from data should not clear

Question

i am developing an application, in the applicatioin i am trying to enter some data using a popup window, after entering the data i clicked the button add or save after adding the data to datagrid in parent window it should display last entered the data  in the popupwindow and data to be display in the parent window without closing the popup window , i tried but when i close the popup window it adds the data to parent window datagrid

 

please help me