NullReferenceExeption when reading from a file
- by Whitey
I need to read a file structured like this:
01000
00030
00500
03000
00020
And put it in an array like this:
int[,] iMap = new int[iMapHeight, iMapWidth] {
{0, 1, 0, 0, 0},
{0, 0, 0, 3, 0},
{0, 0, 5, 0, 0},
{0, 3, 0, 0, 0},
{0, 0, 0, 2, 0},
};
Hopefully you see what I'm trying to do here. I was confused how to do this so I asked here on SO, but the code I got from it gets this error:
Object reference not set to an
instance of an object.
I'm pretty new to this so I have no idea how to fix it... I only barely know the code:
protected void ReadMap(string mapPath)
{
using (var reader = new StreamReader(mapPath))
{
for (int i = 0; i < iMapHeight; i++)
{
string line = reader.ReadLine();
for (int j = 0; j < iMapWidth; j++)
{
iMap[i, j] = (int)(line[j] - '0');
}
}
}
}
The line I get the error on is this:
iMap[i, j] = (int)(line[j] - '0');
Can anyone provide a solution? Thank you. :)
