Variables in a loop

Question

I was wondering whether there\'s a way in a \"for\" loop to assign a value to a string variable named according to its index number?

let\'s say I have 3 string varia

Answer 1

If you declare your variable in a class as public variables, you can access them as follow;

public partial class _Default : System.Web.UI.Page
{
    public string message1 = null;
    public string message2 = null; 
    public string message3 = null;


    public void setVars()
    {
        for (int i = 1; i <=3; i++)
         {
             this.GetType().GetField("message" + i.ToString()).SetValue(this, "blabla" + i.ToString());

         }
    }




}

Answer 2

I would go about it a little differently, maybe use a dictionary and store your messages. Something like this:

 Dictionary<string, string> messages = new Dictionary<string, string>();
 for(int i = 1; i <= 3; i++)
 {
      messages.Add("message" + i.ToString(), i.ToString());
 }

Answer 3

You don't want 3 variables with the same name, you want an array of those variables.

string[] messages = new string[3]; // 3 item array

You can then store your items in the array elements

messages[0] = "Apple"; // array index starts at 0!
messages[1] = "Banana";
messages[2] = "Cherry"; 

Another way to create that array is an inline array initializer, saves some code

string[] messages = { "Apple", "Banana", "Cherry" }; 

(Note: there are more valid syntaxes for array initialization. Research on the various other methods is left as an exercise.)

And access them via a loop (foreach)

foreach (string fruit in messages)
{
    Console.WriteLine("I'm eating a " + fruit);
}

Or for

for (int i = 0; i < messages.Length; i++)
{
    Console.WriteLine("I'm eating a " + messages[i]); // reading the value
    messages[i] = "blabla" + i.ToString(); // writing a value to the array
}