![]() ![]() Set the control names as shown in the table below.Open a new project called "OnlineForm" and create an interface like the one illustrated below.To demonstrate some simple validation techniques, we will create a data entry form of the type typically found on a web page. There are many ways in which validation can be carried out, and it is down to analysts and software developers to decide what kind of validation is required and how to implement it. Value entered check - used for things like required fields in online forms where the user must enter some data (for example their name or telephone number) and must not leave the field blank.a minimum order quantity, or the maximum number of books someone can borrow from a library at one time). Limit check - used for numeric values that must either be greater than or equal to some lower limit, or less than or equal to some upper limit (e.g.Range check - often used for numeric values that must fall within a pre-defined range of values (for example, permitted operating temperatures, a person's age, or a valid day of the month).The same principle can be applied to things like credit card or bank account numbers, where a specific minimum number of digits is expected and non-numeric characters (usually) not permitted. Programs often expect dates to be entered in a very specific format (e.g. Format check - this sort of check is often applied to things like dates.If an integer value is expected, floating-point values (or any other non-integer values) will not be accepted. Type check - the data entered must be of the correct datatype.For example, a telephone number may include the digits 0-9, and the non-numeric characters "+" and "-", as well as spaces and brackets. ![]()
0 Comments
Leave a Reply. |