Input values into an array from a windows application

Question

Is there a way to input values into an array from a textbox by clicking a button? I would like to add a value to the next element in the array with each new click of a button on the windows application form. Currently each time I click the button all variables are set to 0 and the first element in the array is always being rewritten.

marcfromm · Answer

It worked great. Thanks for all the help.

bilnaad · Answer

The problem is very simple. It all has to do with variable scope ^_^ You declared the ArrayList in a method. So this means that the ArrayList will be kept alive only till the end of the method. So when the method exits the ArrayList is gone. It just doesn't exist anymore. And when you execute the method another time variable numbers is initialized to an empty ArrayList. To keep the ArrayList alive don't declare it in a methods scope but in the objects scope. In your case the Form. public class MyForm : Form { private ArrayList numbers = new ArrayList(); public MyForm() { //blah blah blah.....

marcfromm · Answer

I switched the static array to and arrayList. buttonAccept_Click grabs the current value from the textBoxNumber and adds it to the arrayList. When buttonAccept_Click is activated by a new button click on the form, everything resets and the first element in the array is written over by the new number in the textBoxNumber. private void buttonAccept_Click(object sender, System.EventArgs e) { int pick; ArrayList numbers = new ArrayList(); pick = int.Parse(textBoxEnterNumber.Text); numbers.Add(pick); textBoxMessages.Text += pick.ToString()+ " " + "
"; printArrayList(numbers); } private void printArrayList(ArrayList numbers) { foreach (int number in numbers) { textBoxMessages.Text = number.ToString()+"
"; } }

bilnaad · Answer

What's the code you using to add the values to the array? I'm sure the problem is easy to fix... So if you could show what is happening the fatser you will have the solution.

marcfromm · Answer

Will an araylist prevent the reinitializing of variables each time I click the button? This is my problem, index is never increased, it is always set back to zero with each click of the button. Is there a way to increment index with each click of the button?

bilnaad · Answer

If you use a static array[] you should keep count of the inputs index. To make it easier for yourself use the ArrayList.

Input values into an array from a windows application

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Answers (6)