It supports interactive features like drill-through reports, document maps, sorting, and parameters.
To understand the Report Viewer, one must first understand its relationship with SSRS. SQL Server Reporting Services (introduced in SQL Server 2000) allowed centralized report management. However, Microsoft soon recognized the need for a control that could render the same RDL files without a server. microsoft report viewer
// 3. Define the report path (relative to the executable) reportViewer1.LocalReport.ReportPath = "Reports\\SalesReport.rdlc"; byte[] renderedBytes = report.Render( "PDF"
byte[] renderedBytes = report.Render( "PDF", "<DeviceInfo><OutputFormat>PDF</OutputFormat></DeviceInfo>", out mimeType, out encoding, out fileNameExtension, out streams, out warnings ); return renderedBytes; out warnings )