Questions

Question

1. How can i save in an array something so i can use it in the future? 2. how can i print a few records from the array 3. how can i delete a record from the array? please give examples so i can understand

fawzan mohamed · Answer

Better option to save something is to go for a text file or DB.

Julia · Answer

ok i'll take a look.... thank you both...

Sam Hobbs · Answer

Go to this web site's home page and look at the articles and tutorials there. There are very many useful and educational artilces. My aticle Using CSV and Other Delimited Files in C# shows one way to read and write data but there are many more. There are many ways to write data and read it back in. You can use simple strings in separate records as Vulpes shows. You can use a delimited text format such as CSV as in my article. You can use XML and you can use a database. There are many articles for all of that for you to read and study.

Vulpes · Answer

This is how to save the array elements to a file and then load them back in again: using System; using System.IO; class Program { static void Main() { // create and initialize string array with 3 elements string[] array = {Red Green Blue}; // print first and third elements note that indexing starts from 0 Console.WriteLine(array[0]); Console.WriteLine(array[2]); // you can't delete an element from the array but you can set it to null array[1] = null; Console.WriteLine(array[1]); // save array elements to file array[1] = Orange; File.WriteAllLines(julia.txt array); // load them back to a different array string[] array2 = File.ReadAllLines(julia.txt); foreach(string color in array2) Console.WriteLine(color); Console.ReadKey(); } }

Julia · Answer

you didn't tell me about how i can save for instance 3 records. I want to don't lose them when i close the console....

Vulpes · Answer

This short program should (hopefully) answer your questions: using System; class Program { static void Main() { // create and initialize string array with 3 elements string[] array = {Red Green Blue}; // print first and third elements note that indexing starts from 0 Console.WriteLine(array[0]); // Red Console.WriteLine(array[2]); // Blue // you can't delete an element from the array but you can set it to null array[1] = null; Console.WriteLine(array[1]); // (Blank) Console.ReadKey(); } } If you want to create a dynamic array (i.e. one that can change its size as new elements are added and from which you can delete elements) then you should use an ArrayList or a generic List instead.