On click how to open crystal report

Question

I want to open crystal report on click event without using crystal report viewer.How to do that any help will be appericiated.

 

my code is-

 

ReportDocument reportDocument = new ReportDocument();

reportDocument.Load("D:\\Desktop\\Epion 30.3.2019\\server\\DomainRepository\\Report\\CasePaper.rpt");

reportDocument.SetParameterValue("opipid", opipid);

reportDocument.ExportToDisk(ExportFormatType.PortableDocFormat, "D:/reportpdf.pdf");