DtsEventHandler.GetExpression Method

Returns the expression for the specified property. Null means no expression is assigned.

Espace de noms: Microsoft.SqlServer.Dts.Runtime
Assembly: Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)

Syntaxe

'Déclaration
Public Function GetExpression ( _
    propertyName As String _
) As String

public string GetExpression (
    string propertyName
)

public:
virtual String^ GetExpression (
    String^ propertyName
) sealed

public final String GetExpression (
    String propertyName
)

public final function GetExpression (
    propertyName : String
) : String

Paramètres

propertyName
The name of the property whose expression you want to see.

Valeur de retour

A String that contains the expression used to evaluate the property.

Exemple

The following code example creates a package and adds a DtsEventHandler for the package OnError event. Using the SetExpression, the FailParentOnFailure property is modified. Using the GetExpression method, the new value and associated expression are displayed.

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

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

            // Show the value of DebugMode on the container before modifying it.
            Console.WriteLine("Original FailParentOnFailure = {0}", dtsEH.FailParentOnFailure);

            // Use SetExpression to set DebugMode to "true".
            String myExpression = "True";
            dtsEH.SetExpression("FailParentOnFailure", myExpression);

            //Validate the package to set the expression onto the property.
            DTSExecResult valResult = pkg.Validate(null, null, null, null);

            // Retrieve the new value and the expression.
            String myNewExpression = dtsEH.GetExpression("FailParentOnFailure");
            Console.WriteLine("New value of FailParentOnFailure: {0}", dtsEH.FailParentOnFailure);
            Console.WriteLine("Expression for FailParentOnFailure: {0}", myNewExpression);
        }
    }
}

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

Class SSISProgram
    
    Shared Sub Main(ByVal args() As String) 
        Dim pkg As New Package()
        ' Set up a DtsEventHandler for the package OnError event.
        Dim dtsEH As DtsEventHandler = CType(pkg.EventHandlers.Add("OnError"), DtsEventHandler)
        
        ' Show the value of DebugMode on the container before modifying it.
        Console.WriteLine("Original FailParentOnFailure = {0}", dtsEH.FailParentOnFailure)
        
        ' Use SetExpression to set DebugMode to "true".
        Dim myExpression As String = "True"
        dtsEH.SetExpression("FailParentOnFailure", myExpression)
        
        'Validate the package to set the expression onto the property.
        Dim valResult As DTSExecResult = pkg.Validate(Nothing, Nothing, Nothing, Nothing)
        
        ' Retrieve the new value and the expression.
        Dim myNewExpression As String = dtsEH.GetExpression("FailParentOnFailure")
        Console.WriteLine("New value of FailParentOnFailure: {0}", dtsEH.FailParentOnFailure)
        Console.WriteLine("Expression for FailParentOnFailure: {0}", myNewExpression)
    
    End Sub 'Main
End Class

Sample Output:

Original FailParentOnFailure = False

New value of FailParentOnFailure: True

Expression for FailParentOnFailure: True

Sécurité des threads

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Plateformes

Plateformes de développement

Pour obtenir la liste des plateformes prises en charge, consultez Configuration matérielle et logicielle requise pour l'installation de SQL Server 2005.

Plateformes cibles