[flexcoders] Passing Object to MXML Component?

Wed, 30 Nov 2005 19:49:14 -0800

I am trying to pass an Object to an MXML Component in Flex 2 Alpha. It seems not to work. Your help is greatly appreciated. Here is the scenario:

 

1.

I have added an AS Class File “UserObject.as”. In the main application I create an instance of UserObject:

 

<mx:Script>

      <![CDATA[

            import rottmann.net.*;

            import flash.events.*;

            import mx.controls.*;

           

            private var userObject:UserObject;             

           

            private function init():Void

            {

                  userObject = new UserObject();

            }

 

The private init() function is triggered by the applications creationComplete event. Debugger indicates that the userObject gets successfully created.

 

2.

I have added an MXML Component “Login.mxml” which mainly contains a couple of Label and TextInput controls. At the beginning of this MXML Component I have added a private property to hold the UserObject:

 

<mx:Script>

      <![CDATA[

            import rottmann.net.*;

            import mx.controls.*;

            import mx.events.*;

 

            var u:UserObject;

 

 

3.

Now, back in the main application I use the MXML Component as follows:

 

<rottmann:Login u="{this.userObject}"/>

 

My assumption was, that the u=”{this.userObject}” passes the instance of my main application UserObject object to the MXML Component and inside the MXML Component I could access properties of this object via

 

u.getLastname();

etc.

 

However the Debugger tells me, that u is null in the MXML Component.

What’s going wrong?

 

Ralf Rottmann

 



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