api controller using AspNetCore.Reporting thows System.FormatException: 'The header contains invalid values at index 0

Question

This api controller is used to return a pdf stream to display in an html object tag

using AspNetCore.Reporting;
using Microsoft.AspNetCore.Mvc;

        [HttpGet, Route("ProcedureRangeForm")]
        public IActionResult ProcedureRangeForm(string procedureRangeId, byte procedureTypeId)
        {
            int extension = 1;
            var _reportPath = "";
            switch (procedureRangeId)
            {
                case "1":
                    _reportPath = @"Reports\ProcedureRangeForm1.rdlc";
                    break;
                case "2":
                    _reportPath = @"Reports\ProcedureRangeForm2.rdlc";
                    break;
                case "3":
                    _reportPath = @"Reports\ProcedureRangeForm3.rdlc";
                    break;
                default:
                    // code block
                    break;
            }
            //Employee employee = _context.Employees.FirstOrDefault(x => x.Id == "41")!;
            ProcedureType procedureType = _context.ProcedureTypes.FirstOrDefault(x => x.Id == procedureTypeId);
            //RelationDegree relationDegree = _context.RelationDegrees.FirstOrDefault(x => x.Id == 1)!;
            var reportParams1 = new Dictionary<string, string>();
            var reportParams2 = new Dictionary<string, string>();
            var reportParams3 = new Dictionary<string, string>();
            reportParams1.Add("UnitCode", "UnitCode");
            reportParams1.Add("ProcedureType", procedureType!.Name!);
            reportParams2.Add("ProcedureType", procedureType!.Name!);
            reportParams3.Add("ProcedureType", procedureType!.Name!);
            //reportParams1.Add("Attachments", "");

            LocalReport localReport = new LocalReport(_reportPath);
            FileContentResult fileContentResult;
            MemoryStream memory = new();
            try
            {
                ReportResult result = null!;
                switch (procedureRangeId)
                {
                    case "1":      
                        result = localReport.Execute(RenderType.Pdf, extension, parameters: reportParams1);
                        break;
                    case "2":
                        result = localReport.Execute(RenderType.Pdf, extension, parameters: reportParams2);
                        break;
                    case "3":
                        result = localReport.Execute(RenderType.Pdf, extension, parameters: reportParams3);
                        break;
                    default:
                        // code block
                        break;
                }
                byte[] file = result.MainStream;
                fileContentResult = new FileContentResult(file, "application/pdf");
            }
            catch (Exception e)
            {
                Console.WriteLine("{0} Exception caught.", e);
                return Content(HttpStatusCode.InternalServerError.ToString(), e.Message);
            }
            finally
            {
            }
            return fileContentResult;
        }

I want to call this api more than once with varient parameters. when i call once to display ProcedureRangeForm1.rdlc it run successfully , but when i call again to display ProcedureRangeForm2.rdlc throw this exception

System.FormatException: 'The header contains invalid values at index 0: 'An error occurred during local report processing.;The definition of the report 'Reports\ProcedureRangeForm1.rdl' is invalid. An unexpected error occurred in Report Processing. The process cannot access the file 'hdsktzjh.err' because it is being used by another process.''

Answer 1

After a lot of research, I found a solution to my question:

First, I used nuget package Tmds.ExecFunction by Execute a function in a separate process as in this link But I didn't get what I wanted

And then I replaced the library AspNetCore.Reporting by ReportViewerCore.NETCore as in this link the problem solved as this code

using Microsoft.Reporting.NETCore;

[Route("api/[controller]")]
[ApiController]
public class ProcedureRangeFormsController : ControllerBase
{

    private readonly HousingDbContext _context;
    public ProcedureRangeFormsController(HousingDbContext context)
    {
        _context = context;
    }
    // GET api/values
    [HttpGet, Route("ProcedureRangeForm/{procedureRangeId}/{procedureTypeId}")]
    public IActionResult ProcedureRangeForm(string procedureRangeId, string procedureTypeId)
    {
        var reportPath = "";
        switch (procedureRangeId)
        {
            case "1":
                reportPath = "TaxHousing.Reports.ProcedureRangeForm1.rdlc";
                break;
            case "2":
                reportPath = "TaxHousing.Reports.ProcedureRangeForm2.rdlc";
                break;
            case "3":
                reportPath = "TaxHousing.Reports.ProcedureRangeForm3.rdlc";
                break;
            default:
                // code block
                break;
        }

        using var rs = Assembly.GetExecutingAssembly().GetManifestResourceStream(reportPath);
        var localReport = new Microsoft.Reporting.NETCore.LocalReport();
        localReport.LoadReportDefinition(rs);
        var reportParams1 = new[] { 
            new ReportParameter("ProcedureType", "ProcedureType1"),
            new ReportParameter("UnitCode", "UnitCode1") 
        };
        var reportParams2 = new[] { 
            new ReportParameter("ProcedureType", "ProcedureType2")
        };
        var reportParams3 = new[] {
            new ReportParameter("ProcedureType", "ProcedureType3")
        };
        byte[] file = null;
        switch (procedureRangeId)
        {
            case "1":
                localReport.SetParameters(reportParams1);
                break;
            case "2":
                localReport.SetParameters(reportParams2);
                break;
            case "3":
                localReport.SetParameters(reportParams3);
                break;
            default:
                // code block
                break;
        }

        try
        {
            file = localReport.Render("PDF");
        }
        catch (Exception e)
        {
            Console.WriteLine("{0} Exception caught.", e);
            return Content(HttpStatusCode.InternalServerError.ToString(), e.Message);
        }

        return new FileContentResult(file, "application/pdf");
    }
}