Variables.Item[Object] Properti

Definisi

Ruang nama:

Microsoft.SqlServer.Dts.Runtime

Rakitan:

Microsoft.SqlServer.ManagedDTS.dll

Mengembalikan Variable objek dari Variables koleksi.

public:
 property Microsoft::SqlServer::Dts::Runtime::Variable ^ default[System::Object ^] { Microsoft::SqlServer::Dts::Runtime::Variable ^ get(System::Object ^ index); };

public Microsoft.SqlServer.Dts.Runtime.Variable this[object index] { get; }

member this.Item(obj) : Microsoft.SqlServer.Dts.Runtime.Variable

Default Public ReadOnly Property Item(index As Object) As Variable

Parameter

index

Object

Nama, ID, deskripsi, atau indeks objek yang akan Variable dikembalikan.

Nilai Properti

Variable

Objek Variable.

Contoh

Contoh kode berikut menambahkan variabel ke paket. Contoh kode menggunakan berbagai metode untuk menemukan variabel dan mencetak nama, nilai, dan namespace layanannya.

using System;  
using System.Collections.Generic;  
using System.Text;  
using Microsoft.SqlServer.Dts.Runtime;  
namespace Adding_Variables  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            Application app = new Application();  
            // Load a sample package that contains a variable that sets the file name.  
            Package pkg = app.LoadPackage(@"C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx", null);  
            Variables pkgVars = pkg.Variables;  
            Variable myVar = pkg.Variables.Add("myCustomVar", false, "User", "3");  

            // Verify whether the variable is in the collection now.  
            Boolean hasMyVar = pkg.Variables.Contains("myCustomVar");  
            Console.WriteLine("The variable was found? {0}", hasMyVar);  

            // Loop over the collection using the foreach keyword.  
            foreach (Variable pkgVar in pkgVars)  
            {  
                // Print variables only from the User namespace.  
                if (pkgVar.Namespace == "User")  
                {  
                Console.WriteLine("Variable: {0}, {1}", pkgVar.Name, pkgVar.Value.ToString());  
                 }  
            }  
            Console.WriteLine("---------------------------");  
            // Loop over the collection using the Enumerator.   
            VariableEnumerator myEnum = pkg.Variables.GetEnumerator();  
            int i = 0;  
            while ((myEnum.MoveNext()) && (myEnum.Current != null))  
                // Again, show only the variables in the User namespace.  
                if (myEnum.Current.Namespace == "User")  
                {                  
                    Console.WriteLine("[{0}] {1}, {2}", i++, myEnum.Current.Name, myEnum.Current.Namespace);  
                }  

            myEnum.Reset();  
            Console.WriteLine("---------------------------");  

            //Using the Item method syntax of [x], obtain the  
            // first entry in the collection.  
            myVar = pkgVars[0];  
            Console.WriteLine("The name and namespace of the first variable is: {0}, {1}", myVar.Name, myVar.Namespace);  
            String nameOfFirstItem = pkgVars[0].Name;  
            Console.WriteLine("The name of the first variable is: {0}", nameOfFirstItem);  
            //}  
        }  
    }  
}  

Imports System  
Imports System.Collections.Generic  
Imports System.Text  
Imports Microsoft.SqlServer.Dts.Runtime  
Namespace Adding_Variables  
    Class Program  
        Shared  Sub Main(ByVal args() As String)  
            Dim app As Application =  New Application()   
            ' Load a sample package that contains a variable that sets the file name.  
            Dim pkg As Package =  app.LoadPackage("C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx",Nothing)   
            Dim pkgVars As Variables =  pkg.Variables   
            Dim myVar As Variable =  pkg.Variables.Add("myCustomVar",False,"User","3")   

            ' Verify whether the variable is in the collection now.  
            Dim hasMyVar As Boolean =  pkg.Variables.Contains("myCustomVar")   
            Console.WriteLine("The variable was found? {0}", hasMyVar)  

            ' Loop over the collection using the foreach keyword.  
            Dim pkgVar As Variable  
            For Each pkgVar In pkgVars  
                ' Print variables only from the User namespace.  
                If pkgVar.Namespace = "User" Then  
                Console.WriteLine("Variable: {0}, {1}", pkgVar.Name, pkgVar.Value.ToString())  
                End If  
            Next  
            Console.WriteLine("---------------------------")  
            ' Loop over the collection using the Enumerator.   
            Dim myEnum As VariableEnumerator =  pkg.Variables.GetEnumerator()   
            Dim i As Integer =  0   
            While (myEnum.MoveNext()) &&(myEnum.Current <> Nothing)  
                    Console.WriteLine("[{0}] {1}, {2}",i = Console.WriteLine("[{0}] {1}, {2}",i + 1  
            End While  

            myEnum.Reset()  
            Console.WriteLine("---------------------------")  

            'Using the Item method syntax of [x], obtain the  
            ' first entry in the collection.  
            myVar = pkgVars(0)  
            Console.WriteLine("The name and namespace of the first variable is: {0}, {1}", myVar.Name, myVar.Namespace)  
            Dim nameOfFirstItem As String =  pkgVars(0).Name   
            Console.WriteLine("The name of the first variable is: {0}", nameOfFirstItem)  
            '}  
        End Sub  
    End Class  
End Namespace  

Contoh Output:

Variabel ditemukan? True

Variabel: myCustomVar, 3

---------------------------

[0] myCustomVar, Pengguna

---------------------------

Nama dan namespace variabel pertama adalah: CancelEvent, System

Nama variabel pertama adalah: CancelEvent

Keterangan

Jika panggilan ke Contains metode mengembalikan true, Anda dapat mengakses elemen yang ditentukan dalam koleksi dengan menggunakan sintaks Variables[index]. Contains Jika metode mengembalikan false, properti ini memberikan pengecualian. Di C#, properti ini adalah pengindeks Variables untuk kelas .