NumericUpDown.ValueChanged Event

 

Occurs when the Value property has been changed in some way.

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

public event EventHandler ValueChanged

For the ValueChanged event to occur, the Value property can be changed in code, by clicking the up or down button, or by the user entering a new value that is read by the control. The new value is read when the user hits the ENTER key or navigates away from the control. If the user enters a new value and then clicks the up or down button, the ValueChanged event will occur twice.

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 ValueChanged 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 NumericUpDown named NumericUpDown1. Then ensure that the event handler is associated with the ValueChanged event.

private void NumericUpDown1_ValueChanged(Object sender, EventArgs e) {

   MessageBox.Show("You are in the NumericUpDown.ValueChanged event.");

}

.NET Framework
Available since 1.1
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