Kbase 22027: ACTIVEX: How To Use Crystal Reports Viewer -- Sample Program
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
5/15/2002 |
|
SUMMARY:
This Solution demonstrates how to open a Crystal Reports report by using the Crystal Reports Viewer OCX control.
EXPLANATION:
Further information can be found by opening the following files in the Progress COM Object Viewer tool (Tools -> PRO*Tools):
- crviewer.dll
- craxdrt.dll
SOLUTION:
This sample was tested with Crystal Reports 8.5.
1) Insert the Crystal Report Viewer Control into a window.
2) Add a button and copy the following code into the CHOOSE trigger.
DEFINE VARIABLE crApplication AS COM-HANDLE NO-UNDO.
DEFINE VARIABLE crReport AS COM-HANDLE NO-UNDO.
CREATE "CrystalRuntime.Application" crApplication.
CREATE "CrystalRuntime.Report" crReport.
/* Set the report object */
crReport = crApplication:OpenReport("W:\report1.rpt").
/* Enables the CRViewer's Navigation Controls */
chCtrlFrame:CRViewer:EnableNavigationControls = TRUE.
/* Enables the CRViewer's Export button */
chCtrlFrame:CRViewer:EnableExportButton = TRUE.
/* Disables the CRViewer's Search control */
chCtrlFrame:CRViewer:EnableSearchControl = FALSE.
/* Set the report source */
chCtrlFrame:CRViewer:ReportSource = crReport.
/* View the report */
chCtrlFrame:CRViewer:ViewReport().
RELEASE OBJECT crApplication.
RELEASE OBJECT crReport.
NOTE: Ensure that all COM-HANDLE variables are released. Otherwise 2
problems might occur:
-- When closing the report:
The temporary files generated by Crystal Reports will not be
deleted. They should be in the directory specified by the TMP
environment variable.
-- When closing the Progress session:
The Prowin32.exe process will use 100% of the CPU until an
"Application Error" message appears.
The exact error message is:
OleMainThreadWndName: prowin32.exe - Application Error
References to Written Documentation:
Progress Knowledge Base Solution 20334, "ACTIVEX - How To View a Crystal Reports Report"