Confirmation before closing

Question

net windows form application. I have a combo box and a text box and a close window button. Now If I make any change in the combo box or textbox and click on the close window button, it should prompt the user to save the modifications.. If no modification are made ( The user will just run the application, doesnt make any modification) then it should not prompt the user. It should close directly.. How can I do this?

Answer 1

An easy way to do it is by adding a dirty member to the form, which I set to true whenever anything changes and then check it whenever the form is closing .

Answer 2

Override the OnClosing method of your form (or attach to the Closing event). In the handler check for modifications and display a message box to the user. If you do not want the form to close just set the e.Cancel property to false before returning.