Report Part Drill Down and Hyperlink Customization
In general, the CrystalReportViewer controls are page viewers that let you see complete pages of your Crystal reports. However, the CrystalReportPartsViewer Class lets you see specific report objects without viewing the entire page. Report objects displayed in such a way are referred to as Report Parts.
The key difference between Report Part navigation and regular (page) navigation is that, when navigating with Report Parts (using the CrystalReportPartsViewer control), you see only the objects identified as Report Parts. In regular navigation, you go to the identified object(s), but you see the entire page.