Previewing a report

It is possible to display a report in the preview window in two ways: either by calling the TfrxReport.ShowReport method (described above), or with the help of the TfrxReport.ShowPreparedReport method. In the second case, the report construction is not performed, but a finished report is displayed. That means, that you should either construct it beforehand with the help of the PrepareReport method, or load a previously constructed report from the file (see Loading and saving a finished report).

Example:

Pascal:

if frxReport1.PrepareReport then
  frxReport1.ShowPreparedReport;

C++:

if(frxReport1->PrepareReport(true))
  frxReport1->ShowPreparedReport();

In this case, report construction is finished first, and after that it is displayed in the preview window. Construction of a large report can take a lot of time, and that is why it is better to use the ShowReport anisochronous method, than the PrepareReport/ShowPreparedReport one. One can assign preview settings by default via the TfrxReport.PreviewOptions property.