Package.GetExpression Yöntemi
Döndürür bir dize , ifade için belirtilen özellik içerir.Null Hayır anlamına gelir ifade atanır.
Ad Alanı: Microsoft.SqlServer.Dts.Runtime
Derleme: Microsoft.SqlServer.ManagedDTS (Microsoft.SqlServer.ManagedDTS içinde.dll)
Sözdizimi
'Bildirim
Public Function GetExpression ( _
propertyName As String _
) As String
'Kullanım
Dim instance As Package
Dim propertyName As String
Dim returnValue As String
returnValue = instance.GetExpression(propertyName)
public string GetExpression(
string propertyName
)
public:
virtual String^ GetExpression(
String^ propertyName
) sealed
abstract GetExpression :
propertyName:string -> string
override GetExpression :
propertyName:string -> string
public final function GetExpression(
propertyName : String
) : String
Parametreler
- propertyName
Tür: System.String
Adı özellik ifadesini görmek istediğiniz.
Dönüş Değeri
Tür: System.String
A dize içeren ifade özellik değerlendirmek için kullanılır.
Uygulamalar
Açıklamalar
propertyName Olabilir özellik hepsine nesnesi.
Örnekler
Aşağıdaki kod örneği değerini değiştirir DelayValidation özellik kullanarak SetExpression, daha sonra görüntüler kullanarak yeni değer GetExpression.
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
namespace Microsoft.SqlServer.SSIS.Samples
{
class Program
{
static void Main(string[] args)
{
Package pkg = new Package();
// Set an expression on one of the properties.
DtsProperties pkgProperties = pkg.Properties;
// View information about the DelayValidation property
// before setting it with the SetExpression method.
Object myValue = pkgProperties["DelayValidation"].GetValue(pkg);
String mySValue = myValue.ToString();
Console.WriteLine("value before is {0}", mySValue);
// Use SetExpression to set the value to true.
String myTrueString = "true";
pkgProperties["DelayValidation"].SetExpression(pkg, myTrueString);
// Validate the package to set the expression onto the property.
DTSExecResult valResult = pkg.Validate(null, null, null, null);
// Verify the new setting.
myValue = pkgProperties["DelayValidation"].GetValue(pkg);
mySValue = myValue.ToString();
String myExpression = pkg.Properties["DelayValidation"].GetExpression(pkg);
String mySExpression = myExpression.ToString();
Console.WriteLine("The value and expression is {0}, {1}", mySValue, mySExpression);
}
}
}
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.SqlServer.Dts.Runtime
Class Program
Shared Sub Main(ByVal args() As String)
Dim pkg As New Package()
' Set an expression on one of the properties.
Dim pkgProperties As DtsProperties = pkg.Properties
' View information about the DelayValidation property
' before setting it with the SetExpression method.
Dim myValue As [Object] = pkgProperties("DelayValidation").GetValue(pkg)
Dim mySValue As String = myValue.ToString()
Console.WriteLine("value before is {0}", mySValue)
' Use SetExpression to set the value to true.
Dim myTrueString As String = "true"
pkgProperties("DelayValidation").SetExpression(pkg, myTrueString)
' Validate the package to set the expression onto the property.
Dim valResult As DTSExecResult = pkg.Validate(Nothing, Nothing, Nothing, Nothing)
' Verify the new setting.
myValue = pkgProperties("DelayValidation").GetValue(pkg)
mySValue = myValue.ToString()
Dim myExpression As String = pkg.Properties("DelayValidation").GetExpression(pkg)
Dim mySExpression As String = myExpression.ToString()
Console.WriteLine("The value and expression is {0}, {1}", mySValue, mySExpression)
End Sub
End Class
Örnek Çıktı:
value before is False
The value and expression is True, true