How to handle the TextChanged event only when the user stops typing?

I have a TextBox with a TextChanged event wired up. In the end it is making a query to a SQL database, so I want to limit the number of queries.

I only want to make the query if the user hasn't pressed a key in say .. 300 milliseconds or so. If for some reason the previous query is still executing, I would need to cancel that, and then issue a new query.

Which event is generated when TextBox text is changed?

The event handler is called whenever the contents of the TextBox control are changed, either by a user or programmatically. This event fires when the TextBox control is created and initially populated with text.

How does TextChanged work?

The TextChanged event is raised when the content of the text box changes between posts to the server. The event is only raised if the text is changed by the user; the event is not raised if the text is changed programmatically.

Create a System.Windows.Forms.Timer and reset it (e.g. stop then start it) after every keypress. If the timer event is triggered, disable the timer.