>Hi,
>
>Say I have text box (asp:textbox) on a page which has a RequiredFieldValidator so that the text box cannot be left blank.
>
>And then I have a validation method that checks if the user entry is valid; that is, if DB has this entry in the table. If user enters wrong value, the page says "Invalid Entry - blablabla".
>
>But the user can still click on Submit button. And since the RequiredFieldValidator will not stop it (some "bad" entry is in the text box), the Submit click method will fire. I want to prevent it.
>
>So, when the code validation method check for a valid entry (in code behind) and find that the entry is not valid, I want to set a flag that will prevent Submit to fire.
>
>How do you do it?

This is what I figured to be the solution (unless the gurus here will tell me otherwise). First, I didn't want to have the validation code firing twice, once when user enters something in the text box and another time in Submit click().

The form has a textbox which is set with the message "Entry Not Found" if user enters an invalid text. So, along with setting this text (Entry Not Found), I set the ForeColor of the textbox to Red. If the entry is found, I set it to the System default.
Then in the Submit Click method I check if the ForeColor of the textbox is Red. And if so, do not proceed with the code in the Submit click()