flex datagrid使用arraycollection中的filterFunction属性进行过滤

爱被打了一巴掌 2022-08-02 13:43 104阅读 0赞

FilterControl.as

package \{ import mx.collections.ArrayCollection; import mx.core.Application; import mx.controls.TextInput; import mx.controls.Button; import mx.controls.ComboBox; public class FilterControl extends Application \{ \[Bindable\] public var dpColumns:ArrayCollection; \[Bindable\] public var dpRows:ArrayCollection; public var keyword:TextInput; public var btnFilter:Button; public var cmbCol:ComboBox; public function FilterControl() \{ \} public function init():void \{ dpColumns = new ArrayCollection(); dpColumns.addItem(\{data:'any', label:'Any'\}); dpColumns.addItem(\{data:'type', label:'Type'\}); dpColumns.addItem(\{data:'name', label:'Name'\}); dpColumns.addItem(\{data:'url', label:'URL'\}); dpColumns.addItem(\{data:'desc', label:'Descriptiom'\}); dpColumns.addItem(\{data:'tags', label:'Tags'\}); dpRows = new ArrayCollection(); var item:Object = new Object(); item.type = "Website"; item.name = "Expectal.com"; item.url = "http://www.expectal.com"; item.desc = "Your Professional Flash Photo Gallery with Slideshow and Background Music"; item.tags = "Flash, Gallery, Slideshow, Music"; dpRows.addItem(item); item = new Object(); item.type = "Website"; item.name = "Franto.com Blog"; item.url = "http://blog.franto.com"; item.desc = "Your Professional Flash Photo Gallery with Slideshow and Background Music"; item.tags = "Flash, Flex, AIR, Tutorial"; dpRows.addItem(item); item = new Object(); item.type = "Tutorial"; item.name = "FlexSpy - Flex/AIR inspector"; item.url = "http://www.franto.com/blog2/flexspy-inspector-in-your-flexair-application"; item.desc = "FlexSpy - Kind of what Firebug does for HTML/Ajax applications but for Flex 2.0/3.0 applications."; item.tags = "Flex, AIR, Tutorial"; dpRows.addItem(item); item = new Object(); item.type = "Tutorial"; item.name = "Quick Outline in FlexBuilder - Ctrl+O"; item.url = "http://www.franto.com/blog2/quick-outline-in-flexbuilder-ctrlo"; item.desc = "Speed up your development with Quick Outline in FlexBuilder"; item.tags = "Flex, AIR, Tutorial"; dpRows.addItem(item); item = new Object(); item.type = "Tutorial"; item.name = "Custom header in DataGrid"; item.url = "http://www.franto.com/blog2/custom-header-in-datagrid"; item.desc = "Custom header in DataGrid"; item.tags = "Flex, AIR, Tutorial"; dpRows.addItem(item); item = new Object(); item.type = "Tutorial"; item.name = "Custom header in DataGrid 2"; item.url = "http://www.franto.com/blog2/custom-header-in-datagrid-part-2"; item.desc = "Custom header in DataGrid - part 2"; item.tags = "Flex, AIR, Tutorial"; dpRows.addItem(item); item = new Object(); item.type = "Tutorial"; item.name = "Quick Outline in FlexBuilder - Ctrl+O"; item.url = "http://www.franto.com/blog2/quick-outline-in-flexbuilder-ctrlo"; item.desc = "Speed up your development with Quick Outline in FlexBuilder"; item.tags = "Flex, AIR, Tutorial"; dpRows.addItem(item); \} public function resetFilter():void \{ keyword.text = ""; filterResults(); \} public function filterResults():void \{ dpRows.filterFunction = \_sortRows; dpRows.refresh(); \} private function \_sortRows(item:Object):Boolean \{ var col:String = cmbCol.selectedItem.data as String; var key:String = keyword.text; key = key.toLowerCase(); if (key != "") \{ if (col != "any") \{ var value:String = item\[col\]; value = value.toLowerCase(); if (value.indexOf(key) >= 0) \{ return true; \} \} else \{ for (var o:String in item) \{ value = item\[o\]; value = value.toLowerCase(); if (value.indexOf(key) >= 0) \{ return true; \} \} \} \} else \{ return true; \} return false; \} \} \}

FilterFunction.mxml

<?xml version="1.0" encoding="utf-8"?> <FilterControl xmlns:mx="http://www.adobe.com/2006/mxml" xmlns="\*" layout="vertical" applicationComplete="init()"> <mx:Style source="default.css"/> <mx:HBox width="100%"> <mx:Label text="Filter:"/> <mx:TextInput id="keyword" width="100%"/> <mx:ComboBox id="cmbCol" dataProvider="\{dpColumns\}"/> </mx:HBox> <mx:HBox width="100%" horizontalAlign="right"> <mx:Button label="Filter" id="btnFilter" click="filterResults()" width="150"/> <mx:Button label="Reset" click="resetFilter()" width="150"/> </mx:HBox> <mx:DataGrid width="100%" height="100%" dataProvider="\{dpRows\}" variableRowHeight="true"> <mx:columns> <mx:DataGridColumn dataField="type" headerText="Type" width="80"/> <mx:DataGridColumn dataField="name" headerText="Name" width="180"/> <mx:DataGridColumn dataField="url" headerText="URL"/> <mx:DataGridColumn dataField="desc" headerText="Description"/> <mx:DataGridColumn dataField="tags" headerText="Tags" width="200"/> </mx:columns> </mx:DataGrid> </FilterControl>

本文转自:http://blog.chinaunix.net/u/21684/showart\_973418.html

要注意的是filterFunction设置显示和不显示，并不是删除。