Executables 属性
Returns a collection of executable objects processed by the run-time engine during execution of this Sequence container. This property is read-only.
命名空间： Microsoft.SqlServer.Dts.Runtime
程序集： Microsoft.SqlServer.ManagedDTS（在 Microsoft.SqlServer.ManagedDTS.dll 中）
语法
声明
Public ReadOnly Property Executables As Executables
Get
用法
Dim instance As Sequence
Dim value As Executables
value = instance.Executables
public Executables Executables { get; }
public:
virtual property Executables^ Executables {
Executables^ get () sealed;
}
abstract Executables : Executables
override Executables : Executables
final function get Executables () : Executables
属性值
类型：Microsoft.SqlServer.Dts.Runtime. . :: . .Executables
An Executables collection that contains Executable objects.
实现
示例
The following code example creates a Sequence object, and creates three tasks, placing precedence constraints between them. Using the Executables collection, it shows the number of executables contained by the Sequence container.
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
using Microsoft.SqlServer.Dts.Tasks. FileSystemTask;
namespace Sequence_API
{
class Program
{
static void Main(string[] args)
{
Package package = new Package();
Sequence seq = (Sequence)package.Executables.Add("STOCK:SEQUENCE");
// Add a File System task.
Executable eFileTask1 = seq.Executables.Add("STOCK:FileSystemTask");
TaskHost thFileTask1 = eFileTask1 as TaskHost;
// Add a second File System task.
Executable eFileTask2 = seq.Executables.Add("STOCK:FileSystemTask");
TaskHost thFileTask2 = eFileTask2 as TaskHost;
// Add a Bulk Insert task.
Executable eBulkInsert = seq.Executables.Add("STOCK:BulkInsertTask");
TaskHost thBulkInsert = eBulkInsert as TaskHost;
// Add a precedence contraint between eFileTask1 and eFileTask2.
// Set the constraint to be that eFileTask2 cannot run
// until eFileTask1 completes.
PrecedenceConstraint pcFileTasks = seq.PrecedenceConstraints.Add(eFileTask1, eFileTask2);
// Add another precedence contraint. Add it between eFileTask2 and BulkInsert.
// Again, set the constraint to be that BulkInsert cannot run
// until eFileTask2 completes.
PrecedenceConstraint pcFiletoBulk = seq.PrecedenceConstraints.Add(eFileTask2, eBulkInsert);
// Obtain the precedence constraint collection, and display properties.
// Some properties are read/write and have not been set.
PrecedenceConstraints seqPCs = seq.PrecedenceConstraints;
int numPCs = seqPCs.Count;
Console.WriteLine("Number of precedence constraints in Sequence: {0}", numPCs);
Console.WriteLine("----------------------------------------");
foreach (PrecedenceConstraint pc in seqPCs)
{
Console.WriteLine("Constrained container {0}", pc.ConstrainedExecutable);
Console.WriteLine("Description {0}", pc.Description);
Console.WriteLine("Evaluation operation {0}", pc.EvalOp);
Console.WriteLine("Evaluates true {0}", pc.EvaluatesTrue);
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("-----------------------------------");
}
Executables seqExecs = seq.Executables;
int numExecs = seqExecs.Count;
Console.WriteLine("Number of Executables in Sequence: {0}", numExecs);
}
}
}
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.SqlServer.Dts.Runtime
Imports Microsoft.SqlServer.Dts.Tasks. FileSystemTask
Namespace Sequence_API
Class Program
Shared Sub Main(ByVal args() As String)
Dim package As Package = New Package()
Dim seq As Sequence = CType(package.Executables.Add("STOCK:SEQUENCE"), Sequence)
' Add a File System task.
Dim eFileTask1 As Executable = seq.Executables.Add("STOCK:FileSystemTask")
Dim thFileTask1 As TaskHost = eFileTask1 as TaskHost
' Add a second File System task.
Dim eFileTask2 As Executable = seq.Executables.Add("STOCK:FileSystemTask")
Dim thFileTask2 As TaskHost = eFileTask2 as TaskHost
' Add a Bulk Insert task.
Dim eBulkInsert As Executable = seq.Executables.Add("STOCK:BulkInsertTask")
Dim thBulkInsert As TaskHost = eBulkInsert as TaskHost
' Add a precedence contraint between eFileTask1 and eFileTask2.
' Set the constraint to be that eFileTask2 cannot run
' until eFileTask1 completes.
Dim pcFileTasks As PrecedenceConstraint = seq.PrecedenceConstraints.Add(eFileTask1,eFileTask2)
' Add another precedence contraint. Add it between eFileTask2 and BulkInsert.
' Again, set the constraint to be that BulkInsert cannot run
' until eFileTask2 completes.
Dim pcFiletoBulk As PrecedenceConstraint = seq.PrecedenceConstraints.Add(eFileTask2,eBulkInsert)
' Obtain the precedence constraint collection, and display properties.
' Some properties are read/write and have not been set.
Dim seqPCs As PrecedenceConstraints = seq.PrecedenceConstraints
Dim numPCs As Integer = seqPCs.Count
Console.WriteLine("Number of precedence constraints in Sequence: {0}", numPCs)
Console.WriteLine("----------------------------------------")
Dim pc As PrecedenceConstraint
For Each pc In seqPCs
Console.WriteLine("Constrained container {0}", pc.ConstrainedExecutable)
Console.WriteLine("Description {0}", pc.Description)
Console.WriteLine("Evaluation operation {0}", pc.EvalOp)
Console.WriteLine("Evaluates true {0}", pc.EvaluatesTrue)
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
Dim seqExecs As Executables = seq.Executables
Dim numExecs As Integer = seqExecs.Count
Console.WriteLine("Number of Executables in Sequence: {0}", numExecs)
End Sub
End Class
End Namespace
Sample Output:
Number of precedence constraints in Sequence: 2
----------------------------------------
Constrained container Microsoft.SqlServer.Dts.Runtime.TaskHost
Description
Evaluation operation Constraint
Evaluates true True
ID {A4F5C0E6-A9A6-470D-9646-7FEAFE3B45AD}
LogicalAnd True
Name {A4F5C0E6-A9A6-470D-9646-7FEAFE3B45AD}
Precedence Executable Microsoft.SqlServer.Dts.Runtime.TaskHost
Value Success
-----------------------------------
Constrained container Microsoft.SqlServer.Dts.Runtime.TaskHost
Description
Evaluation operation Constraint
Evaluates true True
ID {665C52DE-232A-4593-ADF1-7C51949712B8}
LogicalAnd True
Name {665C52DE-232A-4593-ADF1-7C51949712B8}
Precedence Executable Microsoft.SqlServer.Dts.Runtime.TaskHost
Value Success
-----------------------------------
Number of Executables in Sequence: 3