Get value of current node on table is exception null

Dear Masters,

Based on guideline http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/10c2c440-7f8c-2b10-7db0-dce34360f118?QuickLink=index&overridelayout=true&34514357351154

I create and show data on table. But when clicking the linktoaction to get detail data, I cannot get value from on current node and the value variable returns null

Z_Esrce_Send_Pdf_Portal_Input input=new Z_Esrce_Send_Pdf_Portal_Input(new Create_eCofc_Model());

wdContext.nodeZ_Esrce_Send_Pdf_Portal_Input().bind(input);

String value=wdContext.currentI_Search_1BElement().getPrueflos();

wdContext.currentZ_Esrce_Send_Pdf_Portal_InputElement().setP_Prueflos(value);

Please review and give your thoughts.

Thanks