Sequence.SetExpression 方法
Assigns the specified expression to the property. Specify nullnull 參考 (在 Visual Basic 中為 Nothing) to remove an existing expression from the property.
命名空間： Microsoft.SqlServer.Dts.Runtime
組件： Microsoft.SqlServer.ManagedDTS (在 Microsoft.SqlServer.ManagedDTS.dll 中)
語法
'宣告
Public Sub SetExpression ( _
propertyName As String, _
expression As String _
)
'用途
Dim instance As Sequence
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
)
參數
- propertyName
型別：System.String
The name of the property to which to assign the expression.
- expression
型別：System.String
The expression.
實作
IDTSPropertiesProvider.SetExpression(String, String)
備註
The propertyName can be any property available on the object.
範例
The following code example uses SetExpression to modify the value of the Description on a Sequence container. Then GetExpression is used to retrieve the expression.
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
namespace Microsoft.SqlServer.SSIS.Sample
{
class Program
{
static void Main(string[] args)
{
const String containerName = "Sequence";
Package pkg = new Package();
Sequence sequence = (Sequence)pkg.Executables.Add("STOCK:Sequence");
DtsProperties seqProps = sequence.Properties;
// View information about the Description property
// before setting it using the SetExpression method.
String desc = sequence.Description;
Console.WriteLine("Original value of Description: {0}", desc);
// Use SetExpression to give the Sequence a description.
String myExpression = "\"Testing " + containerName + "\"";
sequence.SetExpression("Description", myExpression);
// Note that I've tried using the Properties bag instead, with no change to the results.
//seqProps["Description"].SetExpression(sequence, 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 myNewDesc = sequence.Description;
String myNewExpression = sequence.GetExpression("Description");
Console.WriteLine("New value of Description: {0}", myNewDesc);
Console.WriteLine("Expression for Description: {0}", myNewExpression);
}
}
}
Sample Output:
Original value of Description:
New value of Description: Testing Sequence
Expression for Description: "Testing Sequence"