get Client side Control's value on the Server side

, ,
1

Hi,

I have a client side control Drop Down menu. It’s value is set by a variable in the beforeRenderResponse() service.

My requirement is that

  • When user selects any value from that drop down, I want to get the value of that control in the server side function executed by Async command.

I have added client side selection change listener for the Drop down and that executes my async command.

I have tried many ways to get the value of the control on the server side, but I have failed.

I like to know the syntex to get value of client control on server side.

Thanks,
Jaimin Patel

2

There are two very easy ways of doing this, neither of which require any javascript or client side coding.

Method one: Member variable
This is the most straight forward technique where you add a member variable to the PageBean and in your Command Handler access the variable directly.

To use this technique:

  1. Add a member variable to your Page Bean and a public getter/setter
  2. Bind the Value property of the Drop Down control to the member variable.

Method two: Control Accessor
This method removes the need for creating a member variable, but you need to cast the result of a method call to your data type.

To use this technique:

  1. In the CAF Page Editor, right click on the Drop Down Control and choose Source → Create Control Accessor. This will create a new java method.
  2. In your Command Handler function, call the getter that was created in step one and call getValue()

Please see the attached project for a demonstration of both techniques.
Regards,
–mark
DropDownValue.zip (11.8 KB)

1 Like
3

Hi Mark,

Which approach would you follow? Could you please explain why?

Thanks,
Bruno