Reports = await Http.GetFromJsonAsync<List<string>>($"{BaseAddress}/getreports") ?? new List<string>();

<div style="padding-top:10px;">
    <ReportViewer @ref ="_reportViewer1"
                       ViewerId="rv1"
                       ServiceUrl="http://localhost:59655/api/reports"
                       ReportSource="@(new ReportSourceOptions()
                              {
                                    Report = ReportName
                              })"
                       Parameters="@(new ParametersOptions { Editors = new EditorsOptions { MultiSelect = EditorType.ListView, SingleSelect = EditorType.ComboBox }})"
                       ScaleMode="@(ScaleMode.Specific)"
                       Scale="1.0"
                       EnableAccessibility="false" />
</div>

protected override async Task OnInitializedAsync()
{
    await _reportViewer1.SetReportSourceAsync(new ReportSourceOptions
        {
            Report = ReportName
        });
}

"DefaultHeaders": [
  {
    "Name": "TenantName",
    "Value": "TenantId"
  }
]

private static string _tenantId;
public CustomReportSourceResolver(IConfiguration configuration, IHttpContextAccessor context)
{
    _configuration = configuration;
    _contextAccessor = context;

    if (!string.IsNullOrEmpty(_contextAccessor.HttpContext.Request.Headers["TenantId"]))
    {
        _tenantId = _contextAccessor.HttpContext.Request.Headers["TenantId"];
    }
}

public ReportSource Resolve(string report, OperationOrigin operationOrigin, IDictionary<string, object> currentParameterValues)
{
    var tenantId = _contextAccessor.HttpContext.Request.Headers["TenantId"].ToString();

    var json = System.IO.File.ReadAllText($"{configurationsDirectory}\\database.json");

    Settings databaseSettings = JsonSerializer.Deserialize<Settings>(json);

    foreach (var tenant in databaseSettings.DatabaseSettings.TenantSettings)
    {
        if (tenant.TenantId == _tenantId)
        {
            _connectionString = tenant.ConnectionString;
        }
    }

    using (var conn = new NpgsqlConnection(_connectionString))
    {
        conn.Open();

        var sourceReportSource = new UriReportSource { Uri = $"{report}.trdp" };
        var reportSource = UpdateReportSource(sourceReportSource);

        return reportSource;
    }
}

builder.Services.AddHttpContextAccessor();
builder.Services.AddScoped<IReportSourceResolver, CustomReportSourceResolver>();
builder.Services.TryAddScoped<IReportServiceConfiguration>(sp =>
    new ReportServiceConfiguration
    {
        ReportingEngineConfiguration = sp.GetService<IConfiguration>(),
        HostAppId = "MyHostAppId",
        Storage = new FileStorage(),
        ReportSourceResolver = sp.GetService<IReportSourceResolver>()
    });

public class JobDto

{
    public string Id { get; set; }
    public string Name { get; set; }
    public int Number { get; set; }
    public string Type { get; set; }
    public string Status { get; set; }            
    public MetadataDto[] Metadata { get; set; } = Array.Empty<MetadataDto>();
}

public class MetadataDto
{
    public string Name { get; set; }
    public string Value { get; set; }
}

    var reportProcessor = new Telerik.Reporting.Processing.ReportProcessor();
    // set any deviceInfo settings if necessary
    var deviceInfo = new System.Collections.Hashtable();
    var reportSource = new Telerik.Reporting.UriReportSource();
    var directory = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
    var value = Convert.ToInt32(numericExportarPdf.Value);
    reportSource.Uri = "Report.trdp";
    reportSource.Parameters.Add("NRO_TICKET", value);
    Telerik.Reporting.Processing.RenderingResult result = reportProcessor.RenderReport("PDF", reportSource, deviceInfo);
    if (result.HasErrors) return;
    string fileName = result.DocumentName + "." + result.Extension;
    string path = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
    string filePath = Path.Combine(path, fileName);
    using FileStream fs = new FileStream(filePath, FileMode.Create);
    fs.Write(result.DocumentBytes, 0, result.DocumentBytes.Length);

Telerik.Reporting.Processing.CancelProcessingException: An error has occurred while processing the report. Processing canceled. Check the InnerException for more information.
 ---> System.Exception: Invalid value of report parameter 'NRO_TICKET'.
   --- End of inner exception stack trace ---
   at Telerik.Reporting.Processing.Report.ValidateParameters()
   at Telerik.Reporting.Processing.Report.ProcessItem()
   at Telerik.Reporting.Processing.ReportItemBase.ProcessElement()
   at Telerik.Reporting.Processing.Report.ProcessElement()
   at Telerik.Reporting.Processing.ProcessingElement.Process(IDataMember dataContext)
   at Telerik.Reporting.Processing.Report.Process(Boolean processItemActions, Boolean documentMapEnabled)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessReport(Report report, IPathResolver pathResolver, IProcessingContext parentContext, IEnumerable`1 parameters, Key rootKey, Boolean interactivityEnabled, Boolean documentMapEnabled, PageLayoutInfo pageSettings, ErrorEventHandler errorHandler, List`1 documentNodes, Boolean& documentMapAvailable)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessResolvedReports(ResolvedReportDocument resolvedReportDocument, IList`1 parameters, IProcessingContext contextPerDocument, Boolean interactivityEnabled, Boolean documentMapEnabled, PageLayoutInfo pageSettings, List`1 processedReports, ErrorEventHandler errorHandler, List`1 documentNodes, Boolean& documentMapAvailable, ListSlice& tocReportsSlice)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessReportSource(ReportSource reportSource, IRenderingContext context)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessReportSource(ReportSource reportSource, Hashtable deviceInfo, IRenderingContext context)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessAndRender(String format, ReportSource reportSource, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessAndRenderStateless(String format, ReportSource reportSource, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback)
   at Telerik.Reporting.Processing.ReportProcessor.<>c__DisplayClass47_0.<RenderReport>b__0(SingleStreamManager sm)
   at Telerik.Reporting.Processing.ReportProcessor.RenderReportSafe(Func`2 renderCallback, String format, IRenderingContext renderingContext)
   at Telerik.Reporting.Processing.ReportProcessor.RenderReport(String format, ReportSource reportSource, Hashtable deviceInfo, CancellationToken cancellationToken)
   at Telerik.Reporting.Processing.ReportProcessor.RenderReport(String format, ReportSource reportSource, Hashtable deviceInfo)