How to use Tempdata to display the list - asp.net

Question

I have did the excel upload in dotnet core .I had to use tempdata to retrieve the details of the excel in list.Instead in my below code i had used Static object to retrieve the list.My code works as like this ,when i click on upload button it will display the details in the excel sheet.and when click on save it will save it to database and i need to edit in grid view using ajax call also .Help me out
My Action in controller is
public async Task<IActionResult> ImportEmployeeDetails(IFormFile excelfile)
{
try
{
EmployeesViewModelList employeesListObject = new EmployeesViewModelList();
List<EmployeeModel> employeesViewModelList = new List<EmployeeModel>();
if (excelfile == null || excelfile.Length == 0)
{
return View(employeesListObject);
}
var supportedTypes = new[] { ".xls", ".xlsx" };
var ext = Path.GetExtension(excelfile.FileName);
if (!supportedTypes.Contains(ext))
{
return View(employeesListObject);
}
var path = Path.Combine(
Directory.GetCurrentDirectory(), "wwwroot",
"EmployeeDetails.xlsx");
if (System.IO.File.Exists(path))
{
System.IO.File.Delete(path);
}
using (var stream = new FileStream(path, FileMode.Create))
{
await excelfile.CopyToAsync(stream);
}
FileInfo file = new FileInfo(path);
using (ExcelPackage package = new ExcelPackage(file))
{
ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
int rowCount = worksheet.Dimension.Rows;
int ColCount = worksheet.Dimension.Columns;
for (int i = 2; i <= rowCount; i++)
{
EmployeeModel emp = new EmployeeModel();
emp.EmployeeId = Convert.ToInt32(worksheet.Cells[i, 1].Value.ToString());
emp.EmpFirstName = worksheet.Cells[i, 2].Value.ToString();
employeesViewModelList.Add(emp);
}
employeesListObject.EmpModelList = employeesViewModelList;
return View(employeesListObject);
}
}
catch(Exception ex)
{
TempData["Message"] = "Opps! Something Went wrong!";
return RedirectToAction("ExcelPackage");
}
}

Answer 1

Try this, using your own list.
List<string> SomeList = new List<string>();
TempData["MyList"] = SomeList;
//then to get data just do
SomeList = TempData["MyList"] as List<string>; //This converts back to List<T>
Once you add the list to the TempData, you can retrive it from any Action or View in the same controller