Ext.define("MyApp.view.view1", {
    extend: "Ext.Panel",
    ...

{
    xtype: "fieldset",
    docked: "top",
    items: [
        {
            xtype: "datepickerfield",
            label: "Дата",
            value: new Date(),
            dateFormat: "d.m.Y",
            id: "Date1",
            required: true
        },
    ...

var PanelData = new Ext.FormPanel({
    region: 'center',
    url: ...
    frame: true,
    monitorValid: true,
    ...

... ... ...

//Вот так загружаю данные с Сервера
PanelData.load({
    timeout: TimeOutDefault,
    waitMsg: lanLoading,
    success: function (result) {
    ...