TaskHost.SetExpression Método
Assigns the specified expression to the property. Specify nulles una referencia NULL (Nothing en Visual Basic). to remove an existing expression from the property.
Espacio de nombres: Microsoft.SqlServer.Dts.Runtime
Ensamblado: Microsoft.SqlServer.ManagedDTS (en Microsoft.SqlServer.ManagedDTS.dll)
Sintaxis
'Declaración
Public Sub SetExpression ( _
propertyName As String, _
expression As String _
)
'Uso
Dim instance As TaskHost
Dim propertyName As String
Dim expression As String
instance.SetExpression(propertyName, _
expression)
public void SetExpression(
string propertyName,
string expression
)
public:
virtual void SetExpression(
String^ propertyName,
String^ expression
) sealed
abstract SetExpression :
propertyName:string *
expression:string -> unit
override SetExpression :
propertyName:string *
expression:string -> unit
public final function SetExpression(
propertyName : String,
expression : String
)
Parámetros
- propertyName
Tipo: System.String
The name of the property to which to assign the expression.
- expression
Tipo: System.String
The expression.
Implementa
IDTSPropertiesProvider.SetExpression(String, String)
Comentarios
The propertyName can be any property available on the object.
Ejemplos
The following code example shows how to use the SetExpression and GetExpression methods of the TaskHost. For this code example, the hosted task is the BulkInsertTask.
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
using Microsoft.SqlServer.Dts.Tasks.BulkInsertTask;
namespace Microsoft.SqlServer.SSIS.Sample
{
class Program
{
static void Main(string[] args)
{
Package pkg = new Package();
TaskHost th = (TaskHost)pkg.Executables.Add("STOCK:BulkInsertTask");
// View information about the CheckConstraints property
// before setting it using the SetExpression method.
Boolean checkConstraint = (Boolean)th.Properties["CheckConstraints"].GetValue(th);
Console.WriteLine("Original value of CheckConstraints: {0}", checkConstraint);
// Use SetExpression to set the value to true.
String myTrueString = "true";
th.Properties["CheckConstraints"].SetExpression(th, myTrueString);
// 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.
checkConstraint = (Boolean)th.Properties["CheckConstraints"].GetValue(th);
String myExpression = th.Properties["CheckConstraints"].GetExpression(th);
Console.WriteLine("New value of CheckConstraints: {0}", checkConstraint);
Console.WriteLine("Expression for CheckConstraints: {0}", myExpression);
}
}
}
Sample Output:
Original value of CheckConstraints: False
New value of CheckConstraints: True
Expression for CheckConstraints: true