Logging in the Script Task
Applies to: 
SQL Server
SSIS Integration Runtime in Azure Data Factory
The use of logging in Integration Services packages lets you record detailed information about execution progress, results, and problems by recording predefined events or user-defined messages for later analysis. The Script task can use the Log method of the Dts object to log user-defined data. If logging is enabled, and the ScriptTaskLogEntry event is selected for logging on the Details tab of the Configure SSIS Logs dialog box, a single call to the Log method stores the event information in all the log providers configured for the task.
Note
Although you can perform logging directly from your Script task, you may want to consider implementing events rather than logging. When using events, not only can you enable the logging of event messages, but you can also respond to the event with default or user-defined event handlers.
For more information about logging, see Integration Services (SSIS) Logging.
Logging Example
The following example demonstrates logging from the Script task by logging a value that represents the number of rows processed.
Public Sub Main()
Dim rowsProcessed As Integer = 100
Dim emptyBytes(0) As Byte
Try
Dts.Log("Rows processed: " & rowsProcessed.ToString, _
0, _
emptyBytes)
Dts.TaskResult = ScriptResults.Success
Catch ex As Exception
'An error occurred.
Dts.Events.FireError(0, "Script Task Example", _
ex.Message & ControlChars.CrLf & ex.StackTrace, _
String.Empty, 0)
Dts.TaskResult = ScriptResults.Failure
End Try
End Sub
using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
public class ScriptMain
{
public void Main()
{
//
int rowsProcessed = 100;
byte[] emptyBytes = new byte[0];
try
{
Dts.Log("Rows processed: " + rowsProcessed.ToString(), 0, emptyBytes);
Dts.TaskResult = (int)ScriptResults.Success;
}
catch (Exception ex)
{
//An error occurred.
Dts.Events.FireError(0, "Script Task Example", ex.Message + "\r" + ex.StackTrace, String.Empty, 0);
Dts.TaskResult = (int)ScriptResults.Failure;
}
}
}