Index Out of Bound exception while rendering RDLC Reports in ASP.NET Core - asp.net-core

Question

My ASP.NET Core MVC project has several reports. To render the reports as PDF, I'm using AspNetCore.Reporting library.
This library works fine for a single report but due to some cache issues it throws an exception while generating another report. The solution I found on the internet was to run report generation as a new process but I don't know how to implement that.
I found the suggestion to use Tmds.ExecFunction to run report generation as a seperate process. But I dont know how to pass parameters to the function.
Here is my code:
string ReportName = "invoiceDine";
DataTable dt = new DataTable();
dt = GetInvoiceItems(invoiceFromDb.Id);
Dictionary<string, string> param = new Dictionary<string, string>();
param.Add("bParam", $"{invoiceFromDb.Id}");
param.Add("gParam", $"{salesOrderFromDb.Guests}");
param.Add("tParam", $"{invoiceFromDb.Table.Table}");
param.Add("dParam", $"{invoiceFromDb.Time}");
param.Add("totalP", $"{invoiceFromDb.SubTotal}");
param.Add("t1", $"{tax1}");
param.Add("t2", $"{tax2}");
param.Add("tA1", $"{tax1Amount}");
param.Add("tA2", $"{tax2Amount}");
param.Add("AT1", $"{totalAmountWithTax1}");
param.Add("AT2", $"{totalAmountWithTax2}");
param.Add("terminalParam", $"{terminalFromDb.Name}");
param.Add("addressParam", $"{t.Address}");
param.Add("serviceParam", "Service Charges of applicable on table of " + $"{personForServiceCharges}" + " & Above");
var result = reportService.GenerateReport(ReportName, param, "dsInvoiceDine", dt);
return File(result,"application/Pdf");
This is my version of the function:
``` public byte[] GenerateReport(string ReportName, Dictionary<string,string> Parameters,string DataSetName,DataTable DataSource )
{
string guID = Guid.NewGuid().ToString().Replace("-", "");
string fileDirPath = Assembly.GetExecutingAssembly().Location.Replace("POS_Website.dll", string.Empty);
string ReportfullPath = Path.Join(fileDirPath, "\\Reports");
string JsonfullPath = Path.Join(fileDirPath,"\\JsonFiles");
string rdlcFilePath = string.Format("{0}\\{1}.rdlc", ReportfullPath, ReportName);
string generatedFilePath = string.Format("{0}\\{1}.pdf", JsonfullPath, guID);
string jsonDataFilePath = string.Format("{0}\\{1}.json", JsonfullPath, guID);
File.WriteAllText(jsonDataFilePath, JsonConvert.SerializeObject(DataSource));
FunctionExecutor.Run((string[] args) =>
{
// 0 : Data file path - jsonDataFilePath
// 1 : Filename - generatedFilePath
// 2 : RDLCPath - rdlcFilePath
ReportResult result;
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
Encoding.GetEncoding("windows-1252");
LocalReport report = new LocalReport(args[2]);
DataTable dt = JsonConvert.DeserializeObject<DataTable>(File.ReadAllText(args[0]));
report.AddDataSource(args[3], dt);
result = report.Execute(RenderType.Pdf, 1,Parameters);
using (var fs = new FileStream(args[1], FileMode.Create, FileAccess.Write))
{
fs.Write(result.MainStream);
}
}, new string[] {jsonDataFilePath, generatedFilePath, rdlcFilePath, DataSetName });
var memory = new MemoryStream();
using (var stream = new FileStream(Path.Combine("", generatedFilePath), FileMode.Open))
{
stream.CopyTo(memory);
}
File.Delete(generatedFilePath);
File.Delete(jsonDataFilePath);
memory.Position = 0;
return memory.ToArray();
}
But it throws exception "Field marshaling is not supported by ExecFunction" on line:
var result = reportService.GenerateReport(ReportName, param, "dsInvoiceDine", dt);

Answer 1

No Need to run report generation as a seperate process. Just Dont Pass extension as 1
in:
var result = localReport.Execute(RenderType.Pdf, 1, param);
The Solution is:
int ext = (int)(DateTime.Now.Ticks >> 10);
var result = localReport.Execute(RenderType.Pdf, ext, param);