The following example shows how you can validate strings using the static StringValidator.validateString() method.
Full code after the jump.
<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/03/13/validating-strings-using-the-stringvalidator-class/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">
<mx:Script>
<![CDATA[
import mx.utils.ObjectUtil;
import mx.controls.Alert;
private function doValidate(value:String):void {
var arr:Array = StringValidator.validateString(stringValidator, value);
textArea.text = ObjectUtil.toString(arr);
dataGrid.dataProvider = arr;
if (arr.length == 0) {
Alert.show("String is valid.");
}
}
]]>
</mx:Script>
<mx:StringValidator id="stringValidator"
minLength="3"
maxLength="6" />
<mx:ApplicationControlBar dock="true">
<mx:TextInput id="textInput" />
<mx:Button label="validate"
click="doValidate(textInput.text);" />
</mx:ApplicationControlBar>
<mx:TabNavigator id="tabNavigator"
creationPolicy="all"
width="100%"
height="100%">
<mx:VBox label="Grid"
width="100%"
height="100%">
<mx:DataGrid id="dataGrid"
variableRowHeight="true"
width="100%"
height="100%">
<mx:columns>
<mx:DataGridColumn dataField="errorCode" />
<mx:DataGridColumn dataField="errorMessage"
wordWrap="true" />
<mx:DataGridColumn dataField="isError" />
<mx:DataGridColumn dataField="subField" />
</mx:columns>
</mx:DataGrid>
</mx:VBox>
<mx:VBox label="Text"
width="100%"
height="100%">
<mx:TextArea id="textArea"
editable="false"
width="100%"
height="100%" />
</mx:VBox>
</mx:TabNavigator>
</mx:Application>
