Hi,
As
Christian Graus told you to pass your data through json to bind your datagird, you can refer
this[
^] article. it may help you.
Without postback you can not bind your datagrid from code behind. the only way is to update your grid information using json or may be you can use Update panel so you will not feel page refresh.
Hope above article helps you,
Thanks
-Amit Gajjar