Witam. Chcę skonwertować liczby w zapisanym pliku txt. Napotykam jednak pewien problem :
ArgumentNullException was unhandled
An unhandled exception of type 'System.ArgumentNullException' occurred in mscorlib.dll
Dodatkowo zamiast wyświetlić normalnej liczby w konsoli wyświetla się:
System.Collections.Generic.List'1(System.Int32)
Proszę o pomoc.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace HomeworkLINQ
{
class Program
{
static void Main(string[] args)
{
FileWritting.FileWrite();
LINQTester.FileRead();
}
}
}
--------klasa --------
using System;
using System.Collections.Generic;
using System.Data.SqlTypes;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
namespace HomeworkLINQ
{
class FileWritting
{
public static void FileWrite()
{
FileStream fileStream = new FileStream("Data.txt", FileMode.Create, FileAccess.Write);
StreamWriter streamWriter = new StreamWriter(fileStream);
streamWriter.WriteLine("1");
streamWriter.WriteLine("5");
streamWriter.WriteLine("9");
streamWriter.WriteLine("-100");
streamWriter.WriteLine("0");
streamWriter.WriteLine("100");
streamWriter.WriteLine("1");
streamWriter.WriteLine("54");
streamWriter.WriteLine("1000");
streamWriter.WriteLine("-4");
streamWriter.WriteLine("-5");
streamWriter.WriteLine("-4");
streamWriter.WriteLine("100");
streamWriter.WriteLine("32");
streamWriter.WriteLine("20");
streamWriter.WriteLine("19");
streamWriter.WriteLine("99");
streamWriter.Close();
fileStream.Close();
}
}
}
-----klasa2-------
using System;
using System.Collections.Generic;
using System.Data.SqlTypes;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
namespace HomeworkLINQ
{
class LINQTester
{
public static void FileRead()
{
FileStream fileStream = new FileStream("Data.txt", FileMode.Open, FileAccess.Read);
StreamReader streamReader = new StreamReader(fileStream);
for (int i = 0; i <= NumberOfLines(); i++)
{
var Dane = new List<int>();
Dane.Add(int.Parse(streamReader.ReadLine())); // w tej pętli zachodzi błąd
Console.WriteLine(Dane);
}
streamReader.Close();
fileStream.Close();
}
public static int NumberOfLines()
{
int number = 0;
foreach (string line in File.ReadLines("Data.txt"))
{
if (line != String.Empty) ++number;
}
return number;
}
}
}