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
公共属性 CreateDate Gets the date when the default constraint was created.
公共属性 DateLastModified Gets the date when the default constraint was last modified.
公共属性 ExtendedProperties Gets the extended properties of the default constraint.
公共属性 ID Gets the default constraint ID value.
公共属性 IsFileTableDefined Gets or sets whether the file table is defined.
公共属性 IsSystemNamed Gets the Boolean property value that specifies whether the default constraint was named by the system or the user.
公共属性 Name Gets or sets the default constraint name. (覆盖 NamedSmoObject.Name。)
公共属性 Parent Gets the Column object that is the parent of the DefaultConstraint object.
公共属性 Properties Gets a collection of Property objects that represent the object properties. (从 SqlSmoObject 继承。)
公共属性 State Gets the state of the referenced object. (从 SmoObjectBase 继承。)
公共属性 Text Gets or sets the Transact-SQL statement that defines the default constraint.
公共属性 Urn Gets the Uniform Resource Name (URN) address value that uniquely identifies the object. (从 SqlSmoObject 继承。)
公共属性 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
公共方法 Alter Updates any DefaultConstraint object property changes on the instance of SQL Server.
公共方法 Create Creates a default constraint in the parent database as defined by the DefaultConstraint object.
公共方法 Discover Discovers a list of type Object. (从 SqlSmoObject 继承。)
公共方法 Drop Removes the default constraint.
公共方法 Equals (从 Object 继承。)
受保护方法 FormatSqlVariant Formats an object as SqlVariant type. (从 SqlSmoObject 继承。)
受保护方法 GetContextDB Gets the context database that is associated with this object. (从 SqlSmoObject 继承。)
受保护方法 GetDBName Gets the database name that is associated with the object. (从 SqlSmoObject 继承。)
公共方法 GetHashCode (从 Object 继承。)
受保护方法 GetPropValue Gets a property value of the SqlSmoObject object. (从 SqlSmoObject 继承。)
受保护方法 GetPropValueOptional Gets a property value of the SqlSmoObject object. (从 SqlSmoObject 继承。)
受保护方法 GetPropValueOptionalAllowNull Gets a property value of the SqlSmoObject object. (从 SqlSmoObject 继承。)
受保护方法 GetServerObject Gets the server of the SqlSmoObject object. (从 SqlSmoObject 继承。)
公共方法 GetType (从 Object 继承。)
公共方法 Initialize() Initializes the object and forces the properties be loaded. (从 SqlSmoObject 继承。)
公共方法 Initialize(Boolean) Initializes the object and forces the properties be loaded. (从 SqlSmoObject 继承。)
受保护方法 IsObjectInitialized Verifies whether the object has been initialized. (从 SqlSmoObject 继承。)
受保护方法 IsObjectInSpace Verifies whether the object is isolated or connected to the instance of SQL Server. (从 SqlSmoObject 继承。)
公共方法 Refresh Refreshes the script name. (从 ScriptNameObjectBase 继承。)
公共方法 Rename Renames the default constraint.
公共方法 Script() Generates a Transact-SQL script that can be used to re-create the SQL Server default constraint.
公共方法 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.
受保护方法 SetParentImpl Sets the parent of the SqlSmoObject to the newParent parameter. (从 SqlSmoObject 继承。)
公共方法 ToString Returns a String that represents the referenced object. (从 SqlSmoObject 继承。)
公共方法 Validate Validates the state of an object. (从 SmoObjectBase 继承。)

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事件

  名称 说明
公共事件 PropertyChanged Represents the event that occurs when a property is changed. (从 SqlSmoObject 继承。)
公共事件 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
显式接口实现私有方法 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。)
显式接口实现私有方法 IAlienObject.GetDomainRoot Returns the root of the domain. (从 SqlSmoObject 继承。)
显式接口实现私有方法 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。)
显式接口实现私有方法 IAlienObject.GetPropertyType Gets the type of the specified property. (从 SqlSmoObject 继承。)
显式接口实现私有方法 IAlienObject.GetPropertyValue Gets the value of the specified property. (从 SqlSmoObject 继承。)
显式接口实现私有方法 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。)
显式接口实现私有方法 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。)
显式接口实现私有方法 IAlienObject.SetObjectState Sets the object state to the specified SfcObjectState value. (从 SqlSmoObject 继承。)
显式接口实现私有方法 IAlienObject.SetPropertyValue Sets the property value. (从 SqlSmoObject 继承。)
显式接口实现私有方法 ISfcPropertyProvider.GetPropertySet Gets the interface reference to the set of properties of this object. (从 SqlSmoObject 继承。)
显式接口实现私有属性 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

其他资源

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