How do you add null validation to text box?

[Rahim]

When the user leaves the text box empty and presses the enter button it lets the user enter nothing to the list.I want it to show a message and not let them show nothing

[Taifun]

@Rahim

When the user leaves the text box empty and presses the enter button it lets the user enter nothing to the list.I want it to show a message

Use an if statement

If is empty Textbox.Text
Then Display message
Else do the processing

You can find the is empty block in the text drawer

Taifun