在C＃中从文本文件中提取特定数据

Question

I have a .txt file in my project which has the following contents:

Mode: 1
Number of candidates: 64
serial number: 111111101
room number: 111111111
score_1: 0
score_2: 0
Total: 0

I read all the lines and store it in an array using the following.

string[] lines = File.ReadAllLines("file.txt", Encoding.UTF8);

I want to extract only the values of each line, eg for the line with the "room number", I want to extract only "111111111" without the space and print it on console and save it in a variable. How do I do that using C#?

Answer 1

Are you looking for Substring and IndexOf ?

 string[] values = lines
   .Select(line => line.Substring(line.IndexOf(':') + 1).TrimLeft())
   .ToArray();

If you want to preserve names (eg Mode , score_2 etc.) try Split :

 KeyValuePair<string, string>[] data = lines
   .Select(line => line.Split(new char[] {':'}, 2))
   .Where(items => items.Length >= 2) // let's filter out lines without colon
   .Select(items => new KeyValuePair<string, string>(items[0], items[1].TrimLeft()))
   .ToArray();