SSRS 2008 2008 (and later Version) Provides Globals! Render.FormatName which decides what can be achieved to the Data Region (Table, matrix, Chart, Gauge, etc...) when Rendered in different formats.
A Report Contains a Drill through Action on a matrix when clicked has to render a New Report Deployed in the Report server.
When the Report was Exported to Excel its shows the Action in the below format as a Hyperlink which should be Hidden as it doesn’t look good aesthetically.
Before when it was exported to Excel

To Over Come this issue:
Add the Expression as described below
=IIF(Globals!RenderFormat.Name<>"Excel","ReportDrillDown",Nothing)

After the Expression has been added and exported to Excel

Voila Amingo ! You can use the same Logic to Hide the Entire Table and other Cool stuffs !