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Control.FontChanged Event

Occurs when the Font property value changes.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public:
event EventHandler^ FontChanged {
	void add (EventHandler^ value);
	void remove (EventHandler^ value);
}
/** @event */
public void add_FontChanged (EventHandler value)

/** @event */
public void remove_FontChanged (EventHandler value)

JScript supports the use of events, but not the declaration of new ones.

This event is raised if the Font property is changed by either a programmatic modification or through interaction.

For more information about handling events, see Consuming Events.

The following code example is an event handler that is executed when the Text property value changes. The Control class has several methods with the name pattern PropertyNameChanged that are raised when the corresponding PropertyName value changes (PropertyName represents the name of the corresponding property).

The following code example changes the ForeColor of a TextBox displaying currency data. The example converts the text to a decimal number and changes the ForeColor to Color.Red if the number is negative and to Color.Black if the number is positive. This example requires that you have a Form that contains a TextBox.

private:
   void currencyTextBox_TextChanged( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      try
      {
         // Convert the text to a Double and determine if it is a negative number.
         if ( Double::Parse( currencyTextBox->Text ) < 0 )
         {
            // If the number is negative, display it in Red.
            currencyTextBox->ForeColor = Color::Red;
         }
         else
         {
            // If the number is not negative, display it in Black.
            currencyTextBox->ForeColor = Color::Black;
         }
      }
      catch ( Exception^ ) 
      {
         // If there is an error, display the text using the system colors.
         currencyTextBox->ForeColor = SystemColors::ControlText;
      }
   }

private void currencyTextBox_TextChanged(Object sender, EventArgs e)
{
    try {
        // Convert the text to a Double and determine if it is a 
        // negative number.
        if (System.Double.Parse(currencyTextBox.get_Text()) < 0) {
            // If the number is negative, display it in Red.
            currencyTextBox.set_ForeColor(Color.get_Red());
        }
        else {
            // If the number is not negative, display it in Black.
            currencyTextBox.set_ForeColor(Color.get_Black());
        }
    }
    catch (System.Exception exp) {
        // If there is an error, display the text using the system colors.
        currencyTextBox.set_ForeColor(SystemColors.get_ControlText());
    }
} //currencyTextBox_TextChanged

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0
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