ListBox Control (Visual C#)

ListBox Control (Visual C#)

Code: Determining the Selected Item in a ListBox Control (Visual C#)

Visual Studio .NET 2003

This example determines which item has been selected in a Windows Forms ListBox control.

Example:

private void Form1_Load(object sender, System.EventArgs e)

{

listBox1.Items.Add("One");

listBox1.Items.Add("Two");

listBox1.Items.Add("Three");

}

private void listBox1_SelectedIndexChanged(object sender, System.EventArgs e)

{

if ((string)listBox1.SelectedItem == "Two")

MessageBox.Show((string)listBox1.SelectedItem);

}

Compiling the Code

This example requires:

• A form named Form1 with a ListBox control named listBox1. Set Form1's Load event handler to Form1_Load. Set listBox1's SelectedIndexChanged event handler to listBox1_SelectedIndexChanged.

Note This can also be used with a ComboBox control by substituting a ComboBox control named comboBox1 for the ListBox control and changing the code from listBox1 to comboBox1.