Count function

• Description
• Syntax
• Examples

Description

The count operator returns the number of rows in a form/formvariable.

Syntax

count(formname[<expression>])

Example

1. The following sample code, added to the on submit block, checks for uniqueness of a record. If the name specified in the form data already exists in the team_member form, the data is not submitted.

on submit
        {
        if (count(team_member[name == input.name])  >  0)
        {
        cancel  submit;
        }
        }

where,

team_member - is the name of the form.
team_member [name == input.name] - selects all the team_members whose name is equal to the name currently entered in the name field.
input.name - it is the value for the field "name" given by the user while submitting the form
count - count operator returns the number of team members whose name is equal to input.name

2. The following sample code, added to the on sumbit block, limits the number of records in a form.

on submit
        {
        if(count(Employee)>= 20)
        {
        alert("No more registrations allowed");
        cancel submit;
        }
        }

where,

Employee - is the name of the form
count - count operator returns the number of records in the Employee form.