Examples with ListBox:-

Add a new Form i.e.,FormListBox1 to the Windows Application WABasics

Create two labels,two textboxes  and one listBox & set the following properties to them

label1:      Text      : SelectedItem      Name   : lblItem label2:      Text     : SelectedIndex      Name   : lblIndex

textbox1:      Name   : txtItem textbox2:      Name   : txtIndex

listBox1:      Name   : lstSample Items         : Click on Ellipsis button this will open the StringCollectionEditor Enter Strings in the Collection click on Ok

Design :-

 

  

Generate theEventHandler for lstSample selectedIndexChanged  Event

& write the following code in Source[FormListBox1.cs] 

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WABasics {     public partial class FormListBox1 : Form     {         public FormListBox1()         {             InitializeComponent();         }         private void lstSample_SelectedIndexChanged(object sender, EventArgs e)         {             txtIndex.Text = lstSample.SelectedIndex.ToString();             txtItem.Text = lstSample.SelectedItem.ToString();         }             } }

Result :-

Add a new Form i.e.,FormListBox2 to the Windows Application WABasics

Create two labels,two textboxes  and one listBox ,six buttons & set the following properties to them

label1:      Text      : Enter Any Item      Name   : lblItem label2:      Text     : Enter Index value      Name   : lblIndex

textbox1:      Name   : txtItem textbox2:      Name   : txtIndex

listBox1:      Name   : lstSample

button1:      Text      : Add      Name   : btnAdd Button2:      Text      : Insert      Name   : btnInsert Button3:      Text      : Remove      Name   : btnRemove Button4:      Text      : RemoveAt      Name   : btnRemoveAt Button5:      Text      : Clear      Name   : btnClear Button6:      Text      : Close      Name   : btnClose

Design :-

Generate the EventHandlers  for btnAdd ,btnInsert,btnRemove,btnRemoveAt,btnClear,btnClose buttons Click Events

& write the following code in Source[FormListBox2.cs]

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WABasics {     public partial class FormListBox2 : Form     {         public FormListBox2()         {             InitializeComponent();         }         private void btnAdd_Click(object sender, EventArgs e)         {             lstSample.Items.Add(txtItem.Text);             foreach (Control ctrl in this.Controls)             {                 if (ctrl is TextBox)                 {                     ctrl.Text = "";                 }             }         }         private void btnInsert_Click(object sender, EventArgs e)         {                lstSample.Items.Insert(Convert.ToInt32(txtIndex.Text),txtItem.Text);         }         private void btnRemove_Click(object sender, EventArgs e)         {             lstSample.Items.Remove(txtItem.Text);         }         private void btnRemoveAt_Click(object sender, EventArgs e)         {             lstSample.Items.RemoveAt(Convert.ToInt32(txtIndex.Text));         }         private void btnClear_Click(object sender, EventArgs e)         {             lstSample.Items.Clear();         }         private void btnClose_Click(object sender, EventArgs e)         {             this.Close();         }         private void FormListBox2_Load(object sender, EventArgs e)         {         }             } }

Result :-