or
var dataSourceStatistics = new kendo.data.DataSource({ transport: { read: { data: { f:'getCustomerStats', fromDate:function () { return "2012-01-01"; }, toDate:function () { return "2012-06-19"; }, custStats:null } }, update: { } }, schema: { data: function(data) { return data.result.custStats.Record; }, total: function(data) { return data.result.custStats.Record.length; }, model:{ id: "EmployeeId", fields: { Employee: { editable: false }, EmployeeId: { editable: false }, ValueCandE: { type: "number", defaultValue: 0 }, ValueE: { type: "number", defaultValue: 0 }, ValueEandCandM: { type: "Number" }, ValueEandM: { type: "Number" } } } }});