Flex中单文件的上传实现方式

发布时间：2020-12-15 04:32:22 所属栏目：百科来源：网络整理

导读：注意：要运行此示例，请更改 uploadURL.url 属性以指向实际的 URL，而不是示例中虚拟的地址。URL 应指向名为 yourUploadHandlerScript.cfm 的文件，该文件位于指定 URL 的根 Web 目录下。根据您的配置，您可能还需要编译 SWF 文件，将“本地回放安全性”设

注意：要运行此示例，请更改 uploadURL.url 属性以指向实际的 URL，而不是示例中虚拟的地址。URL 应指向名为yourUploadHandlerScript.cfm 的文件，该文件位于指定 URL 的根 Web 目录下。根据您的配置，您可能还需要编译 SWF 文件，将“本地回放安全性”设置为“只访问网络”，或更新 Flash Player 的安全设置，以允许此文件网络访问。

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package?{??
????import?flash.display.Sprite;??
????import?flash.events.*;??
????import?flash.net.FileFilter;??
????import?flash.net.FileReference;??
????import?flash.net.URLRequest;??
??
????public?class?FileReferenceExample?extends?Sprite?{??
????????private?var?uploadURL:URLRequest;??
????????private?var?file:FileReference;??
??
????????public?function?FileReferenceExample()?{??
????????????uploadURL?=?new?URLRequest();??
????????????uploadURL.url?=?"http://www.[yourDomain].com/yourUploadHandlerScript.cfm";??
????????????file?=?new?FileReference();??
????????????configureListeners(file);??
????????????file.browse(getTypes());??
????????}??
??
????????private?function?configureListeners(dispatcher:IEventDispatcher):void?{??
????????????dispatcher.addEventListener(Event.CANCEL,?cancelHandler);??
????????????dispatcher.addEventListener(Event.COMPLETE,?completeHandler);??
????????????dispatcher.addEventListener(HTTPStatusEvent.HTTP_STATUS,?httpStatusHandler);??
????????????dispatcher.addEventListener(IOErrorEvent.IO_ERROR,?ioErrorHandler);??
????????????dispatcher.addEventListener(Event.OPEN,?openHandler);??
????????????dispatcher.addEventListener(ProgressEvent.PROGRESS,?progressHandler);??
????????????dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR,?securityErrorHandler);??
????????????dispatcher.addEventListener(Event.SELECT,?selectHandler);??
????????????dispatcher.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA,uploadCompleteDataHandler);??
????????}??
??
????????private?function?getTypes():Array?{??
????????????var?allTypes:Array?=?new?Array(getImageTypeFilter(),?getTextTypeFilter());??
????????????return?allTypes;??
????????}??
??
????????private?function?getImageTypeFilter():FileFilter?{??
????????????return?new?FileFilter("Images?(*.jpg,?*.jpeg,?*.gif,?*.png)",?"*.jpg;*.jpeg;*.gif;*.png");??
????????}??
??
????????private?function?getTextTypeFilter():FileFilter?{??
????????????return?new?FileFilter("Text?Files?(*.txt,?*.rtf)",?"*.txt;*.rtf");??
????????}??
??
????????private?function?cancelHandler(event:Event):void?{??
????????????trace("cancelHandler:?"?+?event);??
????????}??
??
????????private?function?completeHandler(event:Event):void?{??
????????????trace("completeHandler:?"?+?event);??
????????}??
??
????????private?function?uploadCompleteDataHandler(event:DataEvent):void?{??
????????????trace("uploadCompleteData:?"?+?event);??
????????}??
??
????????private?function?httpStatusHandler(event:HTTPStatusEvent):void?{??
????????????trace("httpStatusHandler:?"?+?event);??
????????}??
??????????
????????private?function?ioErrorHandler(event:IOErrorEvent):void?{??
????????????trace("ioErrorHandler:?"?+?event);??
????????}??
??
????????private?function?openHandler(event:Event):void?{??
????????????trace("openHandler:?"?+?event);??
????????}??
??
????????private?function?progressHandler(event:ProgressEvent):void?{??
????????????var?file:FileReference?=?FileReference(event.target);??
????????????trace("progressHandler?name="?+?file.name?+?"?bytesLoaded="?+?event.bytesLoaded?+?"?bytesTotal="?+?event.bytesTotal);??
????????}??
??
????????private?function?securityErrorHandler(event:SecurityErrorEvent):void?{??
????????????trace("securityErrorHandler:?"?+?event);??
????????}??
??
????????private?function?selectHandler(event:Event):void?{??
????????????var?file:FileReference?=?FileReference(event.target);??
????????????trace("selectHandler:?name="?+?file.name?+?"?URL="?+?uploadURL.url);??
????????????file.upload(uploadURL);??
????????}??
????}??
}?

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