working with Array

[Goong]

Hello,

I have a form with a button and a text box. What I am trying to do is when I click the button, the text box shows the first item of my array, then each time I click the button, the textbox updates with the next item of the array until the end and then start again.

My code so far is

Private Sub btnnext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnnext.Click

        Dim x As New ArrayList
        Dim i As Integer
        Dim s As Object

        ' Add items to array list.
        x.Add("A")
        x.Add("B")
        x.Add("C")
        x.Add("D")
        x.Add("E")
        x.Add("F")
        x.Add("G")
        x.Add("H")
        x.Add("I")
        x.Add("J")

        
        For i = 0 To x.Count - 1
            txtArray1.Text = (x(i))
        Next

Any help appreciated
Thanks
Goong

[sde]

you probably want to create your array outside of the click event.

also outside the button click event, you probably want to create an integer variable which represents the current value.

after you have those in place, you will increrment the integer variable inside the click event.

you may want to put some extra logic inside the click even which makes sure the integer value does not exceed the total amount of elements in the array.

this is just logic, .. sorry i don't code vb that well.

good luck.

[sde]

ok, i needed a break from work. this is done in c#, but maybe you can follow the logic and re-write it.

this is just a windows application with 1 text box and 1 button.

keep in mind that arrays in c# are 0 based. if i remember correctly, VB arrays start on 1.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace Test
{
	public class Form1 : System.Windows.Forms.Form
	{
		// declare your arraylist and current value here
		private ArrayList x;
		private int currentValue = 0;

		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.TextBox textBox1;
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			InitializeComponent();

			// setup your arraylist
			x = new ArrayList();
			x.Add("A");
			x.Add("B");
			x.Add("C");
			x.Add("D");
			x.Add("E");
			x.Add("F");
			x.Add("G");
			x.Add("H");
			x.Add("I");
			x.Add("J");
			x.Add("K");
			x.Add("L");
			x.Add("M");
			x.Add("N");
			x.Add("O");
			x.Add("P");
			x.Add("Q");
			x.Add("R");
			x.Add("S");
			x.Add("T");
			x.Add("U");
			x.Add("V");
			x.Add("W");
			x.Add("X");
			x.Add("Y");
			x.Add("Z");

			// print the current value to the text box
			this.textBox1.Text = x[currentValue].ToString();
		}

		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		private void InitializeComponent()
		{
			this.button1 = new System.Windows.Forms.Button();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(32, 32);
			this.button1.Name = "button1";
			this.button1.TabIndex = 0;
			this.button1.Text = "button1";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(120, 32);
			this.textBox1.Name = "textBox1";
			this.textBox1.TabIndex = 1;
			this.textBox1.Text = "";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(292, 266);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.button1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			// increment the current value by 1
			currentValue++;

			// if the current value is higher than the amount of
			// items in your array, set it to 0
			if(currentValue >= x.Count)
			{
				currentValue = 0;
			}

			// print the current value to the text box
			this.textBox1.Text = x[currentValue].ToString();
		}
	}
}

hope that helps.

[Goong]

Thanks sde
Code works great. My understanding of handling array data is limited