MVC, uploading CSV, int.Parse(), “Input string was not in a correct format.”

Question

I know that this has been asked before and I have tried my best to find an answer that could help me with my problem - but with no succes. I apoligize for the duplicated question but I hope you still want to help me out.

Thanks in advance!

I have made a solution where I can upload a csv file into my sql database. When I run the code, choose the file and presses "Upload" I get the following error: "Input string was not in a correct format."

The error is being thrown in my controller at; LearningNumbers.LearningNumberId = int.Parse(values[0]);

My CSV

LearningNumberId;Note;Activity;Price
1;Node1;her er node 1;22
2;Node1;her er node 2;33

My model:

namespace MTH_SQL.Model
{
    public class LearningNumberRecord
    {
        [Key]
        public int LearningNumberId { get; set; }
        public string Note { get; set; }
        public string Activity { get; set; }
        public int Price { get; set; }

    }
}

My controller:

namespace MTHoejgaard.Controllers
{
public class HomeController : Controller
{
    private MTHoejgaardContext db = new MTHoejgaardContext();
    public ActionResult Index()
    {
        return View();
    }

    [HttpPost]
    public ActionResult Index(HttpPostedFileBase File)
    {
        if (File != null && File.ContentLength > 0)
        {
            StreamReader csvReader = new StreamReader(File.InputStream);
            {
                string inputLine = "";
                while ((inputLine = csvReader.ReadLine()) != null)
                {
                    string[] values = inputLine.Split(new Char[] { ';' });
                    LearningNumberRecord LearningNumbers = new LearningNumberRecord();
                    LearningNumbers.LearningNumberId = int.Parse(values[0]);  // <-- IT THROWS THE ERROR HERE
                    LearningNumbers.Note = values[1];
                    LearningNumbers.Activity = values[2];
                    LearningNumbers.Price = int.Parse(values[3]);
                    db.LearningNumbers.Add(LearningNumbers);
                    db.SaveChanges();
                }
                csvReader.Close();
            }
        }
        return RedirectToAction("Index");
    } 
}

My View:

@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    <input type="file" name="File" id="File" />
    <input type="submit" name="Submit" value="Upload" />
    <span>@ViewBag.Message</span>
}

Answer 1

Change your CSV file to this (first line removed):

1;Node1;her er node 1;22
2;Node1;her er node 2;33

Alternatively, jump the first line when parsing the file.