Extension data not showing in order.jsp & order_change.jsp

Question

Hi Experts,
My requirement is to display the gross weight of the order in Order.jsp,Order_change.jsp. I have implemented the BADI CRM_ISA_BASKET_HEAD and method GETHEAD_GET_DATA to get the gross weight.
In the BADI I am using CRM_ORDER_READ to get the value gross weight of the order.
Here is the code to get the extension data in Order.jsp
<input class="textInput" 
            type="text"
            name="ZGRWT"
            value="<%= JspUtil.encodeHtml(ui.header.getExtensionData("ZGRWT")) %>"/>
Not sure after doing this both order.jsp & order_change.jsp simply not displying any thing in the page.
To get the extension data should I write any custom action? Not sure about the issue.

Answer 1

Hello sirivaram!
I think you should use custom action.
You can do it like this:
1) create custom action class extended BaseAction
2) in this class you should pass values from ExtensionData to request.
3) use request attributes instead extensionData() on the jsp page
4) do not forget register your action before standart ShowBasketAction in config.xml
My last message Re: Display String Variable on ISA JSP page, that gets value from Z java class. can help you with points 2 and 3.
For point 4 you have to replace this code in file config.xml:
<action path="/b2b/showbasket" type="com.sap.isa.isacore.action.order.ShowBasketAction">
<forward name="showbasket" path="/b2b/order.jsp"/>
</action>
with this code:
<action path="/b2b/showbasket" type="foo.bar.Z_ShowBasketAction">
<forward name="success" path="/b2b/z_showbasket.do"/>
</action>
<action path="/b2b/z_showbasket" type="ru.sng.isa.isacore.action.order.Z_ExtShowBasketAction">
<forward name="showbasket" path="/b2b/order.jsp"/>
</action>
About your issue - I suppose that ui.header can't have to access to ExtensionData or ui.header.getExtensionData("ZGRWT") return null. Anyway you will be able to debug your application and check value of ExtensionData only if you will take your own action.
Hope this helps.
Regards, Lev