如何将文件转换为字节? [英] How to convert File into byte?

问题描述

我想将文件转换为字节.....我正在使用它进行文件上传，其中我正在获取文件的字节并调用我在c Sharp中的上传处理程序并上传它..任何人都可以帮忙.. ...

Hi,

I want to convert file into bytes..... i am using this for file upload in which i am taking bytes of the file and calling my upload handler which is in c sharp and uploading it.... can anyone help.....

推荐答案

我认为您可以执行类似的操作来获取字节数组

I think you can do something like this to fetch the byte array

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="loadFile()">

    <mx:Script>
        <![CDATA[

                private var loadedFile:ByteArray;

                private function loadFile():void
                {
                        var request:URLRequest = new URLRequest("http://test.enunciato.org/sample.pdf");
                        var urlLoader:URLLoader = new URLLoader(request);

                        urlLoader.addEventListener(Event.COMPLETE, onURLLoaderComplete);
                        urlLoader.dataFormat = URLLoaderDataFormat.BINARY;
                        urlLoader.load(request);
                }

                private function onURLLoaderComplete(event:Event):void
                {
                        loadedFile = event.target.data;
                }

                private function saveLoadedFile():void
                {
                        var file:FileReference = new FileReference();
                        file.save(loadedFile, "SampleDoc.PDF");
                }

        ]]>
    </mx:Script>

    <mx:Button label="Save Image" horizontalCenter="0" verticalCenter="0" click="saveLoadedFile()" />

</mx:Application>

在这里看看，关于同一主题还有另一个问题:

如何将pdf文件转换为字节数组，检索将字节数组转换为Flex中的pdf文件? [

take a look here, there was just another question about the same topic:

How to convert pdf file into byte array,retrieve byte array into pdf file in flex?[^]

我使用了以下代码，对我来说效果很好....它将在已安装Flash Player 10，并且根据以下站点进行了更改设置:

I have used following code and worked fine for me ....and it will work when flash player 10 is installed and settings are changed as per below site:

FileRef.addEventListener(Event.SELECT,FileSelect);
    FileRef.addEventListener(Event.COMPLETE,onFileComplete);

var filedata:ByteArray=new ByteArray();
        public function onFileComplete(event : Event) : void
             {
                         FileRef = event.currentTarget as FileReference;
                         filedata=FileRef.data;
                         var data:ByteArray = new ByteArray();
                         FileRef.data.readBytes(data,0,FileRef.data.length);
                                                       //  byteCheckUpload.writeLocation(data, FileRef.name)
                                                              }

private function FileSelect(evt:Event):void
   {
         FileRef.load();
         Txt_FileName.text=evt.currentTarget.name;
    }

http://opensource.adobe.com/wiki/display/flexsdk/Targeting+Flash+ Player + 10 [ ^ ]

http://opensource.adobe.com/wiki/display/flexsdk/Targeting+Flash+Player+10[^]

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