CheckBox.CheckedChanged Event


Occurs when the value of the Checked property changes.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public event EventHandler CheckedChanged

For more information about handling events, see Handling and Raising Events.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the CheckedChanged event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a project that contains an instance of type CheckBox named CheckBox1. Then ensure that the event handler is associated with the CheckedChanged event.

private void CheckBox1_CheckedChanged(Object sender, EventArgs e) {

   MessageBox.Show("You are in the CheckBox.CheckedChanged event.");


.NET Framework
Available since 1.1
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