How do I hide sections based upon some criteria?

I'm working on a SQL Server Reporting Service report, that will eventually be in my WPF app. There are certain sections of the report which should only be shown, if certain conditions are met. How do I make se开发者_JAVA百科ctions appear or be hidden/collapsed in the Report Viewer? (I'm working in VS 2010.)

It may depend on what you mean by "section". Most report objects (such as text boxes, table rows, etc.) have a property Visibility>Hidden which can be set to a condition, by selecting the <Expression...> option for the property in the Properties window in the Report Designer.