ListBox Events: SelectedIndexChanged, SelectedValueChanged, DataSourceChanged, DisplayMemberChanged, ValueMemberChanged : ListBox « GUI Windows Forms « C# / CSharp Tutorial

Home
C# / CSharp Tutorial
1.Language Basics
2.Data Type
3.Operator
4.Statement
5.String
6.struct
7.Class
8.Operator Overload
9.delegate
10.Attribute
11.Data Structure
12.Assembly
13.Date Time
14.Development
15.File Directory Stream
16.Preprocessing Directives
17.Regular Expression
18.Generic
19.Reflection
20.Thread
21.I18N Internationalization
22.LINQ
23.GUI Windows Forms
24.Windows Presentation Foundation
25.Windows Communication Foundation
26.Workflow
27.2D
28.Design Patterns
29.Windows
30.XML
31.XML LINQ
32.ADO.Net
33.Network
34.Directory Services
35.Security
36.unsafe
C# / CSharp Tutorial » GUI Windows Forms » ListBox 




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

public class Employee

  public string ID;
  public string Name ;

  public  Employee(string strName, string strID)
  {
     this.ID = strID;
     this.Name = strName;
  }

  public override string ToString()
  {
     return this.ID + " : " this.Name;
  }


public class Form1 : System.Windows.Forms.Form
{
  private System.Windows.Forms.GroupBox groupBox1;
  private System.Windows.Forms.RadioButton rbAuthors;
  private System.Windows.Forms.RadioButton rbEmployees;
  private System.Windows.Forms.ListBox lb;

  private DataTable dataTable;
    private ArrayList Employees = new ArrayList();

  private System.ComponentModel.Container components = null;

  public Form1()
  {
    InitializeComponent();

    lb.Items.Add("A");
    lb.Items.Add("B");
    lb.Items.Add("C");
    lb.Items.Add("D");
    lb.Items.Add("E");

    lb.SelectedIndex = 0;

    // populate the arraylist for later use.
        Employees.Add(new Employee("A""1"));
        Employees.Add(new Employee("B""2"))
        Employees.Add(new Employee("C""3"));
        Employees.Add(new Employee("D""4"));
        Employees.Add(new Employee("E""5"));
        Employees.Add(new Employee("F""6"));
        Employees.Add(new Employee("G""7"));
  }

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

  private void InitializeComponent()
  {
    this.lb = new System.Windows.Forms.ListBox();
    this.groupBox1 = new System.Windows.Forms.GroupBox();
    this.rbEmployees = new System.Windows.Forms.RadioButton();
    this.rbAuthors = new System.Windows.Forms.RadioButton();
    this.groupBox1.SuspendLayout();
    this.SuspendLayout();
    // 
    // lb
    // 
    this.lb.Location = new System.Drawing.Point(168);
    this.lb.Name = "lb";
    this.lb.Size = new System.Drawing.Size(232212);
    this.lb.TabIndex = 0;
    this.lb.DisplayMemberChanged += new System.EventHandler(this.lb_DisplayMemberChanged);
    this.lb.ValueMemberChanged += new System.EventHandler(this.lb_ValueMemberChanged);
    this.lb.DataSourceChanged += new System.EventHandler(this.lb_DataSourceChanged);
    this.lb.SelectedValueChanged += new System.EventHandler(this.lb_SelectedValueChanged);
    this.lb.SelectedIndexChanged += new System.EventHandler(this.lb_SelectedIndexChanged);
    // 
    // groupBox1
    // 
    this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                    this.rbEmployees,
                                                    this.rbAuthors});
    this.groupBox1.Location = new System.Drawing.Point(16240);
    this.groupBox1.Name = "groupBox1";
    this.groupBox1.TabIndex = 1;
    this.groupBox1.TabStop = false;
    this.groupBox1.Text = "DataSource";
    // 
    // rbEmployees
    // 
    this.rbEmployees.Location = new System.Drawing.Point(2456);
    this.rbEmployees.Name = "rbEmployees";
    this.rbEmployees.TabIndex = 1;
    this.rbEmployees.Text = "Employee\'s";
    this.rbEmployees.CheckedChanged += new System.EventHandler(this.rb_CheckedChanged);
    // 
    // rbAuthors
    // 
    this.rbAuthors.Checked = true;
    this.rbAuthors.Location = new System.Drawing.Point(2432);
    this.rbAuthors.Name = "rbAuthors";
    this.rbAuthors.TabIndex = 0;
    this.rbAuthors.TabStop = true;
    this.rbAuthors.Text = "Authors";
    this.rbAuthors.CheckedChanged += new System.EventHandler(this.rb_CheckedChanged);
    // 
    // Form1
    // 
    this.AutoScaleBaseSize = new System.Drawing.Size(513);
    this.ClientSize = new System.Drawing.Size(264389);
    this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                             this.groupBox1,
                                             this.lb});
    this.Name = "Form1";
    this.Text = "Form1";
    this.Load += new System.EventHandler(this.Form1_Load);
    this.groupBox1.ResumeLayout(false);
    this.ResumeLayout(false);

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

  private void rb_CheckedChanged(object sender, System.EventArgs e)
  {
    lb.DataSource = Employees;
    lb.DisplayMember = "Name";
    lb.ValueMember = "ID";
  }

  private void lb_SelectedIndexChanged(object sender, System.EventArgs e)
  {
    MessageBox.Show(lb.SelectedIndex.ToString()"\n" + lb.GetItemText(lb.SelectedItem),"lb_SelectedIndexChanged");    
  }

  private void lb_SelectedValueChanged(object sender, System.EventArgs e)
  {
    MessageBox.Show(lb.GetItemText(lb.SelectedItem),"lb_SelectedValueChanged");    
  }

  private void lb_DataSourceChanged(object sender, System.EventArgs e)
  {
    MessageBox.Show(lb.DataSource.ToString()"lb_DataSourceChanged");    
  }

  private void lb_DisplayMemberChanged(object sender, System.EventArgs e)
  {
    MessageBox.Show(lb.DisplayMember.ToString()"lb_DisplayMemberChanged");    
  }

  private void lb_ValueMemberChanged(object sender, System.EventArgs e)
  {
    MessageBox.Show(lb.ValueMember.ToString()"lb_ValueMemberChanged");    
  }

  private void Form1_Load(object sender, System.EventArgs e)
  {
    this.lb.SelectedValueChanged += new System.EventHandler(this.lb_SelectedValueChanged);
    this.lb.SelectedIndexChanged += new System.EventHandler(this.lb_SelectedIndexChanged);
  }
}














23.27.ListBox
23.27.1.Set the TopIndex property of the ListBox to ensure the most recently added items are visibleSet the TopIndex property of the ListBox to ensure the most recently added items are visible
23.27.2.Add Items to ListBoxAdd Items to ListBox
23.27.3.Add ContextMenu to ListBoxAdd ContextMenu to ListBox
23.27.4.ListBox Items AddListBox Items Add
23.27.5.ListBox Items Add a RangeListBox Items Add a Range
23.27.6.ListBox Selection ModeListBox Selection Mode
23.27.7.Use RadioButton to control ListBox selection modeUse RadioButton to control ListBox selection mode
23.27.8.ListBox Events: SelectedIndexChanged, SelectedValueChanged, DataSourceChanged, DisplayMemberChanged, ValueMemberChanged
23.27.9.Add text in the TextBox to the ListBox
23.27.10.Fills a ListBox with data from Database
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.