connecting-to-data-sources-in-the-script-task.md

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Connecting to Data Sources in the Script Task	Connecting to Data Sources in the Script Task	chugugrace	chugu	03/14/2017	sql	integration-services	reference	connections [Integration Services], scripts Integration Services packages, connections connection managers [Integration Services], scripts scripts [Integration Services], connections SSIS packages, connections packages [Integration Services], connections Script task [Integration Services], connections Connections property SQL Server Integration Services packages, connections SSIS Script task, connections	VB

Connecting to Data Sources in the Script Task

[!INCLUDEsqlserver-ssis]

Connection managers provide access to data sources that have been configured in the package. For more information, see Integration Services (SSIS) Connections.

The Script task can access these connection managers through the xref:Microsoft.SqlServer.Dts.Tasks.ScriptTask.ScriptObjectModel.Connections%2A property of the Dts object. Each connection manager in the xref:Microsoft.SqlServer.Dts.Runtime.Connections collection stores information about how to connect to the underlying data source.

When you call the xref:Microsoft.SqlServer.Dts.Runtime.ConnectionManager.AcquireConnection%2A method of a connection manager, the connection manager connects to the data source, if it is not already connected, and returns the appropriate connection or connection information for you to use in your Script task code.

Note

You must know the type of connection returned by the connection manager before calling AcquireConnection. Because the Script task has Option Strict enabled, you must cast the connection, which is returned as type Object, to the appropriate connection type before you can use it.

You can use the xref:Microsoft.SqlServer.Dts.Runtime.Connections.Contains%2A method of the xref:Microsoft.SqlServer.Dts.Runtime.Connections collection returned by the xref:Microsoft.SqlServer.Dts.Tasks.ScriptTask.ScriptObjectModel.Connections%2A property to look for an existing connection before using the connection in your code.

Important

You cannot call the AcquireConnection method of connection managers that return unmanaged objects, such as the OLE DB connection manager and the Excel connection manager, in the managed code of a Script task. However, you can read the ConnectionString property of these connection managers, and connect to the data source directly in your code by using the connection string with an OledbConnection from the System.Data.OleDb namespace.

If you must call the AcquireConnection method of a connection manager that returns an unmanaged object, use an [!INCLUDEvstecado] connection manager. When you configure the [!INCLUDEvstecado] connection manager to use an OLE DB provider, it connects by using the [!INCLUDEdnprdnshort] Data Provider for OLE DB. In this case, the AcquireConnection method returns a System.Data.OleDb.OleDbConnection instead of an unmanaged object. To configure an [!INCLUDEvstecado] connection manager for use with an Excel data source, select the [!INCLUDEmsCoName] OLE DB Provider for Jet, specify an Excel file, and enter Excel 8.0 (for Excel 97 and later) as the value of Extended Properties on the All page of the Connection Manager dialog box.

Connections Example

The following example demonstrates how to access connection managers from within the Script task. The sample assumes that you have created and configured an [!INCLUDEvstecado] connection manager named Test ADO.NET Connection and a Flat File connection manager named Test Flat File Connection. Note that the [!INCLUDEvstecado] connection manager returns a SqlConnection object that you can use immediately to connect to the data source. The Flat File connection manager, on the other hand, returns only a string that contains the path and file name. You must use methods from the System.IO namespace to open and work with the flat file.

    Public Sub Main()

        Dim myADONETConnection As SqlClient.SqlConnection =
            DirectCast(Dts.Connections("Test ADO.NET Connection").AcquireConnection(Dts.Transaction),
                SqlClient.SqlConnection)
        MsgBox(myADONETConnection.ConnectionString,
            MsgBoxStyle.Information, "ADO.NET Connection")

        Dim myFlatFileConnection As String =
            DirectCast(Dts.Connections("Test Flat File Connection").AcquireConnection(Dts.Transaction),
                String)
        MsgBox(myFlatFileConnection, MsgBoxStyle.Information, "Flat File Connection")

        Dts.TaskResult = ScriptResults.Success

    End Sub

		public void Main()
		{
            SqlConnection myADONETConnection = 
                Dts.Connections["Test ADO.NET Connection"].AcquireConnection(Dts.Transaction)
                as SqlConnection;
            MessageBox.Show(myADONETConnection.ConnectionString, "ADO.NET Connection");

            string myFlatFileConnection = 
                Dts.Connections["Test Flat File Connection"].AcquireConnection(Dts.Transaction) 
                as string;
            MessageBox.Show(myFlatFileConnection, "Flat File Connection");

            Dts.TaskResult = (int)ScriptResults.Success;
		}

See Also

Integration Services (SSIS) Connections
Create Connection Managers