Split text file into several parts by character - vb.net

Question

I apologise in advance if there is already an answer to this problem; if so please just link it (I have looked, btw! I just didn't find anything relating to my specific example) :)
I have a text (.txt) file which contains data in the form 1.10.100.0.200 where 1, 10, 100, 0 and 200 are numbers storing the map terrain layout of a game. This file has multiple lines of 1.10.100.0.200 where each line represents an item of terrain in the map.
Here is what I would like to know:
How do I find out how many lines there are, so I know how many items of terrain to create when I read the map file?
What is the method I should use to get each of 1, 10, 100, 0 and 200:
E.g. when I am translating the file into a map terrain at runtime I might use the terrainitem1.Location = New Point(x, y) or terrainitem1.Size = New Size(p, q) commands, where x, y, p and q are integers or doubles relating to the terrain's location or size. Where would I then find x, y etc. out of 1, 10, 100, 0 and 200, if say x is equal to 1, y to 10 and so on?
I am sorry if this isn't clear, please just ask me and I'll try to explain.
N.B. I am using VB.NET WinForms

Answer 1

There is no way to know how many lines a file has without opening the file and reading its contents.
You didn't indicate how far you've got on this. Do you know how to open a file?
Here's some basic code to do what you want. (Sorry, this is C# but the idea is the same in VB.)
string line;
using (TextReader reader = File.OpenText(#"C:\filename.txt"))
{
// Read each line from the file (until null returned)
while ((line = myTextReader.ReadLine()) != null)
{
// Get each number in line (as string)
string[] values = line.Split(new[] { '.' }, StringSplitOptions.RemoveEmptyEntries);
// Convert each number to integer
id = int.Parse(values[0]);
height = int.Parse(values[1]);
width = int.Parse(values[2]);
x = int.Parse(values[3]);
y = int.Parse(values[4]);
}
}