What's the purpose of Winforms controls tags?

Question

I see a 'Tag' property in the design view for most WinForms controls. I have never used this tag and want to know why I would want to use it.

Answer 1

Its a general "catch-all" for additional data you wish to store with a control.

I too have never used it.

Answer 2

for example you have a lot of buttons with single method handling clicks. then at handler you have do differentiate them from each other. So you put some sort of id (or reference) and then access it there.

Answer 3

It allows you to store some of your own data with a control. It mostly useful in tree controls where you might want each node/leaf to have some extra data associated with it. This way when you click on a node you can perform an action relevant to the node.

Answer 4

We perform heavy use of tags. We have some methods for checking input, and these methods checks whats in the tags in order to know what control to perform.

IE: if a textbox has RQ=1;DT=int;MAX=100

the automatic method knows that this text can not be left blank, that should accept only integers within 0 and 100. We have a complete seudo declarative language for this.

Kind of useful!

More specific for your question, Tags are for your use.