Expression Builder (Integration Services)
Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).
The Expression Builder dialog box provides a graphical user interface for building the expressions that property expressions use. You can access the Expression Builder dialog box from the custom task dialog boxes in SSIS Designer, and from the Properties window in SQL Server Data Tools (SSDT).
You can use the Expression Builder dialog box to perform the following tasks:
Building the expressions
Evaluating the expression