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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

// Added 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();
  }
}
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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 »