BreakpointTargetEnumerator 클래스

Creates a BreakpointTargetEnumerator for the BreakpointTargets collection. This class cannot be inherited.

상속 계층

System.Object
  Microsoft.SqlServer.Dts.Runtime.DtsEnumerator
    Microsoft.SqlServer.Dts.Runtime.BreakpointTargetEnumerator

네임스페이스:  Microsoft.SqlServer.Dts.Runtime
어셈블리:  Microsoft.SqlServer.ManagedDTS(Microsoft.SqlServer.ManagedDTS.dll)

구문

‘선언
Public NotInheritable Class BreakpointTargetEnumerator _
    Inherits DtsEnumerator
‘사용 방법
Dim instance As BreakpointTargetEnumerator

public sealed class BreakpointTargetEnumerator : DtsEnumerator

public ref class BreakpointTargetEnumerator sealed : public DtsEnumerator

[<SealedAttribute>]
type BreakpointTargetEnumerator =  
    class 
        inherit DtsEnumerator 
    end

public final class BreakpointTargetEnumerator extends DtsEnumerator

BreakpointTargetEnumerator 유형에서 다음 멤버를 표시합니다.

속성

	이름	설명
	Current	Gets the current BreakpointTarget object in the collection.

맨 위로 이동

메서드

	이름	설명
	Equals	(Object에서 상속됨)
	GetHashCode	(Object에서 상속됨)
	GetType	(Object에서 상속됨)
	MoveNext	Advances the enumerator to the next element of the collection. (DtsEnumerator에서 상속됨)
	Reset	Sets the enumerator to its initial position, which is before the first element in the collection. (DtsEnumerator에서 상속됨)
	ToString	(Object에서 상속됨)

맨 위로 이동

주의

Enumerators only enable reading the data in the collection. Enumerators cannot be used to modify the underlying collection.

Initially, the enumerator is positioned before the first element in the collection. The Reset method also brings the enumerator back to this position. At this position, calling the Current property throws an exception. Therefore, you must call MoveNext method to advance the enumerator to the first element of the collection before reading the value of Current.

Current returns the same object until either MoveNext or Reset is called. MoveNext sets Current to the next element.

After the end of the collection is passed, the enumerator is positioned after the last element in the collection, and calling MoveNext returns false. If the last call to MoveNext returned false, calling Current throws an exception. To set Current to the first element of the collection again, you can call Reset followed by MoveNext.

An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding, modifying, or deleting elements, the enumerator is invalidated and becomes irrecoverable; thus the next call to MoveNext or Reset throws an InvalidOperationException. However, if the collection is modified between MoveNext and Current, Current will return the element that it is set to, even if the enumerator has been invalidated.

The enumerator does not have exclusive access to the collection; therefore, enumerating through a collection is not a thread-safe procedure. Even when a collection is synchronized, other threads could still modify the collection, which causes the enumerator to throw an exception. To guarantee thread safety during enumeration, you can either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.

스레드 보안

이 유형의 모든 공용 static(Visual Basic에서는 Shared) 멤버는 스레드로부터 안전합니다. 인스턴스 멤버는 스레드로부터의 안전성이 보장되지 않습니다.

참고 항목

참조

Microsoft.SqlServer.Dts.Runtime 네임스페이스