Get Data from GridPanel and insert it to DataTable using c#

[AbdallahAshour]

How i can get data from GridPanel using c#
and convert it or put it into DataTable



I do not know the names of the columns

[AbdallahAshour]

send from java script to C# Method

in JavaScript

var GridPanelData = Sys.Serialization.JavaScriptSerializer.serialize(E xt.getCmp('GridPanelID').getRowsValues());
App.direct.ConvertToDataTable(GridPanelData );

in C#

[DirectMethod()]
ConvertToDataTable(string GridPanelData ){

DataTable dtprint = Ext.Net.JSON.Deserialize<DataTable>(GridPanelData) ;

}