FLASH实现ASP.NET MVC上传---Flash篇

先看下整体思路，整个上传，以flash按钮为入口

创建Flash，添加一个按钮，并命名为btn

添加类main.as

package  {
	import flash.display.*;
	import flash.events.*;
	import flash.net.*;
	import flash.ui.*;
	import flash.external.ExternalInterface;
	
	public class main extends Sprite {
		public var btn:SimpleButton;
		private var uid:String;
		private var jid:String;
		private var sn:String;
		//文件上传
		private var file:FileReference=new FileReference();
		//过滤
		private var images_filter:FileFilter = new FileFilter("*.jpg, *.jpeg, *.gif, *.png", "*.jpg;*.jpeg;*.gif;*.png");
		//上传地址
		private var uploadURL:URLRequest;
		//构造函数
		public function main() {
			////隐藏默认菜单
   			var contextmenu:ContextMenu = new ContextMenu;
   			contextmenu.hideBuiltInItems();
			//这个参数很重要，后面会提到，重要解决sessionID不一致的问题
			uid = stage.loaderInfo.parameters.ASPSESSID;
			jid = stage.loaderInfo.parameters.AUTHID;
			//提交地址
			uploadURL =  new URLRequest("/SwfUploadImg/?ASPSESSID=" + uid + "&AUTHID=" + jid);
			//场景点击事件
			btn.addEventListener(MouseEvent.CLICK, clickHandler);
			//选择图片后事件
			file.addEventListener(Event.SELECT, selectedHandler);
			file.addEventListener(Event.OPEN, openHandler);
   			file.addEventListener(ProgressEvent.PROGRESS, progressHandler);
   			file.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
   			file.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
			file.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA,uploadCompleteDataHandler);
		}
		
		//点击按钮事件
		private function clickHandler(evt:MouseEvent):void
		{
			//显示选择图片对话框
			file.browse([images_filter]);
		}
		
		//图片选择后事件
		private function selectedHandler(e:Event):void
		{
			ExternalInterface.call("Laugh_UpImg_onSelected",file.name,file.size,file.type);
			//开始上传图片
			file.upload(uploadURL,"Filedata");
		}
		
		//开始上传
		private function openHandler(event:Event):void
		{
			ExternalInterface.call("Laugh_UpImg_onStart");
		}
		
		//上传完成
		private function uploadCompleteDataHandler(event:DataEvent):void
		{
			ExternalInterface.call("Laugh_UpImg_onComplete" , event.data);
		}
		
		//上传进度
		private function progressHandler(event:ProgressEvent):void
		{
			ExternalInterface.call("Laugh_UpImg_onProgress",event.bytesLoaded,event.bytesTotal);
		}
		
		//上传错误
		private function ioErrorHandler(event:IOErrorEvent):void
		{
			ExternalInterface.call("Laugh_UpImg_onError",event.text);
		}
		
		//上传权限错误
		private function securityErrorHandler(event:SecurityErrorEvent):void
		{
			ExternalInterface.call("Laugh_UpImg_onSecurityError",event.text);
		}
	}
	
}

ExternalInterface.call

根据注释可以判断出每个方法的作用。

stage.loaderInfo.parameters.ASPSESSID

flash主要作为上传图片的主要工具，并且实现了客户端和服务端的即时数据更新。