets a property value of the SqlSmoObject object. (从 SqlSmoObject 继承。) |
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GetPropValueOptional | Gets a property value of the SqlSmoObject object. (从 SqlSmoObject 继承。) |
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GetPropValueOptionalAllowNull | Gets a property value of the SqlSmoObject object. (从 SqlSmoObject 继承。) |
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GetServerObject | Gets the server of the SqlSmoObject object. (从 SqlSmoObject 继承。) |
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GetType | (从 Object 继承。) |
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Initialize() | Initializes the object and forces the properties be loaded. (从 SqlSmoObject 继承。) |
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Initialize(Boolean) | Initializes the object and forces the properties be loaded. (从 SqlSmoObject 继承。) |
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IsObjectInitialized | Verifies whether the object has been initialized. (从 SqlSmoObject 继承。) |
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IsObjectInSpace | Verifies whether the object is isolated or connected to the instance of SQL Server. (从 SqlSmoObject 继承。) |
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Refresh | Refreshes the script name. (从 ScriptNameObjectBase 继承。) |
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Rename | Renames the default constraint. |
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Script() | Generates a Transact-SQL script that can be used to re-create the SQL Server default constraint. |
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Script(ScriptingOptions) | Generates a Transact-SQL script that can be used to re-create the SQL Server default constraint as specified by the scripting options. |
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SetParentImpl | Sets the parent of the SqlSmoObject to the newParent parameter. (从 SqlSmoObject 继承。) |
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ToString | Returns a String that represents the referenced object. (从 SqlSmoObject 继承。) |
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Validate | Validates the state of an object. (从 SmoObjectBase 继承。) |
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事件
名称 | 说明 | |
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PropertyChanged | Represents the event that occurs when a property is changed. (从 SqlSmoObject 继承。) |
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PropertyMetadataChanged | Represents the event that occurs when property metadata changes. (从 SqlSmoObject 继承。) |
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显式接口实现
名称 | 说明 | |
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IAlienObject.Discover | Discovers any dependencies. 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。) |
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IAlienObject.GetDomainRoot | Returns the root of the domain. (从 SqlSmoObject 继承。) |
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IAlienObject.GetParent | Gets the parent of this object. 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。) |
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IAlienObject.GetPropertyType | Gets the type of the specified property. (从 SqlSmoObject 继承。) |
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IAlienObject.GetPropertyValue | Gets the value of the specified property. (从 SqlSmoObject 继承。) |
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IAlienObject.GetUrn | Gets the Unified Resource Name (URN) of the object. 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。) |
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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. (从 SqlSmoObject 继承。) |
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IAlienObject.SetObjectState | Sets the object state to the specified SfcObjectState value. (从 SqlSmoObject 继承。) |
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IAlienObject.SetPropertyValue | Sets the property value. (从 SqlSmoObject 继承。) |
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ISfcPropertyProvider.GetPropertySet | Gets the interface reference to the set of properties of this object. (从 SqlSmoObject 继承。) |
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ISfcSupportsDesignMode.IsDesignMode | Gets a Boolean value that indicates whether the object supports design mode. |
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注释
To get DefaultConstraint object properties, users can be members of the public fixed server role.
To set DefaultConstraint 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 default constraint, users must have ALTER permission on the parent table 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。但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。
请参阅
参考
Microsoft.SqlServer.Management.Smo 命名空间