EasyuiCombobox三级联动

有许多刚接触Easyui中Combobox控件的朋友可能都会遇到的问题：如何将Combobox做成三级联动?

现分享一个三级联动的案例给大家参考参考，经测试能通过。注意Combobox绑定的数据是Json格式

 $(function () {
                var project1 = $("#project1").combobox({
                    url: 'Project_Select.ashx?flg=0',
                    editable: false,
                    valueField: 'ID',
                    textField: 'projectname',
                    editable: false, //不允许手动输入
                    onSelect: function (record) {
                        project2.combobox({
                            disabled: false,
                            url: 'Project_Select.ashx?flg=' + record.ID,
                            editable: false,
                            valueField: 'ID',
                            textField: 'projectname'
                        }).combobox('clear');
                    }
                });
                var project2 = $("#project2").combobox({
                    disabled: true,
                    editable: false,
                    valueField: 'ID',
                    textField: 'projectname',
                    onSelect: function (record) {
                        project3.combobox({
                            disabled: false,
                            url: 'Project_Select.ashx?flg=' + record.ID,
                            editable: false,
                            valueField: 'ID',
                            textField: 'projectname'
                        }).combobox('clear');
                    }
                });
                var project3 = $("#project3").combobox({
                    disabled: true,
                    editable: false,
                    valueField: 'ID',
                    textField: 'projectname'
                });
            });