DtsEventHandler.PrecedenceConstraints Proprietà

public:
 property Microsoft::SqlServer::Dts::Runtime::PrecedenceConstraints ^ PrecedenceConstraints { Microsoft::SqlServer::Dts::Runtime::PrecedenceConstraints ^ get(); };

public Microsoft.SqlServer.Dts.Runtime.PrecedenceConstraints PrecedenceConstraints { get; }

member this.PrecedenceConstraints : Microsoft.SqlServer.Dts.Runtime.PrecedenceConstraints

Public ReadOnly Property PrecedenceConstraints As PrecedenceConstraints

Valore della proprietà

Raccolta PrecedenceConstraints.

Implementazioni

Esempio

Nell'esempio di codice seguente viene creato un DtsEventHandler oggetto per l'evento OnError nel pacchetto. Questo DtsEventHandler contenitore contiene due eseguibili e stabilisce un vincolo di precedenza tra di essi. Nell'esempio di codice viene visualizzato il numero di vincoli di precedenza nel contenitore.

using System;  
using System.Collections.Generic;  
using System.Text;  
using Microsoft.SqlServer.Dts.Runtime;  
using Microsoft.SqlServer.Dts.Tasks.SendMailTask;  
using Microsoft.SqlServer.Dts.Tasks.BulkInsertTask;  

namespace Microsoft.SqlServer.SSIS.Samples  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            Package pkg = new Package();  
            // Set up a DtsEventHandler for the OnError event of the package.  
            DtsEventHandler dtsEH = (DtsEventHandler)pkg.EventHandlers.Add("OnError");  

            // Show the name and type of the properties in DtsEventHandler  
            // using the Properties collection.  
            DtsProperties props = dtsEH.Properties;  
            String name;  
            TypeCode propType;  
            foreach (DtsProperty prop in props)  
            {  
                propType = prop.Type;  
                name = prop.Name;  
                Console.WriteLine("Name {0}, Type {1}", name, propType);  
            }  

            // When an OnError Event occurs, the Executables collection contains  
            // the items to run. For this example, there will be a SendMailtTask  
            // and a BulkInsertTask with a precedence constraint between them.  
            Executable dtsEH1 = dtsEH.Executables.Add("STOCK:SendMailTask");  
            TaskHost th = (TaskHost)dtsEH1;  
            SendMailTask smTask = (SendMailTask)th.InnerObject;  
            smTask.Subject = "Send Mail task";  

            // Add a second executable to the DtsEventHandler.  
            Executable dtsEH2 = dtsEH.Executables.Add("STOCK:BulkInsertTask");  
            TaskHost th2 = (TaskHost)dtsEH2;  

            // Add a precedence constraint between the two tasks.  
            PrecedenceConstraint pc = dtsEH.PrecedenceConstraints.Add(dtsEH1, dtsEH2);  
            pc.Value = DTSExecResult.Completion;  

            // Review the number of constraints in the DtsEventHandler collection.  
            PrecedenceConstraints pcDTSEH = dtsEH.PrecedenceConstraints;  
            Console.WriteLine("Number of precedence constraints in DtsEventHandler: {0}", dtsEH.PrecedenceConstraints.Count);  

            // Review the number of executables in the DtsEventHandler collection.  
            Console.WriteLine("Number of executables in DtsEventHandler: {0}", dtsEH.Executables.Count);  

            // Remove the first executable in the DtsEventHandler collection.  
            dtsEH.Executables.Remove(0);  
            Console.WriteLine("New number of exeutables in DtsEventHandler: {0}", dtsEH.Executables.Count);  
        }  
    }  
}  

Imports System  
Imports System.Collections.Generic  
Imports System.Text  
Imports Microsoft.SqlServer.Dts.Runtime  
Imports Microsoft.SqlServer.Dts.Tasks.SendMailTask  
Imports Microsoft.SqlServer.Dts.Tasks.BulkInsertTask  

Namespace Microsoft.SqlServer.SSIS.Samples  
    Class Program  
        Shared  Sub Main(ByVal args() As String)  
            Dim pkg As Package =  New Package()   
            ' Set up a DtsEventHandler for the OnError event of the package.  
            Dim dtsEH As DtsEventHandler = CType(pkg.EventHandlers.Add("OnError"), DtsEventHandler)  

            ' Show the name and type of the properties in DtsEventHandler  
            ' using the Properties collection.  
            Dim props As DtsProperties =  dtsEH.Properties   
            Dim name As String  
            Dim propType As TypeCode  
            Dim prop As DtsProperty  
            For Each prop In props  
                propType = prop.Type  
                name = prop.Name  
                Console.WriteLine("Name {0}, Type {1}", name, propType)  
            Next  

            ' When an OnError Event occurs, the Executables collection contains  
            ' the items to run. For this example, there will be a SendMailtTask  
            ' and a BulkInsertTask with a precedence constraint between them.  
            Dim dtsEH1 As Executable =  dtsEH.Executables.Add("STOCK:SendMailTask")   
            Dim th As TaskHost = CType(dtsEH1, TaskHost)  
            Dim smTask As SendMailTask = CType(th.InnerObject, SendMailTask)  
            smTask.Subject = "Send Mail task"  

            ' Add a second executable to the DtsEventHandler.  
            Dim dtsEH2 As Executable =  dtsEH.Executables.Add("STOCK:BulkInsertTask")   
            Dim th2 As TaskHost = CType(dtsEH2, TaskHost)  

            ' Add a precedence constraint between the two tasks.  
            Dim pc As PrecedenceConstraint =  dtsEH.PrecedenceConstraints.Add(dtsEH1,dtsEH2)   
            pc.Value = DTSExecResult.Completion  

            ' Review the number of constraints in the DtsEventHandler collection.  
            Dim pcDTSEH As PrecedenceConstraints =  dtsEH.PrecedenceConstraints   
            Console.WriteLine("Number of precedence constraints in DtsEventHandler: {0}", dtsEH.PrecedenceConstraints.Count)  

            ' Review the number of executables in the DtsEventHandler collection.  
            Console.WriteLine("Number of executables in DtsEventHandler: {0}", dtsEH.Executables.Count)  

            ' Remove the first executable in the DtsEventHandler collection.  
            dtsEH.Executables.Remove(0)  
            Console.WriteLine("New number of exeutables in DtsEventHandler: {0}", dtsEH.Executables.Count)  
        End Sub  
    End Class  
End Namespace  

Esempio di output

Name CreationName, Type String

Nome DelayValidation, Tipo Boolean

Descrizione nome, tipo stringa

Nome Disabilita, Digitare Boolean

Nome eseguibili, oggetto Type

Nome ExecutionDuration, Digitare Int32

Nome ExecutionResult, Oggetto Type

Nome ExecutionStatus, Oggetto Type

Variabili nome, oggetto Type

Numero di vincoli di precedenza in DtsEventHandler: 1

Numero di eseguibili in DtsEventHandler: 2

Nuovo numero di exeutable in DtsEventHandler: 1

Commenti

Una PrecedenceConstraints raccolta è una raccolta di PrecedenceConstraint oggetti.

Si applica a