：
上网查了一些资料，摸索着用Flex写了一个 文件上传的工具。没做太多修饰，主要代码贴出来，免得以后忘了
1: <!-- filename :flashuploader.mxml -->
2: <?xml version="1.0" encoding="utf-8"?>
3: <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
4: xmlns:c="component.*"
5: width="450" height="450" minWidth="460" minHeight="400" initialize="application1_initializeHandler(event)" layout="absolute">
6: <mx:Style source="css/main.css"/>
7: <mx:states>
8: <mx:State name="TEST">
9: <mx:AddChild position="lastChild" relativeTo="{filelist}"> 10: <c:uploadFile currentState="UploadError">
11: </c:uploadFile>
12: </mx:AddChild>
13: </mx:State>
14: </mx:states>
15: <mx:LinkButton id="selectbutton" x="5" y="5" label="{selectlabel}" click="button1_clickHandler(event)"/> 16: <c:CountingVBox id="filelist" x="5" y="36" height="100%" maxCount="{max}"/> 17: <mx:Script>
18: <![CDATA[
19: import component.uploadFile;
20: import mx.events.FlexEvent;
21: private var filter:Array;
22: private var single:Boolean;
23:
24: private var fileRefs:FileReferenceList;
25:
26: private var fileRef:FileReference;
27: [Bindable]
28: private var max:int=10;
29: [Bindable]
30: private var selectlabel:String="文件上传";
31:
32:
33:
34: private function button1_clickHandler(event:MouseEvent):void
35: { 36: if (single){ 37: fileRef = new FileReference();
38: fileRef.addEventListener(Event.SELECT,singleSelectHandle);
39: fileRef.browse(filter);
40: }else{ 41: fileRefs = new FileReferenceList();
42: fileRefs.addEventListener(Event.SELECT,multiSelectHandle);
43: fileRefs.browse(filter);
44: }
45: }
46:
47: private function singleSelectHandle(event:Event):void
48: { 49: var file:uploadFile = new uploadFile();
50: file.parentContainer=filelist;
51: // file.fileRef = FileReference(event.currentTarget);
52: file.fileRef = fileRef;
53: filelist.addChild(file);
54:
55: }
56:
57: private function application1_initializeHandler(event:FlexEvent):void
58: { 59: if( parameters.labelselect !=null) selectlabel = parameters.labelselect;
60: if( parameters.ext != null)
61: if ( parameters.type!=null)
62: filter=[new FileFilter(parameters.type,parameters.ext)];
63: else
64: filter = [new FileFilter("Select Files"+parameters.ext, parameters.ext)]; 65:
66:
67: if (parameters.single!=null && "true" == parameters.single.toLowerCase()){ 68: single = true;
69: max = 1;
70: }else{ 71: if (parameters.max !=null )
72: max = parameters.max ;
73: if (isNaN(max)||max<=0 ) max=int.MAX_VALUE;
74: }
75: filelist.addEventListener("EMPTY",restoreSelectButton); 76: filelist.addEventListener("FULL",disableSelectButton); 77: var prefix:String="http://localhost/fileupload";
78: filelist.urlRequest = new URLRequest(prefix+"/upload.php");
79: }
80:
81: private function multiSelectHandle(event:Event):void
82: { 83: var fileList:Array=fileRefs.fileList;
84: for(var i:int =0;i<fileList.length;i++){ 85:
86: var file:uploadFile = new uploadFile();
87: file.parentContainer=filelist;
88: file.fileRef = fileList[i];
89: filelist.addChild(file);
90: }
91: }
92:
93: private function restoreSelectButton(event:Event):void
94: { 95: selectbutton.visible=true;
96: }
97:
98: private function disableSelectButton(event:Event):void
99: { 100: selectbutton.visible=false;
101:
102: }
103:
104: ]]>
105: </mx:Script>
106: </mx:Application>
1: <!-- filename: component/uploadFile.mxml -->
2: <?xml version="1.0" encoding="utf-8"?>
3: <mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"
4: xmlns:c="component.*"
5: height="20" width="440" initialize="canvas1_initializeHandler(event)" >
6: <mx:states>
7: <mx:State name="UploadError" >
8: <mx:SetProperty name="label" target="{progressbar1}" value="{errorInfo}"/> 9: <mx:SetProperty name="styleName" value="error"/>
10: </mx:State>
11: <mx:State basedOn="UploadError" name="FileError">
12: <mx:SetProperty name="x" target="{image1}" value="317"/> 13: <mx:RemoveChild target="{progressbar1}"/> 14: <mx:SetStyle name="styleName" target="{label1}" value="error1"/> 15: <mx:SetProperty name="toolTip" target="{label1}" value="{errorInfo}"/> 16: </mx:State>
17: </mx:states>
18: <mx:Image x="5" width="16" height="16" source="{fileicon}" verticalCenter="-1" /> 19: <c:FilenameLabel x="23" width="160" text="{filename}" truncSize="10" verticalCenter="-1"/> 20: <mx:Label x="185" width="64" text="{extname}" verticalCenter="-1"/> 21: <mx:Label id="label1" x="251" width="64" text="{filesize}" textAlign="right" verticalCenter="-1"/> 22: <mx:ProgressBar id="progressbar1" x="317" width="100" height="16" label="%3%%" labelPlacement="center" maximum="100" source="{_fileRef}" 23: verticalCenter="-1"/>
24: <mx:Image id="image1" x="419" width="16" height="16" click="cancle_clickHandler(event)" source="@Embed('icons/cancel.png')" verticalCenter="-1"/> 25: <mx:Script>
26: <![CDATA[
27: import flash.events.MouseEvent;
28: import flash.events.ProgressEvent;
29:
30: import mx.controls.Alert;
31: import mx.events.FlexEvent;
32: import mx.states.Transition;
33:
34: private static var MAX_FILE_SIZE:uint =int.MAX_VALUE;
35:
36: private var _parent:CountingVBox;
37: [Bindable]
38: private var _fileRef:FileReference ;
39: [Bindable]
40: private var errorInfo:String="";
41: [Bindable]
42: private var fileicon:Class;
43: [Bindable]
44: private var extname:String;
45: [Bindable]
46: private var filesize:String;
47: [Bindable]
48: private var filename:String;
49:
50:
51:
52:
53: public function set fileRef(value:FileReference):void
54: { 55: _fileRef = value;
56: filename=_fileRef.name.substring(0,_fileRef.name.indexOf(_fileRef.type));
57: extname=_fileRef.type;
58: var size:uint=_fileRef.size;
59: var unit:String="B";
60: if(size>10240){ 61: size/=1024;
62: unit="KB";
63: }
64: if(size>10240){ 65: size/=1024;
66: unit="MB";
67: }
68: if(size>10240){ 69: size/=1024;
70: unit="GB";
71: }
72:
73: filesize=size.toFixed(0)+unit;
74: fileicon=getFileIconClass();
75: if (checkFilesize()){ 76: _fileRef.upload(_parent.urlRequest);
77: _fileRef.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA,upload_complete);
78: }
79: }
80:
81: public function set parentContainer(p:CountingVBox):void
82: { 83: _parent = p;
84: }
85:
86:
87: private function getFileIconClass():Class
88: { 89: [Embed("icons/Unknown.png")] 90: var unknown:Class;
91:
92: [Embed("icons/doc.png")] 93: var doc:Class;
94:
95: //其他文件类型
96:
97: if (_fileRef.type == null){ 98: return unknown;
99: }
100:
101: var type:String=_fileRef.type.toLowerCase();
102: if (type == ".doc") return doc;
103: if (type == ".docx") return doc;
104: //其他文件类型
105:
106: return unknown;
107: }
108:
109: private function cancle_clickHandler(event:MouseEvent):void
110: { 111: _fileRef.cancel();
112: _parent.removeUploadedFile(_fileRef);
113: _parent.removeChild(this);
114: if (_parent.count<1){ 115: _parent.dispatchEvent(new Event("EMPTY")); 116: }
117: }
118:
119: protected function upload_complete(event:DataEvent):void
120: { 121: _parent.addUploadedFile(_fileRef);
122: }
123:
124: protected function upload_IO_error(event:IOErrorEvent):void
125: { 126: errorInfo="UploadError";
127: currentState = "UploadError";
128:
129: }
130:
131: private function checkFilesize():Boolean
132: { 133: if (_fileRef.size>MAX_FILE_SIZE){ 134: errorInfo = "File too Big";
135: currentState = "FileError";
136: return false;
137: }
138: return true;
139: }
140:
141: ]]>
142: </mx:Script>
143: </mx:Canvas>
144: