Telerik RadGrid Issue

We have a requirement to update the RadGrid from JavaScript and partial page post back should happen.We have placed the button, RadGrid  everything inside an update panel.  we couldn’t get the RadGrid details from JavaScript by below code
Since we are using  Assembly="RadGrid.Net2" Namespace="Telerik.WebControls".

Currently we are using version RadControls for Asp.Net QC 2007  and the below highlighted code will work for Assembly="Telerik.Web.UI”

var masterTable= $find("<%= RadGrid1.ClientID%>").get_masterTableView();
masterTable. Rebind();

We tried few other approaches and
got stuck in between. Please help us to move further.

Approach 1:

We placed a hidden button and calling
the method to update the grid from JavaScript on button click event. Though the
button, RadGrid are inside update panel, post back is happening.

Approach 2:

Through xmlhttp request, sending
the request to code behind and updating the grid controls.

JavaScript:

xmlhttp. Open("POST",
url, true);

xmlhttp.send();



Code Behind:

RadGrid1.DataSource = <new datasource>;

RadGrid1.Rebind();



Also we have tried similar
approaches using PageMethods, XMLHttpRequest with Ajax call and XMLHttpRequest without Ajax call.



In all these approaches No post
back is happening and the new data source is also updated. we can see the
new values in debug mode but the Grid is not refreshed with new values.


Kindly do the needful with the
same version of Telerik control, in case we have to update the version, please
let us know the details.