User Guide

376 Components Dictionary

Example

The following code tests whether a sort named “nameSort” exists. If the sort already exists, it

is made the current sort by means of

DataSet.useSort(). If a sort by that name doesn’t exist,

one is created by means of

DataSet.addSort(). To test this example, drag a DataSet

component and a List component to the Stage, and give them instance names of

my_ds and

my_list respectively. Add a binding between the dataProvider property of the DataSet

component and the

dataProvider property of the List component by using the Bindings tab

of the Component inspector. Create two properties in the schema of

my_ds DataSet by using

the Schema tab of the Component inspector:

name (data type: String) and years (data type:

Number). Add the following code on Frame 1 of the main timeline:

import mx.data.components.datasetclasses.DataSetIterator;

my_list.labelField = "name";

my_ds.addItem({name:"Milton", years:3});

my_ds.addItem({name:"Mark", years:3});

my_ds.addItem({name:"Sarah", years:1});

my_ds.addItem({name:"Michael", years:2});

my_ds.addItem({name:"Frank", years:2});

if (my_ds.hasSort("nameSort")) {

my_ds.useSort("nameSort");

} else {

my_ds.addSort("nameSort", ["name"], DataSetIterator.Descending);

}