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Listbox

TerraliminusTerraliminus Posts: 5Member
[b][red]This message was edited by Terraliminus at 2003-7-1 2:54:51[/red][/b][hr]
I am having some problems with the listbox control in C#. I want to log everything that happends in the listbox and therefore I need some kind of onChange event. I can't however find any event that works!

I'm adding items to the listbox like Listbox.Items.Add()

So every time that happends an event has to be triggered, I'd think the ontext event should work, but it does nothing. Am I doing something wrong?




Comments

  • yuvalyuval Posts: 13Member
    [b][red]This message was edited by yuval at 2003-7-1 8:29:18[/red][/b][hr]

    Try this

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

    namespace onLIstBoxChanged
    {
    ///
    /// Summary description for Form1.
    ///
    public class Form1 : System.Windows.Forms.Form
    {

    private System.Windows.Forms.ListBox listBox2;
    ///
    /// Required designer variable.
    ///
    private System.ComponentModel.Container components = null;

    public Form1()
    {
    //
    // Required for Windows Form Designer support
    //
    InitializeComponent();

    //
    // TODO: Add any constructor code after InitializeComponent call
    //
    }

    ///
    /// Clean up any resources being used.
    ///
    protected override void Dispose( bool disposing )
    {
    if( disposing )
    {
    if (components != null)
    {
    components.Dispose();
    }
    }
    base.Dispose( disposing );
    }

    #region Windows Form Designer generated code
    ///
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    ///
    private void InitializeComponent()
    {

    this.listBox2 = new System.Windows.Forms.ListBox();
    this.SuspendLayout();

    //
    // listBox2
    //
    this.listBox2.Location = new System.Drawing.Point(88, 176);
    this.listBox2.Name = "listBox2";
    this.listBox2.Size = new System.Drawing.Size(136, 56);
    this.listBox2.TabIndex = 2;
    this.listBox2.SelectedIndexChanged += new System.EventHandler(this.listBox2_SelectedIndexChanged);
    //
    // Form1
    //
    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(292, 266);
    this.Controls.AddRange(new System.Windows.Forms.Control[] {
    this.listBox2,
    this.button1});
    this.Name = "Form1";
    this.Text = "Form1";
    this.Load += new System.EventHandler(this.Form1_Load);
    this.ResumeLayout(false);

    }
    #endregion

    ///
    /// The main entry point for the application.
    ///
    [STAThread]
    static void Main()
    {
    Application.Run(new Form1());
    }

    private void Form1_Load(object sender, System.EventArgs e)
    {
    for (int i=0; i<6;++i)
    listBox2.Items.Add ("Item "+ (i+1).ToString());

    }


    private void listBox2_SelectedIndexChanged(object sender, System.EventArgs e)
    {
    MessageBox.Show (listBox2.Text);
    }
    }
    }


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