Apache flex 在Flex中从DataGrid删除选定行
我使用ItemRenderer在DataGrid中添加了一个复选框。我已经在下面粘贴了我正在使用的代码 我在DataGrid之外还有一个按钮，当点击这个按钮时，我想删除所有有复选框的行。有人能告诉我怎么做吗？嗨 首先，您的代码无法正常工作，因为并非每个DataGrid行都有自己的ItemRenderer实例。对于具有n个可见行的DataGrid，正好有n个项目呈现器实例。如果您创建的DataGrid不能容纳所有数据，然后选择一些行并向上/向下滚动DataGrid，您可以很容易地检查这一点。你会看到意想不到的结果 其中一种解决方案可能是选择其他字段，或者在resultArray项属性中选择任何您想要命名的字段。然后可以通过ItemRenderer的数据对象访问此属性。检查以下代码：Apache flex 在Flex中从DataGrid删除选定行,apache-flex,actionscript-3,datagrid,Apache Flex,Actionscript 3,Datagrid,我使用ItemRenderer在DataGrid中添加了一个复选框。我已经在下面粘贴了我正在使用的代码 我在DataGrid之外还有一个按钮，当点击这个按钮时，我想删除所有有复选框的行。有人能告诉我怎么做吗？嗨 首先，您的代码无法正常工作，因为并非每个DataGrid行都有自己的ItemRenderer实例。对于具有n个可见行的DataGrid，正好有n个项目呈现器实例。如果您创建的DataGrid不能容纳所有数据，然后选择一些行并向上/向下滚动DataGrid，您可以很容易地检查这一点。你会看
<?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:Script>
<![CDATA[
import mx.collections.ArrayCollection;
[Bindable]
private var resultArray:ArrayCollection = new ArrayCollection
([
{firstName:"1-1",lastName:"1-2",city:"1-3",empCode:"1-4"},
{firstName:"2-1",lastName:"2-2",city:"2-3",empCode:"2-4"},
{firstName:"3-1",lastName:"3-2",city:"3-3",empCode:"3-4"},
{firstName:"4-1",lastName:"4-2",city:"4-3",empCode:"4-4"},
{firstName:"5-1",lastName:"5-2",city:"5-3",empCode:"5-4"},
{firstName:"6-1",lastName:"6-2",city:"6-3",empCode:"6-4"},
{firstName:"7-1",lastName:"7-2",city:"7-3",empCode:"7-4"},
{firstName:"8-1",lastName:"8-2",city:"8-3",empCode:"8-4"},
{firstName:"9-1",lastName:"9-2",city:"9-3",empCode:"9-4"},
{firstName:"10-1",lastName:"10-2",city:"10-3",empCode:"10-4"},
]);
protected function button1_clickHandler(event:MouseEvent):void
{
for (var i:int=0; i< resultArray.length; i++)
{
if (resultArray[i].selected == true)
{
resultArray.removeItemAt(i);
}
}
dgEmployeeInfo.invalidateList();
}
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<s:VGroup>
<mx:DataGrid id="dgEmployeeInfo" dataProvider="{resultArray}" x="131" y="95" editable="false">
<mx:columns>
<mx:DataGridColumn headerText="Select" rendererIsEditor="true" editorDataField="selected">
<mx:itemRenderer>
<fx:Component>
<mx:HBox>
<s:CheckBox id="testChk" click="testChk_clickHandler(event)" selected="{data.selected}">
<fx:Script>
<![CDATA[
[Bindable]
public var cbSelected:Boolean;
protected function testChk_clickHandler(event:MouseEvent):void
{
data.selected = testChk.selected;
}
]]>
</fx:Script>
</s:CheckBox>
</mx:HBox>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="First Name" dataField="firstName"/>
<mx:DataGridColumn headerText="Last Name" dataField="lastName"/>
<mx:DataGridColumn headerText="City" dataField="city"/>
<mx:DataGridColumn headerText="Employee Code" dataField="empCode"/>
</mx:columns>
</mx:DataGrid>
<mx:Button label="Delete Items" click="button1_clickHandler(event)"/>
</s:VGroup>
</s:Application>
<?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:Script>
<![CDATA[
import mx.collections.ArrayCollection;
[Bindable]
private var resultArray:ArrayCollection = new ArrayCollection
([
{firstName:"1-1",lastName:"1-2",city:"1-3",empCode:"1-4"},
{firstName:"2-1",lastName:"2-2",city:"2-3",empCode:"2-4"},
{firstName:"3-1",lastName:"3-2",city:"3-3",empCode:"3-4"},
{firstName:"4-1",lastName:"4-2",city:"4-3",empCode:"4-4"},
{firstName:"5-1",lastName:"5-2",city:"5-3",empCode:"5-4"},
{firstName:"6-1",lastName:"6-2",city:"6-3",empCode:"6-4"},
{firstName:"7-1",lastName:"7-2",city:"7-3",empCode:"7-4"},
{firstName:"8-1",lastName:"8-2",city:"8-3",empCode:"8-4"},
{firstName:"9-1",lastName:"9-2",city:"9-3",empCode:"9-4"},
{firstName:"10-1",lastName:"10-2",city:"10-3",empCode:"10-4"},
]);
protected function button1_clickHandler(event:MouseEvent):void
{
for (var i:int=0; i< resultArray.length; i++)
{
if (resultArray[i].selected == true)
{
resultArray.removeItemAt(i);
}
}
dgEmployeeInfo.invalidateList();
}
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<s:VGroup>
<mx:DataGrid id="dgEmployeeInfo" dataProvider="{resultArray}" x="131" y="95" editable="false">
<mx:columns>
<mx:DataGridColumn headerText="Select" rendererIsEditor="true" editorDataField="selected">
<mx:itemRenderer>
<fx:Component>
<mx:HBox>
<s:CheckBox id="testChk" click="testChk_clickHandler(event)" selected="{data.selected}">
<fx:Script>
<![CDATA[
[Bindable]
public var cbSelected:Boolean;
protected function testChk_clickHandler(event:MouseEvent):void
{
data.selected = testChk.selected;
}
]]>
</fx:Script>
</s:CheckBox>
</mx:HBox>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="First Name" dataField="firstName"/>
<mx:DataGridColumn headerText="Last Name" dataField="lastName"/>
<mx:DataGridColumn headerText="City" dataField="city"/>
<mx:DataGridColumn headerText="Employee Code" dataField="empCode"/>
</mx:columns>
</mx:DataGrid>
<mx:Button label="Delete Items" click="button1_clickHandler(event)"/>
</s:VGroup>
</s:Application>
关于。谢谢，但如果我正在从数据库中提取数据，我是否应该为复选框值向数据库添加一个新字段…？是否还需要删除数据库记录？@user594979。然后重点讨论如何用数据库记录识别DataGrid行。您完全不必将所选字段添加到数据库中。继续我的示例，当检测到resultArray[i].selected==true时，您可以向button1\u clickHandler添加一些代码。在代码中，执行SQL DELETE命令构造语句，如从某些表t中删除，其中t.firstNameField=+resultArray[i].firstName+和t.lastNameField=+resultArray[i].lastName。最好的做法可能是将某个recordId字段提取到resultArray。里德斯。谢谢，但如果我从数据库中提取数据，我是否应该为复选框值向数据库中添加一个新字段..？是否还需要删除数据库记录？@user594979。然后重点讨论如何用数据库记录识别DataGrid行。您完全不必将所选字段添加到数据库中。继续我的示例，当检测到resultArray[i].selected==true时，您可以向button1\u clickHandler添加一些代码。在代码中，执行SQL DELETE命令构造语句，如从某些表t中删除，其中t.firstNameField=+resultArray[i].firstName+和t.lastNameField=+resultArray[i].lastName。最好的做法可能是将某个recordId字段提取到resultArray。里德斯。大卫。