Programming in Delphi. Lesson 13.2. Block try except end, library DateUtils, component TreeView
Hello, dear Delphi programmers. In this video, I will tell you about the try except end block, which is used to handle errors. If an error occurs in the code between the try and except lines, then the code specified between except and end will be executed. In the except..end block, you can even see what kind of error occurred and react differently to different exceptional situations. But I will tell you about this a little later. For now, general information.
As always, for example, we will create a new mini-application. This time, as new components, we will take TreeView, and also consider the standard DateUtils library.
We will also analyze the form handler that is triggered before it is closed - OnCloseQuery. With its help, we can allow or not allow the form to close.