create pdf from Report Template designed be using Standalone designer in Telerik Reporting in .net core

[Sameer]

// following example to create pdf from report template which created using standalone designer template

public class ReportsController : ReportsControllerBase
 {
     readonly string reportsPath = string.Empty;
        
     private IHostingEnvironment _hostingEnvironment;
        

    public ReportsController(ConfigurationService configSvc)
    {
        this.reportsPath = Path.Combine("PathWhereReportTemplatesStored", "Reports"); //concatenate the path using the OS path delimiter.
        
        this.ReportServiceConfiguration = new ReportServiceConfiguration
        {
            ReportingEngineConfiguration = configSvc.Configuration,
            HostAppId = "Html5DemoAppCore",
            Storage = new FileStorage(),
            ReportResolver = new ReportTypeResolver()
                                .AddFallbackResolver(new ReportFileResolver(this.reportsPath)),
            
        };
    }

    [HttpGet("reportlist")]
    public IEnumerable<string> GetReports()
    {
        return Directory
            .GetFiles(this.reportsPath)
            .Select(path =>
                Path.GetFileName(path));
    }
         
    //https://www.telerik.com/support/kb/reporting/styling-and-formatting-reports/details/exporting-a-report-to-pdf-programmatically
    [HttpGet]
    public IActionResult createPdf()
    {
        string fileName = "report_" + DateTime.Now.Ticks + ".pdf";

        // https://docs.telerik.com/reporting/report-sources-viewers
        var uriReportSource = new Telerik.Reporting.UriReportSource();
        
        // Specifying an URL or a file path
        uriReportSource.Uri = reportsPath + "\\reportTemplate.trdp";    // report template designed using standalone report designer
        
        // Optional, pass param values to report, Adding the initial parameter values
        uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("param1", "value"));
        uriReportSource.Parameters.Add(new Telerik.Reporting.Parameter("param2", "value"));

        ReportProcessor reportProcessor = new ReportProcessor();

        RenderingResult result = reportProcessor.RenderReport("PDF", uriReportSource, null);     

        // to write pdf on disc, omit if not required
        using (FileStream fs = new FileStream("PathWhereYouWantToWritePdfOnDisk" + "pdfName.pdf", FileMode.Create))
        {
            fs.Write(result.DocumentBytes, 0, result.DocumentBytes.Length);
        }    

        return File(result.DocumentBytes, "application/pdf", fileName);    // in case , user clicks on link and download report
    }

 }

[Silviya]

Hi Sameer,

From my understanding, you want to export the report in PDF format programmatically (without using the report viewer) from a .NET Core application. 
In general, to export a report, you can use the RenderReport method of the ReportProcessor class. This method converts the contents of the report to a byte array in the specified format, which you can then use with other classes such as MemoryStream or FileStream. For more information, please refer to Exporting a report to a single document format help article.

The provided code snippet seems to be correct. May I ask you to provide us more information about the issues you have. Are there any errors? Additionally, you might open a new support ticket and send us the problematic project to check its settings.

Best Regards, Silviya
Progress Telerik