Hi! I am creating a new app and in the username textbox I only want to allow letters, numbers and underscores. How can I do that? Thanks for your help!

You are lucky, I just opened the project [bild] Pattern what is allowed [^a-zA-Z 0-9/@%!"#?¨’_.,]

Only accept letters, numbers and underscores in a textbox

Boban (Boban Stojmenovic) August 18, 2020, 11:57am 5

Use regex, I think you can try the aia from this thread

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