Additive color mixing begins with black and ends with white; as more color is added, the result is lighter and tends to white. The RGB colors are light primaries and colors are created with light. Percentages of red, green, & blue light are used to generate color on a computer screen.
In shell scripting we often need to check if file or directory exists and take appropriate action. This post show you how to check it and how this check use in your script. For checking we will use file test operators -f for file and -d for directory, which return TRUE if file or directory exists. And here is output of the script.
FirstName, LastName,UserName, Password etc etc. So, when the user fill ups this Form, when he is entering Username. It should check automatically that this username Exists or not. when user is entering in textbox, it should check the database.and displays a message in label.if its already exists in Database, it must show already exists(Someone already choosed, Try another). Please give me good solution for this problem. Thanks.5 And a simple way: Select * from [User] where UserName = 'The user Name'. Ubaid ur Rahman IT at 9-Jul-12 6:03am. Boss, I need to check the Users Check Availability from Database, whether its Exists of not. Please help me.