TaskHost.GetExpression 메서드

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

네임스페이스:  Microsoft.SqlServer.Dts.Runtime
어셈블리:  Microsoft.SqlServer.ManagedDTS(Microsoft.SqlServer.ManagedDTS.dll)

구문

‘선언
Public Function GetExpression ( _
    propertyName As String _
) As String
‘사용 방법
Dim instance As TaskHost 
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

매개 변수

• propertyName
  유형: System.String
  The name of the property whose expression you want to see.

반환 값

유형: System.String
A String that contains the expression used to evaluate the property.

구현

IDTSPropertiesProvider.GetExpression(String)

주의

The propertyName can be any property available on the object.

예

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

참고 항목

참조

TaskHost 클래스

Microsoft.SqlServer.Dts.Runtime 네임스페이스