Dynamic textbox validation and data saving using Bloc & streams

[ATC]

Hi all

I am new to Flutter, I have following problem. I want to create dynamic textbox using flutter forms but How to handle validation and data submission using Streams & bloc. I use bloc pattern.

for eg: I have task name, start date & end date again user can create another group of fields from same interface and flutter interface will show another task name,start date & End date. User can create as many as forms field based on the task name, Here I am stuck with validation and form submission using bloc