ComboBox.TextUpdate Event

Use the TextUpdate event to validate the text before it is actually shown. TextUpdate is not fired if the Text property is programmatically changed.

For more information about handling events, see Consuming Events.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the TextUpdate 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 ComboBox named ComboBox1. Then ensure that the event handler is associated with the TextUpdate event.

private void ComboBox1_TextUpdate(Object sender, EventArgs e) {

   MessageBox.Show("You are in the ComboBox.TextUpdate event.");

}

.NET Framework

.NET Framework Client Profile

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference