Control nol going to java code

HI..
I am facing a problem. I am doing validation for fileuploader in java. I am able to do the validation in java. But the requirement is to do the validation in java (page code). When i am passing empty string and do a submit, its working fine i.e the contol is going fine to the page code. But when I give some blank string to the fileuploader field and do a submit. The control is not going to the page code.
Please help me in the regard. Its very urgent
Regards
Rishab

Can you elaborate with short examples. When you say "going to java code" I assume you mean either trigger a ValueChangeEvent or a Invoke Application event.
My assumption is that the blank is not triggering a ValueChangeEvent. If data does not change then Invoke Application will not be called either.

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    HI..
    I am facing a problem. I am doing validation for fileuploader in java. I am able to do the validation in java. But the requirement is to do the validation in java (page code). When i am passing empty string and do a submit, its working fine i.e the contol is going fine to the page code. But when I give some blank string to the fileuploader field and do a submit. The control is not going to the page code.
    Please help me in the regard. Its very urgent
    Regards
    Rishab

    What is the difference between an empty string and a blank string? And what JSF component are you talking about? Tomahawk t:inputFileUpload? RISB risb:multiFileUpload? Custom component? Why do you need the control in the backing bean? If you want to validate it on being filled or not, generally just add required="true" to the component.

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