Primary classes

Report Application Server .NET SDK Developer Guide

Primary classes

The two primary classes in the SDK are CrystalReportViewer, which allows you to display reports, and ReportClientDocument, which allows you to create and modify reports.

CrystalReportViewer class

A unique viewer class exists for each kind of presentation layer: Web Form, Windows Form, or mobile form. Each viewer is designed as a form control.

For Web applications, the CrystalReportViewer class is a Web server control. You place this control on the Web Form to render reports. Its corresponding instance in the code-behind class is then linked to RAS, once you assign an instance of ReportClientDocument to its ReportSource property:

Visual Basic
myCrystalReportViewer.ReportSource = myReportClientDocument

C#
crystalReportViewer.ReportSource = reportClientDocument;

The instance of ReportClientDocument comprises a report, which is then rendered on the page by the viewer. For more information on viewers, see .NET report viewer controls.

Use the CrystalDecisions.Web namespace for the Web Form version of the CrystalReportViewer control.

ReportClientDocument class

ReportClientDocument is the central class from which the other classes in the SDK are accessed. The instance of ReportClientDocument comprises a report that can be modified programmatically by its class properties. These properties are linked to a series of other libraries in the SDK that contain controllers, data definition models, and report definition models:

ReportDefinition corresponds to the layout of the report, as shown in the Crystal Reports Designer.
DataDefinition corresponds to the field explorer in the Crystal Reports Designer.
RowsetController corresponds to the processed data values of each detail row, when viewing the report at run time.

Note Note

For detailed information on the RAS object model, see ReportClientDocument Object Model.

This ReportClientDocument instance may consist of several types of reports:

An existing .rpt file that has been loaded from a directory, and then modified with the report definition and data definition classes of the RAS SDK.
A completely new, empty report that is constructed with the report definition and data definition classes of the RAS SDK.

The ReportClientDocument class instance may be loaded only long enough to pass the instance to the viewer for display, before it passes out of scope. However, the class instance may also be modified, and then saved as a report to a directory with one of the controller classes. For more information on ReportClientDocument and its relationship to the rest of the classes in the SDK, see RAS SDK.

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