RefreshEventHandler
Delegate
Definition
public delegate void RefreshEventHandler(RefreshEventArgs e);
Parameters
- e
A RefreshEventArgs that contains the component or Type that changed.
- Inheritance
Examples
The following sample demonstrates how to use a RefreshEventHandler delegate to handle the Refreshed event when a type or component changes. In the code, the OnRefreshed event handles the event and displays the component being changed.
The code assumes that a TextBox control is already sited on the form.
private:
void Form1_Load( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
textBox1->Text = "changed";
System::ComponentModel::TypeDescriptor::Refreshed += gcnew System::ComponentModel::RefreshEventHandler( OnRefresh );
System::ComponentModel::TypeDescriptor::GetProperties( textBox1 );
System::ComponentModel::TypeDescriptor::Refresh( textBox1 );
}
protected:
static void OnRefresh( System::ComponentModel::RefreshEventArgs^ e )
{
Console::WriteLine( e->ComponentChanged );
}
private void Form1_Load(object sender, System.EventArgs e)
{
textBox1.Text = "changed";
System.ComponentModel.TypeDescriptor.Refreshed += new
System.ComponentModel.RefreshEventHandler(OnRefresh);
System.ComponentModel.TypeDescriptor.GetProperties(textBox1);
System.ComponentModel.TypeDescriptor.Refresh(textBox1);
}
protected static void OnRefresh(System.ComponentModel.RefreshEventArgs e)
{
Console.WriteLine(e.ComponentChanged.ToString());
}
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
TextBox1.Text = "changed"
AddHandler System.ComponentModel.TypeDescriptor.Refreshed, AddressOf OnRefreshed
System.ComponentModel.TypeDescriptor.GetProperties(TextBox1)
System.ComponentModel.TypeDescriptor.Refresh(TextBox1)
End Sub
Private Sub OnRefreshed(ByVal e As System.ComponentModel.RefreshEventArgs)
Console.WriteLine(e.ComponentChanged.ToString())
End Sub
Remarks
When you create a RefreshEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event handler delegates, see NIB: Events and Delegates.