Column 类

The Column object represents a SQL Server column.

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..::..Column

命名空间：  Microsoft.SqlServer.Management.Smo
程序集：  Microsoft.SqlServer.Smo（在 Microsoft.SqlServer.Smo.dll 中）

语法

声明
Public NotInheritable Class Column _
    Inherits ScriptNameObjectBase _
    Implements ICreatable, IAlterable, IDroppable, IMarkForDrop,  _
    IExtendedProperties, IRenamable
用法
Dim instance As Column

public sealed class Column : ScriptNameObjectBase, 
    ICreatable, IAlterable, IDroppable, IMarkForDrop, IExtendedProperties, 
    IRenamable

public ref class Column sealed : public ScriptNameObjectBase, 
    ICreatable, IAlterable, IDroppable, IMarkForDrop, IExtendedProperties, 
    IRenamable

[<SealedAttribute>]
type Column =  
    class
        inherit ScriptNameObjectBase
        interface ICreatable
        interface IAlterable
        interface IDroppable
        interface IMarkForDrop
        interface IExtendedProperties
        interface IRenamable
    end

public final class Column extends ScriptNameObjectBase implements ICreatable, IAlterable, IDroppable, IMarkForDrop, IExtendedProperties, IRenamable

Column 类型公开以下成员。

构造函数

	名称	说明
	Column() () () ()	Initializes a new instance of the Column class.
	Column(SqlSmoObject, String)	Initializes a new instance of the Column class that has the specified parent and specified name.
	Column(SqlSmoObject, String, DataType)	Initializes a new instance of the Column class that has the specified parent and specified name.
	Column(SqlSmoObject, String, DataType, Boolean)	Initializes a new instance of the Column class that uses the specified parent, datayype, and optionally adding the FILESTREAM attribute.

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属性

	名称	说明
	AnsiPaddingStatus	Gets or sets a Boolean property value that specifies whether the ANSI_PADDING_ENABLED column option is active.
	Collation	Gets or sets the default collation that is used by the column.
	Computed	Gets the Boolean property value that specifies whether the column is the product of computed expression
	ComputedText	Gets or sets the Transact-SQL expression that is used to generate the value of a computed column
	DataType	Gets or sets the data type that is assigned to the column.
	Default	Gets the default bound to the column.
	DefaultConstraint	Gets or sets a default value for the column.
	DefaultSchema	Gets or sets the default schema that is bound to the column.
	ExecuteForScalar	Gets or sets the Boolean property value that specifies whether the object is set to the execute for scalar option. （从 SqlSmoObject 继承。）
	ExtendedProperties	Represents a collection of ExtendedProperty objects. Each ExtendedProperty object represents an extended property for the Column object.
	ID	Gets the column ID that uniquely identifies the column.
	Identity	Gets or sets the Boolean property value that specifies whether the column is an identity column.
	IdentityIncrement	Gets or sets the identity increment for an identity column.
	IdentitySeed	Gets or sets the identity seed for an identity column.
	InPrimaryKey	Gets the Boolean property value that specifies whether the column is included in the definition of a primary key or unique key constraint.
	IsColumnSet	Gets or sets the Boolean property value that specifies whether the column has been set.
	IsDeterministic	Gets or sets the Boolean property value that specifies whether the value of a computed column can change in subsequent invocations.
	IsFileStream	Gets a boolean value that represents the FILESTREAM attribute of the column.
	IsForeignKey	Gets the Boolean property value that specifies whether the column is a foreign key.
	IsFullTextIndexed	Gets the Boolean property value that specifies whether the column participates in a full-text index.
	IsPersisted	Gets the Boolean property value that specifies whether the computed value of the Column object is saved with the data, thus avoiding a computation each time the column is accessed.
	IsPrecise	Gets or sets the Boolean property value that specifies whether a computed column is a precise value.
	IsSparse	Gets or sets the Boolean property value that specifies whether the column value is sparse.
	IsTouched	Gets the Boolean property value that specifies whether the object properties have been updated but not yet persisted on the server. （从 SqlSmoObject 继承。）
	Name	Gets or sets the name of the object. （从 NamedSmoObject 继承。）
	NotForReplication	Gets the Boolean property value that specifies whether the column is participating in replication.
	Nullable	Gets or sets the Boolean property value that specifies whether the column can accept null values.
	ObjectInSpace	Gets the Boolean property value that specifies whether the object exists in isolation, or whether it is directly or indirectly connected to the instance of SQL Server. （从 SqlSmoObject 继承。）
	Parent	Gets the SqlSmoObject object that is the parent of the Column object.
	Properties	Gets a collection of Property objects that represent the object properties. （从 SqlSmoObject 继承。）
	RowGuidCol	Gets or sets the Boolean property value that specifies whether the column is automatically updated with a unique GUID value.
	Rule	Gets or sets the rule that is bound to the column.
	RuleSchema	Gets or sets the rule schema that is bound to the column.
	ScalarResult	Gets the scalar result for the referenced object. （从 SqlSmoObject 继承。）
	State	Gets the state of the referenced object. （从 SmoObjectBase 继承。）
	Urn	Gets the Uniform Resource Name (URN) address value that uniquely identifies the object. （从 SqlSmoObject 继承。）
	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
	AddDatabaseContext	（从 SqlSmoObject 继承。）
	AddDefaultConstraint() () () ()	Adds a default constraint to the column.
	AddDefaultConstraint(String)	Adds a default constraint to the column.
	Alter	Updates any Column object property changes on the instance of SQL Server.
	AlterImpl	（从 SqlSmoObject 继承。）
	AlterImplFinish	（从 SqlSmoObject 继承。）
	AlterImplInit	（从 SqlSmoObject 继承。）
	AlterImplWorker	（从 SqlSmoObject 继承。）
	AppendCommaText	（从 ScriptNameObjectBase 继承。）
	AppendWithCommaText	（从 ScriptNameObjectBase 继承。）
	AppendWithOption	（从 ScriptNameObjectBase 继承。）
	BindDefault	Binds a default to the column.
	BindDefaultImpl	（从 SqlSmoObject 继承。）
	BindRule	Binds a rule to the column.
	BindRuleImpl	（从 SqlSmoObject 继承。）
	CheckCollation	（从 SqlSmoObject 继承。）
	CheckObjectDirty	（从 ScriptNameObjectBase 继承。）
	CheckObjectState() () () ()	Validates the state of the referenced object. （从 SqlSmoObject 继承。）
	CheckObjectState(Boolean)	Validates the state of the referenced object with the option to specify that an exception is thrown if the object is not yet created. （从 SqlSmoObject 继承。）
	CheckObjectStateImpl	（从 SqlSmoObject 继承。）
	CheckTextCorectness	（从 ScriptNameObjectBase 继承。）
	CheckTextModeSupport	（从 ScriptNameObjectBase 继承。）
	CheckVersion100	（从 SqlSmoObject 继承。）
	CheckVersion80	Checks the validity of the object on SQL Server 2000. （从 SqlSmoObject 继承。）
	CheckVersion80SP3	Checks the validity of the object on SQL Server 2000 SP3. （从 SqlSmoObject 继承。）
	CheckVersion90	Check the validity of the object on SQL Server 2005. （从 SqlSmoObject 继承。）
	CheckVersionBelow90	（从 SqlSmoObject 继承。）
	CleanObject	Cleans the referenced object. （从 ScriptNameObjectBase 继承。）
	Create	Creates a column on the instance of Microsoft SQL Server as defined by the Column object.
	CreateImpl	（从 SqlSmoObject 继承。）
	CreateImplFinish	（从 SqlSmoObject 继承。）
	CreateImplInit	（从 SqlSmoObject 继承。）
	Discover	（从 SqlSmoObject 继承。）
	Drop	Drops the column.
	DropImpl	（从 SqlSmoObject 继承。）
	DropImplWorker	（从 SqlSmoObject 继承。）
	EnumForeignKeys	Enumerates a list of foreign keys that reference the column.
	EnumIndexes	Enumerates a list of indexes that include the column.
	EnumScriptImpl	（从 SqlSmoObject 继承。）
	EnumScriptImplWorker	（从 SqlSmoObject 继承。）
	EnumUserPermissions	Enumerates a list of permissions for a specified user.
	Equals	（从 Object 继承。）
	Finalize	（从 Object 继承。）
	ForceTextModeOnTextBody	Enforces text mode on the text body. （从 ScriptNameObjectBase 继承。）
	FormatSqlVariant	（从 SqlSmoObject 继承。）
	GenerateDataSpaceFileStreamScript	（从 SqlSmoObject 继承。）
	GenerateDataSpaceScript	（从 SqlSmoObject 继承。）
	GetBindDefaultScript	（从 SqlSmoObject 继承。）
	GetBindRuleScript	（从 SqlSmoObject 继承。）
	GetBoolParameter(StringBuilder, ScriptingOptions, String, String, Int32%)	（从 SqlSmoObject 继承。）
	GetBoolParameter(StringBuilder, ScriptingOptions, String, String, Int32%, Boolean)	（从 SqlSmoObject 继承。）
	GetBraketNameForText	（从 ScriptNameObjectBase 继承。）
	GetDateTimeParameter	（从 SqlSmoObject 继承。）
	GetDateTimeParameterAsInt	（从 SqlSmoObject 继承。）
	GetDBName	Gets the database name that is associated with the object. （从 SqlSmoObject 继承。）
	GetEnumParameter	（从 SqlSmoObject 继承。）
	GetFragOptionString	（从 SqlSmoObject 继承。）
	GetGuidParameter	（从 SqlSmoObject 继承。）
	GetHashCode	（从 Object 继承。）
	GetIsTextDirty	Determines whether the text value is consistent with stored value. （从 ScriptNameObjectBase 继承。）
	GetParameter(StringBuilder, ScriptingOptions, String, String, Int32%)	（从 SqlSmoObject 继承。）
	GetParameter(StringBuilder, ScriptingOptions, String, String, Int32%, Boolean)	（从 SqlSmoObject 继承。）
	GetPropValue	（从 SqlSmoObject 继承。）
	GetPropValueOptional	（从 SqlSmoObject 继承。）
	GetPropValueOptionalAllowNull	（从 SqlSmoObject 继承。）
	GetRealValue	（从 SqlSmoObject 继承。）
	GetScriptIncludeExists	（从 ScriptNameObjectBase 继承。）
	GetScriptingOptionsForCreate	（从 SqlSmoObject 继承。）
	GetServerName	Gets the name of the instance of SQL Server with which the object is associated. （从 SqlSmoObject 继承。）
	GetServerObject	（从 SqlSmoObject 继承。）
	GetSqlServerVersionName	Gets the version name of the instance of SQL Server with which the object is associated. （从 SqlSmoObject 继承。）
	GetStringParameter(StringBuilder, ScriptingOptions, String, String, Int32%)	（从 SqlSmoObject 继承。）
	GetStringParameter(StringBuilder, ScriptingOptions, String, String, Int32%, Boolean)	（从 SqlSmoObject 继承。）
	GetTextBody() () () ()	Returns the text body. （从 ScriptNameObjectBase 继承。）
	GetTextBody(Boolean)	Returns the text body. （从 ScriptNameObjectBase 继承。）
	GetTextForScript(ScriptingOptions, Boolean, array<String> [] () [] [])	Gets the text for scripting. （从 ScriptNameObjectBase 继承。）
	GetTextForScript(ScriptingOptions, Boolean, array<String> [] () [] [], Boolean)	（从 ScriptNameObjectBase 继承。）
	GetTextHeader	Returns the text header. （从 ScriptNameObjectBase 继承。）
	GetTextMode	Determines whether the script name is using text mode. （从 ScriptNameObjectBase 继承。）
	GetTextProperty(String)	（从 ScriptNameObjectBase 继承。）
	GetTextProperty(String, ScriptingOptions)	（从 ScriptNameObjectBase 继承。）
	GetTimeSpanParameterAsInt	（从 SqlSmoObject 继承。）
	GetType	（从 Object 继承。）
	GetUrnRecursive(StringBuilder)	（从 SqlSmoObject 继承。）
	GetUrnRecursive(StringBuilder, UrnIdOption)	（从 SqlSmoObject 继承。）
	ImplInitialize	（从 SqlSmoObject 继承。）
	Initialize() () () ()	Initializes the object and forces the properties be loaded. （从 SqlSmoObject 继承。）
	Initialize(Boolean)	Initializes the object and forces the properties be loaded. （从 SqlSmoObject 继承。）
	IsObjectDirty	Determines whether the referenced object is consistent with the stored object. （从 ScriptNameObjectBase 继承。）
	IsObjectInitialized	Verifies whether the object has been initialized. （从 SqlSmoObject 继承。）
	IsObjectInSpace	Verifies whether the object is isolated or connected to the instance of SQL Server. （从 SqlSmoObject 继承。）
	IsVersion80SP3	（从 SqlSmoObject 继承。）
	MarkDropped	（从 SqlSmoObject 继承。）
	MarkForDrop	Marks the column to be dropped when the Alter method is run on the column's parent Table object.
	MarkForDropImpl	（从 SqlSmoObject 继承。）
	MemberwiseClone	（从 Object 继承。）
	PostAlter	（从 SqlSmoObject 继承。）
	PostCreate	（从 SqlSmoObject 继承。）
	PostDrop	（从 SqlSmoObject 继承。）
	Refresh	Refreshes the Column object properties. （覆盖 ScriptNameObjectBase. . :: . .Refresh() () () ()。）
	Rename	Renames the column.
	RenameImpl	This method supports the SMO infrastructure and is not intended to be used directly from your code. （从 NamedSmoObject 继承。）
	RenameImplWorker	This method supports the SMO infrastructure and is not intended to be used directly from your code. （从 NamedSmoObject 继承。）
	ScriptAlter	（从 SqlSmoObject 继承。）
	ScriptAnsiQI	（从 ScriptNameObjectBase 继承。）
	ScriptChangeOwner	This method supports the SMO infrastructure and is not intended to be used directly from your code. （从 NamedSmoObject 继承。）
	ScriptCreate	（从 SqlSmoObject 继承。）
	ScriptDdl	（从 SqlSmoObject 继承。）
	ScriptDrop	（从 SqlSmoObject 继承。）
	ScriptImpl() () () ()	（从 SqlSmoObject 继承。）
	ScriptImpl(ScriptingOptions)	（从 SqlSmoObject 继承。）
	ScriptImplWorker	（从 SqlSmoObject 继承。）
	ScriptInformativeHeaders	（从 ScriptNameObjectBase 继承。）
	ScriptRename	This method supports the SMO infrastructure and is not intended to be used directly from your code. （从 NamedSmoObject 继承。）
	SetCollectionTextMode	Sets the collection text mode. （从 ScriptNameObjectBase 继承。）
	SetParentImpl	（从 SqlSmoObject 继承。）
	SetTextBody	Specifies the text body. （从 ScriptNameObjectBase 继承。）
	SetTextHeader	Specifies the text header. （从 ScriptNameObjectBase 继承。）
	SetTextMode	Specifies the text mode. （从 ScriptNameObjectBase 继承。）
	SwitchTextMode	Switches the text mode. （从 ScriptNameObjectBase 继承。）
	ThrowIfTextIsDirtyForAlter	（从 ScriptNameObjectBase 继承。）
	ToString	Returns a String that represents the referenced object. （从 SqlSmoObject 继承。）
	TouchImpl	（从 SqlSmoObject 继承。）
	UnbindDefault	Unbinds the currently bound default from the column.
	UnbindDefaultImpl	（从 SqlSmoObject 继承。）
	UnbindRule	Unbinds the currently bound rule from the column.
	UnbindRuleImpl	（从 SqlSmoObject 继承。）
	UpdateStatistics() () () ()	Updates Statistic objects that monitor this column.
	UpdateStatistics(StatisticsScanType)	Updates Statistic objects that monitor this column.
	UpdateStatistics(StatisticsScanType, Int32)	Updates Statistic objects that monitor this column using a sampled scan.
	UpdateStatistics(StatisticsScanType, Int32, Boolean)	Updates Statistic objects that monitor this column using a sampled scan.
	Validate	（从 SmoObjectBase 继承。）

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事件

	名称	说明
	PropertyChanged	（从 SqlSmoObject 继承。）
	PropertyMetadataChanged	（从 SqlSmoObject 继承。）

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字段

	名称	说明
	m_ExtendedProperties	（从 SqlSmoObject 继承。）

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显式接口实现

	名称	说明
	IAlienObjectDiscover	（从 SqlSmoObject 继承。）
	IAlienObjectGetParent	（从 SqlSmoObject 继承。）
	IAlienObjectGetProperty	（从 SqlSmoObject 继承。）
	ISfcPropertyProviderGetPropertySet	（从 SqlSmoObject 继承。）
	IAlienObjectGetUrn	（从 SqlSmoObject 继承。）
	IAlienObjectResolve	（从 SqlSmoObject 继承。）
	IAlienObjectSetProperty	（从 SqlSmoObject 继承。）

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注释

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

To do any of the following, users must have ALTER permission on the parent table, or be a member of the db_owner fixed database role:

• Set Column object properties and run the Alter method

• Create a column

• Drop a column

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对于线程安全的。

示例

使用数据库对象

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

CREATE TABLE (Transact-SQL)