If the XML structure you are creating is not valid XML, you see a TypeError run-time error.

The following example dynamically creates an XML object based on the values provided by the user for the tag name, attribute name, attribute value, and tag contents. The example checks for the TypeError condition by surrounding the XML initialization code with a try...catch block.

Example

 
    xmlns:mx="http://www.adobe.com/2006/mxml" 
    width="500" height="400"    
    initialize="createXML();"
>
    
        [CDATA[
            [Bindable]
            public var xml:XML
                        
            private function createXML():void

            {
                try 
                {
                    // Create the XML object using the values provided
                    // by the user for the tag name, attribute name,
                    // attribute value and the tag's contents. 
                    xml = 
                        <{tagName.text} 
                            {attributeName.text}={attributeValue.text}

                        >
                            {content.text}
                        {tagName.text}>;
                }
                catch (e:TypeError)

                {
                    // Type error encountered while trying to create the
                    // XML object. The form must not be valid. Inform 
                    // the user.
                    xml = <note>Fill the form to see the tag here.note>;
                }

            }
        ]]>
    
    
    
     
        title="Passing XML data by reference"
        layout="horizontal"
    >

        
             label="Tag name:">
                 id="tagName" change="createXML();"/>                
            

             label="Attribute name:">
                 id="attributeName" change="createXML();"/>

            
             label="Attribute value:">
                 id="attributeValue" change="createXML();"/>                
            

             label="Tag content:">
                 id="content" change="createXML();"/>                
            

            
             width="100%"/>
            
            
             
                editable="false" 
                width="300" height="50"
                text="{xml.toXMLString()}" 
            />