TaskUILifetimeHintAttribute 类

Defines a task lifetime attribute that specifies how expensive a user interface is to re-create.

继承层次结构

System.Object
  System.Attribute
    Microsoft.SqlServer.Dts.Runtime.Design.TaskUILifetimeHintAttribute

命名空间：  Microsoft.SqlServer.Dts.Runtime.Design
程序集：  Microsoft.SqlServer.Dts.Design（在 Microsoft.SqlServer.Dts.Design.dll 中）

语法

声明
<AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple := False)> _
Public NotInheritable Class TaskUILifetimeHintAttribute _
    Inherits Attribute
用法
Dim instance As TaskUILifetimeHintAttribute

[AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = false)]
public sealed class TaskUILifetimeHintAttribute : Attribute

[AttributeUsageAttribute(AttributeTargets::Class, AllowMultiple = false)]
public ref class TaskUILifetimeHintAttribute sealed : public Attribute

[<SealedAttribute>]
[<AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = false)>]
type TaskUILifetimeHintAttribute =  
    class 
        inherit Attribute 
    end

public final class TaskUILifetimeHintAttribute extends Attribute

TaskUILifetimeHintAttribute 类型公开以下成员。

构造函数

	名称	说明
	TaskUILifetimeHintAttribute	Initializes a new instance of the TaskUILifetimeHintAttribute class.

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属性

	名称	说明
	TaskUILifetimeHint	Provides an estimate, stored as a lifetime hint, about how expensive it is to re-create a user interface.
	TypeId	（从 Attribute 继承。）

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方法

	名称	说明
	Equals	（从 Attribute 继承。）
	GetHashCode	（从 Attribute 继承。）
	GetType	（从 Object 继承。）
	IsDefaultAttribute	（从 Attribute 继承。）
	Match	（从 Attribute 继承。）
	ToString	（从 Object 继承。）

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显式接口实现

	名称	说明
	_Attribute.GetIDsOfNames	（从 Attribute 继承。）
	_Attribute.GetTypeInfo	（从 Attribute 继承。）
	_Attribute.GetTypeInfoCount	（从 Attribute 继承。）
	_Attribute.Invoke	（从 Attribute 继承。）

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注释

In Integration Services, this attribute allows you to specify how expensive it is to recreate a specific user interface. For example, if a user interface displays a drop-down list with only five fields, all obtained from the local computer, the user interface may be fairly fast and inexpensive to process. However, if a drop-down list in a user interface contains information that was gathered from a remote server, or from across a network that was slow, the user interface may be expensive and time-consuming to re-create. To keep the user interface in memory until the package designer is closed, set the TaskUILifetimeHint property to RecreationExpensive. To dispose of the user interface as soon as the user closes the dialog, set the TaskUILifetimeHint property to RecreationInexpensive.

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.Dts.Runtime.Design 命名空间