UpDownBase.OnTextBoxLostFocus(Object, EventArgs) Method
Definition
Important
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Raises the LostFocus event.
protected:
virtual void OnTextBoxLostFocus(System::Object ^ source, EventArgs ^ e);protected virtual void OnTextBoxLostFocus (object source, EventArgs e);protected virtual void OnTextBoxLostFocus (object? source, EventArgs e);abstract member OnTextBoxLostFocus : obj * EventArgs -> unit
override this.OnTextBoxLostFocus : obj * EventArgs -> unitProtected Overridable Sub OnTextBoxLostFocus (source As Object, e As EventArgs)Parameters
- source
- Object
The source of the event.
Remarks
This method validates the text in the text box portion of the control when the spin box (also known as an up-down control) loses focus.
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnTextBoxLostFocus method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Notes to Inheritors
When overriding OnTextBoxLostFocus(Object, EventArgs) in a derived class, be sure to call the base class's OnTextBoxLostFocus(Object, EventArgs) method so that registered delegates receive the event.
