THE WORLD'S LARGEST WEB DEVELOPER SITE

W3Data Controllers


What is a Controller?

A controller is a function you write to control your data.

With a self-written controller, you can modify data anyway you want.

You can:

  • Convert to upper case
  • Convert currencies
  • Calculate and Summarize
  • Round values
  • Substitute values
  • Change colors according to values
  • Anything else you are able to program

Adding a Controller

Adding a controller before displaying data, makes it possible to modify the data before they are displayed.

Example

// Add a controller to modify data before display
myController();

w3DisplayData("id01", myObject);

Controller Examples

Convert to Upper Case

function myController() {
  var i, x;
  var myArray = myObject["cd"];
  for (i = 0; i < myArray.length; i++) {
    myArray[i]["CustomerName"] =
    myArray[i]["CustomerName"].toUpperCase();
  }
}
Try It Yourself »

Summarize Price

function myController() {
  var i;
  var x;
  var total = 0;
  var myArray = myObject["cd"];
  for (i = 0; i < myArray.length; i++) {
    total += Number(myArray[i]["price"]);
  }
  myObject["total"] = total.toFixed(2);
}
Try It Yourself »