I want to read the integers after the /. thats why i tried to use this code:
while ((line = file.ReadLine()) != null)
{
string[] ip = line.Split('/');
Console.WriteLine(ip[1]);
}
this code returns me this integers as string. I want to some math calculation with this numbers ,for example, multiplication. I tried this code but it doesnt work
int[] intArray = Array.ConvertAll(ip, int.Parse);
You are trying to convert each item of ip array to integer. At lease second item of it - "24 25 26 27" cannot be converted to single integer value. You should take this item of ip array, split it by white space and then parse each part to integer:
int[] intArray = ip[1].Split().Select(Int32.Parse).ToArray();
Or
int[] intArray = Array.ConvertAll(ip[1].Split(), Int32.Parse);
ip[1] item? Let me make question clear - you split line by /. That gives you ip array with second item having value like 24 25 26 27 and you want to convert this second item to array of integers?Split() without parameters or Split(' ')If its really about IP-Adresses, this might help
class IPV4Adress
{
public int BlockA {get; set;}
public int BlockB {get; set;}
public int BlockC {get; set;}
public int BlockD {get; set;}
public IPV4Adress(string input)
{
If(String.IsNullOrEmpty(input))
throw new ArgumentException(input);
int[] parts = input.Split(new char{',', '.'}).Select(Int32.Pase).ToArray();
BlockA = parts[0];
BlockB = parts[1];
BlockC = parts[2];
BlockD = parts[3];
}
public override ToString()
{
return String.Format("{0}.{1}.{2}.{3}",BlockA, BlockB, BlockC, BlockD);
}
}
Then read it from File:
IPV4Adress[] adresses = File.ReadLines(fileName).SelectMany(line=>line.Split('/')).Select(part => new IPV4Adress(part)).ToArray();
Given an array you can use the Array.ConvertAll method:
int[] myInts = Array.ConvertAll(arr, s => int.Parse(s));
(or)
int[] myInts = arr.Select(s => int.Parse(s)).ToArray();
(Or)
var converted = arr.Select(int.Parse)
A LINQ solution is similar, except you would need the extra ToArray call to get an array:
int[] myInts = arr.Select(int.Parse).ToArray();
iparray cannot be parsed as integer