Flex:点击表格中的“确认”按钮,为什么页面显示没变呢
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
<fx:Declarations>
<!-- 将非可视元素(例如服务、值对象)放在此处 -->
</fx:Declarations>
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.controls.Alert;
//绑定表格用的数据
[Bindable]
private var arr:ArrayCollection = new ArrayCollection([
{neName:"教工路文一路路口相机_4", neType:"相机" , neAlarmType:"设备告警" , removeStatus:"未清除" , confirmStatus:"未确认" , neAlarmGrade:"2级"},
{neName:"学院路文一路路口相机_3", neType:"相机" , neAlarmType:"环境告警" , removeStatus:"未清除" , confirmStatus:"未确认" , neAlarmGrade:"3级"},
{neName:"文一路莫干山路路口相机_1", neType:"相机" , neAlarmType:"连接通信告警" , removeStatus:"未清除" , confirmStatus:"未确认" , neAlarmGrade:"1级"},
{neName:"文一路莫干山路路口相机_3", neType:"相机" , neAlarmType:"性能告警" , removeStatus:"未清除" , confirmStatus:"未确认" , neAlarmGrade:"4级"}
]);
//删除告警信息
public function deleteAlarmRecord():void{
arr.removeItemAt(alarmGrid.selectedIndex);
}
//确认告警信息
public function confirmAlarmInfo():void{
arr.getItemAt(alarmGrid.selectedIndex).confirmStatus = "已确认";
alarmGrid.dataProvider=arr;
}
]]>
</fx:Script>
<s:DataGrid id="alarmGrid" width="600" height="285" requestedRowCount="4" dataProvider="{arr}">
<s:columns>
<s:ArrayList>
<s:GridColumn dataField="neName" headerText="名称"></s:GridColumn>
<s:GridColumn dataField="neType" headerText="类型"></s:GridColumn>
<s:GridColumn dataField="removeStatus" headerText="清除状态"></s:GridColumn>
<s:GridColumn dataField="confirmStatus" headerText="确认状态"></s:GridColumn>
<s:GridColumn headerText="操作">
<s:itemRenderer>
<fx:Component>
<s:GridItemRenderer>
<s:HGroup>
<mx:LinkButton toolTip="清除" label="清除" click="outerDocument.deleteAlarmRecord();" textDecoration="underline" color="#2066CF" fontWeight="normal"/>
<mx:LinkButton toolTip="确认" label="确认" click="outerDocument.confirmAlarmInfo()" textDecoration="underline" color="#2066CF" fontWeight="normal"/>
</s:HGroup>
</s:GridItemRenderer>
</fx:Component>
</s:itemRenderer>
</s:GridColumn>
</s:ArrayList>
</s:columns>
</s:DataGrid>
</s:Application>
为什么点击“确认”后,被点击行显示的仍然是“未确认”,而不是"已确认"呢?更改值之后应该不用再重新设置dataProvider了吧?就算我重设了dataProvider也不行,求解
yushi
11 years, 3 months ago
Answers
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
<fx:Declarations>
<!-- 将非可视元素(例如服务、值对象)放在此处 -->
</fx:Declarations>
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
//绑定表格用的数据
[Bindable]
private var arr:ArrayCollection = new ArrayCollection([
{neName:"教工路文一路路口相机_4", neType:"相机" , neAlarmType:"设备告警" , removeStatus:"未清除" , confirmStatus:"未确认" , neAlarmGrade:"2级"},
{neName:"学院路文一路路口相机_3", neType:"相机" , neAlarmType:"环境告警" , removeStatus:"未清除" , confirmStatus:"未确认" , neAlarmGrade:"3级"},
{neName:"文一路莫干山路路口相机_1", neType:"相机" , neAlarmType:"连接通信告警" , removeStatus:"未清除" , confirmStatus:"未确认" , neAlarmGrade:"1级"},
{neName:"文一路莫干山路路口相机_3", neType:"相机" , neAlarmType:"性能告警" , removeStatus:"未清除" , confirmStatus:"未确认" , neAlarmGrade:"4级"}
]);
//删除告警信息
public function deleteAlarmRecord():void
{
arr.removeItemAt(alarmGrid.selectedIndex);
}
//确认告警信息
public function confirmAlarmInfo(item:Object):void
{
item.confirmStatus = "已确认";
arr.itemUpdated(item);
}
]]>
</fx:Script>
<s:DataGrid id="alarmGrid" width="600" height="285" requestedRowCount="4" dataProvider="{arr}">
<s:columns>
<s:ArrayList>
<s:GridColumn dataField="neName" headerText="名称"></s:GridColumn>
<s:GridColumn dataField="neType" headerText="类型"></s:GridColumn>
<s:GridColumn dataField="removeStatus" headerText="清除状态"></s:GridColumn>
<s:GridColumn dataField="confirmStatus" headerText="确认状态"></s:GridColumn>
<s:GridColumn headerText="操作">
<s:itemRenderer>
<fx:Component>
<s:GridItemRenderer>
<s:HGroup>
<mx:LinkButton toolTip="清除" label="清除" click="outerDocument.deleteAlarmRecord();" textDecoration="underline" color="#2066CF" fontWeight="normal"/>
<mx:LinkButton toolTip="确认" label="确认" click="outerDocument.confirmAlarmInfo(data)" textDecoration="underline" color="#2066CF" fontWeight="normal"/>
</s:HGroup>
</s:GridItemRenderer>
</fx:Component>
</s:itemRenderer>
</s:GridColumn>
</s:ArrayList>
</s:columns>
</s:DataGrid>
</s:Application>
只是改变了对象的值,并没有通知控件更新,所以没有变化。
这种问题一般就两个思路,一是如上面代码所示,修改值之后手动通知组件更新;二是把组件的属性与对象的值绑定,通过对象的public方法来修改其属性值。
我是老司机
answered 11 years, 3 months ago