PrecedenceConstraints.Add(Executable, Executable) メソッド
定義
重要
一部の情報は、リリース前に大きく変更される可能性があるプレリリースされた製品に関するものです。 Microsoft は、ここに記載されている情報について、明示または黙示を問わず、一切保証しません。
優先順位制約として指定された Executable を PrecedenceConstraints コレクションに追加します。
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.PrecedenceConstraintPublic Function Add (execFrom As Executable, execTo As Executable) As PrecedenceConstraintパラメーター
- execFrom
- Executable
優先順位制約の前の実行可能ファイルです。
- execTo
- Executable
優先順位制約の後の実行可能ファイルです。
戻り値
PrecedenceConstraint オブジェクト。
例
次のコード例では、3 つのタスクを作成し、これらの間に優先順位制約を配置します。 PrecedenceConstraints コレクションを使用して、パッケージ内の制約に対して繰り返し処理を実行し、各制約に関する情報を出力します。
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
サンプル出力:
制約付きコンテナー Microsoft.SqlServer.Dts.Runtime.TaskHost
Creation Name
説明
評価操作の制約
True を評価します。
式
ID {BA20A288-545D-4E48-864A-E6AF6C3B9AEE}
LogicalAnd True
名前 {BA20A288-545D-4E48-864A-E6AF6C3B9AEE}
優先順位実行可能ファイル Microsoft.SqlServer.Dts.Runtime.TaskHost
値の成功
-----------------------------------
制約付きコンテナー Microsoft.SqlServer.Dts.Runtime.TaskHost
Creation Name
説明
評価操作の制約
True を評価します。
式
ID {E8DBC95E-AF27-45D7-B961-17E908CC4530}
LogicalAnd True
名前 {E8DBC95E-AF27-45D7-B961-17E908CC4530}
優先順位実行可能ファイル Microsoft.SqlServer.Dts.Runtime.TaskHost
値の成功
-----------------------------------