On this page, select the required data context from the list of data contexts available in the current project assembly.
To use a data context that exists in the current project assembly, select it in the Choose Context list and click Next.
In the End-User Report Designer, the Browse button is not available on this page by default. To be able to select a data context from a custom assembly, set the EFWizardSettings.ShowBrowseButton property to true. To learn more, see Data Access Security.
Click Next to proceed to the next wizard page: Select a Connection String.