Memilih Kolom Input Secara Terprogram

Berlaku untuk: SQL Server SSIS Integration Runtime di Azure Data Factory

Setelah Anda menghubungkan komponen secara terprogram, pilih kolom dari komponen hulu yang akan Anda ubah atau teruskan ke komponen hilir. Jika Anda tidak memilih kolom input untuk komponen Anda, komponen tidak menerima baris apa pun dari tugas aliran data.

Memilih Kolom

GetVirtualInput Panggil metode untuk mengambil daftar kolom yang tersedia dari komponen upstream, lalu panggil SetUsageType metode instans komponen waktu desain untuk memilih kolom dari koleksi kolom input virtual. Saat Anda memanggil metode ini, komponen membuat kolom input baru dalam koleksi kolom inputnya yang memiliki ID silsilah yang sama dengan kolom yang sesuai dalam kumpulan output komponen upstream.

Jangan pilih kolom dengan memanggil SetUsageType metode objek input virtual secara langsung, karena ini melewati kemampuan komponen untuk menolak kolom berdasarkan jenis data yang tidak pantas atau properti lainnya.

Sampel

Sampel kode berikut menunjukkan cara menggunakan instans waktu desain komponen untuk memilih kolom untuk komponen.

using System;  
using Microsoft.SqlServer.Dts.Runtime;  
using Microsoft.SqlServer.Dts.Pipeline;  
using Microsoft.SqlServer.Dts.Pipeline.Wrapper;  
  
namespace Microsoft.SqlServer.Dts.Samples  
{  
  class Program  
  {  
    static void Main(string[] args)  
    {  
      // Create a package and add a Data Flow task.  
      Package package = new Package();  
      Executable e = package.Executables.Add("STOCK:PipelineTask");  
      TaskHost thMainPipe = e as TaskHost;  
      MainPipe dataFlowTask = thMainPipe.InnerObject as MainPipe;  
  
      // Add an OLE DB connection manager to the package.  
      ConnectionManager conMgr = package.Connections.Add("OLEDB");  
      conMgr.ConnectionString = "Provider=SQLOLEDB.1;" +  
        "Data Source=<servername>;Initial Catalog=AdventureWorks;" +  
        "Integrated Security=SSPI;";  
      conMgr.Name = "SSIS Connection Manager for OLE DB";  
      conMgr.Description = "OLE DB connection to the AdventureWorks database.";  
  
      // Create and configure an OLE DB source component.    
      IDTSComponentMetaData100 source =  
        dataFlowTask.ComponentMetaDataCollection.New();  
      source.ComponentClassID = "DTSAdapter.OleDbSource";  
      // Create the design-time instance of the source.  
      CManagedComponentWrapper srcDesignTime = source.Instantiate();  
      // The ProvideComponentProperties method creates a default output.  
      srcDesignTime.ProvideComponentProperties();  
      // Assign the connection manager.  
      source.RuntimeConnectionCollection[0].ConnectionManager =  
        DtsConvert.GetExtendedInterface(conMgr);  
      // Set the custom properties of the source.  
      srcDesignTime.SetComponentProperty("AccessMode", 2);  
      srcDesignTime.SetComponentProperty("SqlCommand",  
        "Select * from Production.Product");  
  
      // Connect to the data source,  
      //  and then update the metadata for the source.  
      srcDesignTime.AcquireConnections(null);  
      srcDesignTime.ReinitializeMetaData();  
      srcDesignTime.ReleaseConnections();  
  
      // Create and configure an OLE DB destination.  
      IDTSComponentMetaData100 destination =  
        dataFlowTask.ComponentMetaDataCollection.New();  
      destination.ComponentClassID = "DTSAdapter.OleDbDestination";  
      // Create the design-time instance of the destination.  
      CManagedComponentWrapper destDesignTime = destination.Instantiate();  
      // The ProvideComponentProperties method creates a default input.  
      destDesignTime.ProvideComponentProperties();  
  
      // Create the path from source to destination.  
      IDTSPath100 path = dataFlowTask.PathCollection.New();  
      path.AttachPathAndPropagateNotifications(source.OutputCollection[0],  
        destination.InputCollection[0]);  
  
      // Get the destination's default input and virtual input.  
      IDTSInput100 input = destination.InputCollection[0];  
      IDTSVirtualInput100 vInput = input.GetVirtualInput();  
  
      // Iterate through the virtual input column collection.  
      foreach (IDTSVirtualInputColumn100 vColumn in vInput.VirtualInputColumnCollection)  
      {  
        // Call the SetUsageType method of the destination  
        //  to add each available virtual input column as an input column.  
        destDesignTime.SetUsageType(  
           input.ID, vInput, vColumn.LineageID, DTSUsageType.UT_READONLY);  
      }  
  
      // Verify that the columns have been added to the input.  
      foreach (IDTSInputColumn100 inputColumn in destination.InputCollection[0].InputColumnCollection)  
        Console.WriteLine(inputColumn.Name);  
      Console.Read();  
  
      // Add other components to the data flow and connect them.  
    }  
  }  
}  

Imports Microsoft.SqlServer.Dts.Runtime  
Imports Microsoft.SqlServer.Dts.Pipeline  
Imports Microsoft.SqlServer.Dts.Pipeline.Wrapper  
  
Module Module1  
  
  Sub Main()  
  
    ' Create a package and add a Data Flow task.  
    Dim package As Microsoft.SqlServer.Dts.Runtime.Package = _  
      New Microsoft.SqlServer.Dts.Runtime.Package()  
    Dim e As Executable = package.Executables.Add("STOCK:PipelineTask")  
    Dim thMainPipe As Microsoft.SqlServer.Dts.Runtime.TaskHost = _  
      CType(e, Microsoft.SqlServer.Dts.Runtime.TaskHost)  
    Dim dataFlowTask As MainPipe = CType(thMainPipe.InnerObject, MainPipe)  
  
    ' Add an OLE DB connection manager to the package.  
    Dim conMgr As ConnectionManager = package.Connections.Add("OLEDB")  
    conMgr.ConnectionString = "Provider=SQLOLEDB.1;" & _  
      "Data Source=<servername>;Initial Catalog=AdventureWorks;" & _  
      "Integrated Security=SSPI;"  
    conMgr.Name = "SSIS Connection Manager for OLE DB"  
    conMgr.Description = "OLE DB connection to the AdventureWorks database."  
  
    ' Create and configure an OLE DB source component.    
    Dim source As IDTSComponentMetaData100 = _  
      dataFlowTask.ComponentMetaDataCollection.New  
    source.ComponentClassID = "DTSAdapter.OleDbSource"  
    ' Create the design-time instance of the source.  
    Dim srcDesignTime As CManagedComponentWrapper = source.Instantiate  
    ' The ProvideComponentProperties method creates a default output.  
    srcDesignTime.ProvideComponentProperties()  
    ' Assign the connection manager.  
    source.RuntimeConnectionCollection(0).ConnectionManager = _  
      DtsConvert.GetExtendedInterface(conMgr)  
    ' Set the custom properties of the source.  
    srcDesignTime.SetComponentProperty("AccessMode", 2)  
    srcDesignTime.SetComponentProperty("SqlCommand", _  
      "Select * from Production.Product")  
  
    ' Connect to the data source,  
    '  and then update the metadata for the source.  
    srcDesignTime.AcquireConnections(Nothing)  
    srcDesignTime.ReinitializeMetaData()  
    srcDesignTime.ReleaseConnections()  
  
    ' Create and configure an OLE DB destination.  
    Dim destination As IDTSComponentMetaData100 = _  
      dataFlowTask.ComponentMetaDataCollection.New  
    destination.ComponentClassID = "DTSAdapter.OleDbDestination"  
    ' Create the design-time instance of the destination.  
    Dim destDesignTime As CManagedComponentWrapper = destination.Instantiate  
    ' The ProvideComponentProperties method creates a default input.  
    destDesignTime.ProvideComponentProperties()  
  
    ' Create the path from source to destination.  
    Dim path As IDTSPath100 = dataFlowTask.PathCollection.New  
    path.AttachPathAndPropagateNotifications(source.OutputCollection(0), _  
      destination.InputCollection(0))  
  
    ' Get the destination's default input and virtual input.  
    Dim input As IDTSInput100 = destination.InputCollection(0)  
    Dim vInput As IDTSVirtualInput100 = input.GetVirtualInput  
  
    ' Iterate through the virtual input column collection.  
    For Each vColumn As IDTSVirtualInputColumn100 In vInput.VirtualInputColumnCollection  
      ' Call the SetUsageType method of the destination  
      '  to add each available virtual input column as an input column.  
      destDesignTime.SetUsageType(input.ID, vInput, vColumn.LineageID, DTSUsageType.UT_READONLY)  
    Next  
  
    ' Verify that the columns have been added to the input.  
    For Each inputColumn As IDTSInputColumn100 In destination.InputCollection(0).InputColumnCollection  
      Console.WriteLine(inputColumn.Name)  
    Next  
    Console.Read()  
  
    ' Add other components to the data flow and connect them.  
  
  End Sub  
  
End Module  

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Menyimpan Paket Secara Terprogram