PrecedenceConstraint 類別

Specifies the properties for configuring a precedence constraint between two containers. This class cannot be inherited.

繼承階層

System. . :: . .Object
  Microsoft.SqlServer.Dts.Runtime. . :: . .DtsObject
    Microsoft.SqlServer.Dts.Runtime..::..PrecedenceConstraint

命名空間：  Microsoft.SqlServer.Dts.Runtime
組件：  Microsoft.SqlServer.ManagedDTS (在 Microsoft.SqlServer.ManagedDTS.dll 中)

語法

'宣告
Public NotInheritable Class PrecedenceConstraint _
    Inherits DtsObject _
    Implements IDTSName, IDTSPersist, IComponent, IDisposable
'用途
Dim instance As PrecedenceConstraint

public sealed class PrecedenceConstraint : DtsObject, 
    IDTSName, IDTSPersist, IComponent, IDisposable

public ref class PrecedenceConstraint sealed : public DtsObject, 
    IDTSName, IDTSPersist, IComponent, IDisposable

[<SealedAttribute>]
type PrecedenceConstraint =  
    class
        inherit DtsObject
        interface IDTSName
        interface IDTSPersist
        interface IComponent
        interface IDisposable
    end

public final class PrecedenceConstraint extends DtsObject implements IDTSName, IDTSPersist, IComponent, IDisposable

PrecedenceConstraint 型別公開下列成員。

屬性

	名稱	說明
	ConstrainedExecutable	Returns the name of a constrained container. This property is read-only.
	CreationName	Returns the string used by the Integration Services runtime to create an instance of the PrecedenceConstraint object and add the object to the PrecedenceConstraints collection. This property is read-only.
	Description	Gets or sets a description for the constraint.
	EvalOp	Gets or sets the evaluation operations used by the precedence constraint.
	EvaluatesTrue	Returns the Boolean value of the Value property. This property is read-only.
	Expression	Gets or sets the expression that the precedence constraint uses if EvalOp is set to Expression, ExpressionAndConstraint, or ExpressionOrConstraint.
	ID	Returns the GUID of the precedence constraint. This property is read-only.
	LogicalAnd	Gets or sets a Boolean that indicates whether multiple constraints work together.
	Name	Gets or sets the unique name of the precedence constraint.
	PrecedenceExecutable	Returns the name of the precedence executable. This property is read-only.
	Site	基礎結構。
	Value	Gets or sets the constraint type of Success, Failure, or Completion.

上層

方法

	名稱	說明
	Dispose	This method is inherited from the IDisposable.Dispose method, which is a generic mechanism to explicitly tell an object to perform cleanup.
	Equals	Determines whether two object instances are equal. (繼承自 DtsObject。)
	Finalize	(繼承自 Object。)
	GetHashCode	Returns the hash code for this instance. (繼承自 DtsObject。)
	GetType	(繼承自 Object。)
	LoadFromXML	This method is not callable by your application code. To load a package containing precedence constraints that are saved as .xml, use the Application..::..LoadPackage method.
	MemberwiseClone	(繼承自 Object。)
	SaveToXML	This method is not callable by your application code. To save a package as .xml, use the Application..::..SaveToXml method.
	ToString	(繼承自 Object。)

上層

事件

	名稱	說明
	Disposed	Adds an event handler to listen to the Disposed event on the precedence constraint.

上層

備註

You can specify the precedence and constrained executables that the precedence constraint connects, the expression and constraint that determine whether the constrained executable runs, and whether the precedence constraint works in concert with other precedence constraints.

執行緒安全性

這個型別的任何公用 static (在 Visual Basic 中為 Shared) 成員都是執行緒安全的。並不是所有的執行個體成員都保證可以用於所有的執行緒。

請參閱

參考

Microsoft.SqlServer.Dts.Runtime 命名空間