PrecedenceConstraints.Add(Executable, Executable) 메서드

참조

정의

네임스페이스:: Microsoft.SqlServer.Dts.Runtime

어셈블리:: Microsoft.SqlServer.ManagedDTS.dll

중요

일부 정보는 릴리스되기 전에 상당 부분 수정될 수 있는 시험판 제품과 관련이 있습니다. Microsoft는 여기에 제공된 정보에 대해 어떠한 명시적이거나 묵시적인 보증도 하지 않습니다.

Executable 컬렉션에 선행 제약 조건으로 지정된 PrecedenceConstraints을 추가합니다.

public:
 Microsoft::SqlServer::Dts::Runtime::PrecedenceConstraint ^ Add(Microsoft::SqlServer::Dts::Runtime::Executable ^ execFrom, Microsoft::SqlServer::Dts::Runtime::Executable ^ execTo);

public Microsoft.SqlServer.Dts.Runtime.PrecedenceConstraint Add (Microsoft.SqlServer.Dts.Runtime.Executable execFrom, Microsoft.SqlServer.Dts.Runtime.Executable execTo);

member this.Add : Microsoft.SqlServer.Dts.Runtime.Executable * Microsoft.SqlServer.Dts.Runtime.Executable -> Microsoft.SqlServer.Dts.Runtime.PrecedenceConstraint

Public Function Add (execFrom As Executable, execTo As Executable) As PrecedenceConstraint

매개 변수

execFrom: Executable

선행 제약 조건 앞의 실행 파일입니다.

execTo: Executable

선행 제약 조건 뒤의 실행 파일입니다.

반환

PrecedenceConstraint

PrecedenceConstraint 개체

예제

다음 코드 예제에서는 세 개의 태스크를 만들고 둘 사이에 우선 순위 제약 조건을 배치합니다. PrecedenceConstraints 컬렉션을 사용하여 패키지의 제약 조건을 반복하여 각 제약 조건에 대한 정보를 인쇄합니다.

using System;  
using System.Collections.Generic;  
using System.Text;  
using Microsoft.SqlServer.Dts.Runtime;  

namespace PrecedenceConst  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            Package pkg = new Package();  
            // Add a File System task.  
            Executable eFileTask1 = pkg.Executables.Add("STOCK:FileSystemTask");  
            TaskHost thFileTask1 = eFileTask1 as TaskHost;  

            // Add a second File System task.  
            Executable eFileTask2 = pkg.Executables.Add("STOCK:FileSystemTask");  
            TaskHost thFileTask2 = eFileTask2 as TaskHost;  

            // Add a Bulk Insert task.  
            Executable eBulkInsert = pkg.Executables.Add("STOCK:BulkInsertTask");  
            TaskHost thBulkInsert = eBulkInsert as TaskHost;  

            // Add a precedence constraint between eFileTask1 and eFileTask2.  
            // Set the constraint to be that eFileTask2 cannot run   
            // until eFileTask1 completes.  
            PrecedenceConstraint pcFileTasks = pkg.PrecedenceConstraints.Add(eFileTask1, eFileTask2);  

            // Add another precedence constraint. Add it between eFileTask2 and BulkInsert.  
            // Again, set the constraint to be that BulkInsert cannot run   
            // until eFileTask2 completes.  
            PrecedenceConstraint pcFiletoBulk = pkg.PrecedenceConstraints.Add(eFileTask2, eBulkInsert);  

            // Obtain the precedence constraint collection, and display properties.  
            // Some properties are read/write and have not been set.  
            PrecedenceConstraints pConsts = pkg.PrecedenceConstraints;  
            foreach (PrecedenceConstraint pc in pConsts)  
            {  
                Console.WriteLine("Constrained container  {0}", pc.ConstrainedExecutable);  
                Console.WriteLine("Creation Name          {0}", pc.CreationName);  
                Console.WriteLine("Description            {0}", pc.Description);  
                Console.WriteLine("Evaluation operation   {0}", pc.EvalOp);  
                Console.WriteLine("Evaluates true         {0}", pc.EvaluatesTrue);  
                Console.WriteLine("Expression             {0}", pc.Expression);  
                Console.WriteLine("ID                     {0}", pc.ID);  
                Console.WriteLine("LogicalAnd             {0}", pc.LogicalAnd);  
                Console.WriteLine("Name                   {0}", pc.Name);  
                Console.WriteLine("Precedence Executable  {0}", pc.PrecedenceExecutable);  
                Console.WriteLine("Value                  {0}", pc.Value);  
                Console.WriteLine("-----------------------------------");  
            }  
        }  
    }  
}

Imports System  
Imports System.Collections.Generic  
Imports System.Text  
Imports Microsoft.SqlServer.Dts.Runtime  

Namespace PrecedenceConst  
    Class Program  
        Shared  Sub Main(ByVal args() As String)  
            Dim pkg As Package =  New Package()   
            ' Add a File System task.  
            Dim eFileTask1 As Executable =  pkg.Executables.Add("STOCK:FileSystemTask")   
            Dim thFileTask1 As TaskHost =  eFileTask1 as TaskHost   

            ' Add a second File System task.  
            Dim eFileTask2 As Executable =  pkg.Executables.Add("STOCK:FileSystemTask")   
            Dim thFileTask2 As TaskHost =  eFileTask2 as TaskHost   

            ' Add a Bulk Insert task.  
            Dim eBulkInsert As Executable =  pkg.Executables.Add("STOCK:BulkInsertTask")   
            Dim thBulkInsert As TaskHost =  eBulkInsert as TaskHost   

            ' Add a precedence constraint between eFileTask1 and eFileTask2.  
            ' Set the constraint to be that eFileTask2 cannot run   
            ' until eFileTask1 completes.  
            Dim pcFileTasks As PrecedenceConstraint =  pkg.PrecedenceConstraints.Add(eFileTask1,eFileTask2)   

            ' Add another precedence constraint. Add it between eFileTask2 and BulkInsert.  
            ' Again, set the constraint to be that BulkInsert cannot run   
            ' until eFileTask2 completes.  
            Dim pcFiletoBulk As PrecedenceConstraint =  pkg.PrecedenceConstraints.Add(eFileTask2,eBulkInsert)   

            ' Obtain the precedence constraint collection, and display properties.  
            ' Some properties are read/write and have not been set.  
            Dim pConsts As PrecedenceConstraints =  pkg.PrecedenceConstraints   
            Dim pc As PrecedenceConstraint  
            For Each pc In pConsts  
                Console.WriteLine("Constrained container  {0}", pc.ConstrainedExecutable)  
                Console.WriteLine("Creation Name          {0}", pc.CreationName)  
                Console.WriteLine("Description            {0}", pc.Description)  
                Console.WriteLine("Evaluation operation   {0}", pc.EvalOp)  
                Console.WriteLine("Evaluates true         {0}", pc.EvaluatesTrue)  
                Console.WriteLine("Expression             {0}", pc.Expression)  
                Console.WriteLine("ID                     {0}", pc.ID)  
                Console.WriteLine("LogicalAnd             {0}", pc.LogicalAnd)  
                Console.WriteLine("Name                   {0}", pc.Name)  
                Console.WriteLine("Precedence Executable  {0}", pc.PrecedenceExecutable)  
                Console.WriteLine("Value                  {0}", pc.Value)  
                Console.WriteLine("-----------------------------------")  
            Next  
        End Sub  
    End Class  
End Namespace

샘플 출력:

제한된 컨테이너 Microsoft.SqlServer.Dts.Runtime.TaskHost

만들기 이름

설명

평가 작업 제약 조건

true True를 평가합니다.

식

ID {BA20A288-545D-4E48-864A-E6AF6C3B9AEE}

LogicalAnd True

이름 {BA20A288-545D-4E48-864A-E6AF6C3B9AEE}

선행 실행 파일 Microsoft.SqlServer.Dts.Runtime.TaskHost

값 성공

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