this.spListItemStore = new Ext.data.Store({
            model: 'SPListItem',
            sorters: [
                {
                    property: 'Name',
                    direction: 'ASC'
                }
            ],
            proxy: {
                type: 'ajax',
                reader: 'json',
                url: '../../Service.svc/SharePoint/GetListItems?' + me.getRandom(),
                extraParams: {
                    siteUrl: DDASConfig.SiteUrl,
                    listName: DDASConfig.ListName,
                    documentLibraryName: docLibName,
                    userName: sessionStorage.getItem("UserName"),
                    password: sessionStorage.getItem("PassWord")
                }
            }
        });