Book Image

Microsoft SQL Server 2012 Integration Services: An Expert Cookbook

Book Image

Microsoft SQL Server 2012 Integration Services: An Expert Cookbook

Overview of this book

SQL Server Integration Services (SSIS) is a leading tool in the data warehouse industry - used for performing extraction, transformation, and load operations. This book is aligned with the most common methodology associated with SSIS known as Extract Transform and Load (ETL); ETL is responsible for the extraction of data from several sources, their cleansing, customization, and loading into a central repository normally called Data Warehouse or Data Mart.Microsoft SQL Server 2012 Integration Services: An Expert Cookbook covers all the aspects of SSIS 2012 with lots of real-world scenarios to help readers understand usages of SSIS in every environment. Written by two SQL Server MVPs who have in-depth knowledge of SSIS having worked with it for many years.This book starts by creating simple data transfer packages with wizards and illustrates how to create more complex data transfer packages, troubleshoot packages, make robust SSIS packages, and how to boost the performance of data consolidation with SSIS. It then covers data flow transformations and advanced transformations for data cleansing, fuzzy and term extraction in detail. The book then dives deep into making a dynamic package with the help of expressions and variables, and performance tuning and consideration.
Table of Contents (23 chapters)
Microsoft SQL Server 2012 Integration Services: An Expert Cookbook
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Creating and using Custom Tasks


SSIS has many Control Flow Tasks to help you in ETL development, but in real-world scenarios, you may need to write code to create something special. For example, suppose that you want to create a delay task which causes Control Flow to wait for some seconds. You can do it within a script task simply using .NET library, but what happens if you want to do the same thing in another package and probably in other projects? You can create your custom task and add it to SSIS toolbox simply, and then whenever you need it, you just need a drag-and-drop.

In this recipe, we will create a simple delay task and add it to SSIS toolbox.

How to do it...

  1. Open Visual Studio 2010 and create a C# Class Library project and name it as R04_Custom Object.

  2. Add the following DLL as references:

    Microsoft.SqlServer.ManagedDTS
  3. Delete the Class1.cs file from Solution Explorer and add a new class and name it as DelayTask.cs.

  4. Add this using statement at the beginning of DelayTask.cs:

    using Microsoft...