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c# - 无法通过 NullReferenceException

转载 作者:行者123 更新时间:2023-11-30 14:32:30 25 4
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我是编程新手,尤其是 C#。我已经编写了一些代码,但在运行它时总是出现错误,在修复之前我无法继续。

有问题的错误是 NullReferenceException。它还告诉我“对象引用未设置到对象的实例”。

这似乎是一条非常明确的错误消息,表明对象尚未实例化。但是我认为我已经做到了。我希望有人可以向我解释我做错了什么。这是我的代码。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace EvenHelemaalOvernieuw
{
class Globals
{
public static int size = 50;
public static int factor = 3;
public static int puzzleNumber = 1;
public static Square[,] allSquares = new Square[Globals.factor * Globals.factor, Globals.factor * Globals.factor];
public static String path = @"" + factor.ToString() + "\\" + puzzleNumber.ToString() + ".txt";
public static int[,][,] values = new int[factor, factor][,];

public Globals() { }

public void setSize(int s)
{
size = s;
if (size > 100)
{
size = 100;
}
if (size < 20)
{
size = 20;
}
}

public void setFactor(int f)
{
factor = f;
if (factor > 5)
{
factor = 5;
}
if (factor < 2)
{
factor = 2;
}
}

public Square getSquare(int x, int y)
{
return allSquares[x, y];
}

public static void readPuzzle()
{
List<int> conversion = new List<int>();
int count = 0;
using (StreamReader codeString = new StreamReader(path))
{
String line = codeString.ReadToEnd();
Array characters = line.ToCharArray();
foreach (char a in characters)
{
if (a.ToString() != ",")
{
conversion.Add(Convert.ToInt32(a));
}
}
for (int panelX = 0; panelX < factor; panelX++)
{
for (int panelY = 0; panelY < factor; panelY++)
{
for (int squareX = 0; squareX < factor; squareX++)
{
for (int squareY = 0; squareY < factor; squareY++)
{
values[panelX, panelY][squareX, squareY] = conversion[count];
count++;
}
}
}
}
}
}
}
}

错误消息指示的行靠近底部,内容为 values[panelX, panelY][squareX, squareY] = conversion[count];

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