There are various forms that are created in order to obtain the required data, however the problem appears in calibration of the users so that the data which is received remains homogeneous and only a specific type of data is required to be provided. Input controls are very important in order to restrict the interactions within forms. The control provides an effective approach in order to add a name attribute along with a restricted form element due to which the input within the form can be controlled in an adequate manner. There are various parameters which may require a restriction e.g. the initial value of an object element may be something and the input value may require.
There can also be interrelated values that can impact a given form, which means the one particular selection or data entry can lead to a change in the type of data which has to be entered in the forthcoming section of a form, thus in similar requirements and input control works is an excellent tool and provides the Webmaster with the power to control all the data which is entered by user. Although there are various types of controls which are available, however it would be important to discuss the once which are mostly used within a form.
Buttons
Buttons are usually based on events which are handled by on-click activities, and they are always associated with an internal action which is performed after there is a click on the button with a specific value. Submit buttons carry value and initiate the submission of data into a specific database. A format contain more than one submit button in order to equip the form to submit data into different databases for the purpose of providing convenience of segregation.
Similarly, reset buttons provide the user with the facility to initiate a process which results in all the controls or form sections to go back to their initial values.Push buttons on the other hand carry a customized value which usually depends upon the client side scripts which define the actual elements and attributes and also create the manner in which these buttons behave once pushed.
Checkboxes
Checkboxes are on-off switches which can be toggled by the user and are used in order to control the attribute which is set. Checkboxes can also be conditional and may require further information is checked or unchecked, on the basis of requirement of a particular form.
Radio Buttons
Radio buttons are also similar to check boxes and can be toggled by the user as they have an on-off system. These buttons are usually used in order to obtain choices from the users if there are only two answers that can be given or are required for a particular question.
Text/Numeric Inputs
There are various types of inputs which may be required as a part of the form, however the data which required they specifically need either only text or numbers and therefore it is important to use text/numeric input control in order to restrict the users to submit data which is either text or number, according to the requirements.
Application of Input Control in systems analysis and development / data models
Input control systems are widely used commercially in order to develop inputs which can be segregated into a meaningful data which is further used for system analysis and development of data models. The input controls are extremely useful to define attributes of data which is received through a particular form and the data is used in order to assign specific values which are used for analysis on the basis of their particular value defined by the user.
The data models which are created specifically for the use of a particular application, there is an attempt to control the type of data which is received by these models through input control. All the attributes which are assigned to each data which can be visually seen by user gets into related to the data which is placed in the database and one particular data can have multiple interrelations so that their relationships are also identified and can be defined as and when required.
Input Control: Case Study
Mentioned below is the database model which is controlled using input control to user forms. There are two basic parts of the form, the first part which is visible to the user is where he is restricted to put the information according to the requirement of the input control and the other part is the allocation of data bus the overall activity takes place.
The database model shows any, is form where the customer is required to provide his personal details, order details, system generated order ID and needs to choose products which further decide the pricing of the order. The customer gets an input form on the first page where he's supposed to enter the details of his company, contact, title, city, postcode, country, phone, fax. Now, there are controls which are set over the data the company name can be alphanumeric, contact should only be numeric, title can only be chosen among the options provided, city name has to be chosen from the list which is available, postcode has to be numeric only. With the input controls in place, the data which is provided the customer will remain the same and will be in the same format as required.
Similarly, as soon as the customer provides his customer ID and enters the numeric data he immediately gets all the related data in the form which is pulled from the database. The product IDs which are selected for procurement by the customer are restricted according to the product codes so that the customer now may not end up selecting the wrong item hence a restricted input is applicable here.
Conclusion
Input control is an extremely important aspect of system analysis and data model as it helps a programmer to control the kind of input which is received through a user and this enables the overall system to have a specific kind of a dataset which can be properly placed within a dataset and can be defined through homogeneous or heterogeneous relationships.
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