多图片上传通过webservices(与js通信的方式)

以下是通过选择本地图片文件，然后显示预览，

通过将图片转化为byteArray再传递给Webservices进行上传

 

C#代码(Webservices)：

[WebMethod(Description = "Web 服务提供的方法，返回是否文件上载成功与否。")]
[System.Xml.Serialization.XmlInclude(typeof(Picture))]

    public bool UploadFiles(Pictures files)
    {
        try
        {
            foreach (Picture p in files.ps)
            {
                ///定义并实例化一个内存流，以存放提交上来的字节数组。
                MemoryStream m = new MemoryStream(p.fs);
               
                FileStream f = new FileStream(Server.MapPath(".") + "\\"
                 + p.filename, FileMode.Create);               
                m.WriteTo(f);
                m.Close();
                f.Close();
                f = null;
                m = null;
            }
            return true;
        }
        catch
        {
            return false;
        }
    }

 Pictures是Picture的数组集合对象，也可以将Pictures换成Picture[]，生成flex中通过自动生成Webservices中间代码实现

Picture对象:

public class Picture
{
 public Picture()
 {
  //
  // TODO: 在此处添加构造函数逻辑
  //      
 }
    public byte[] fs;
    public string filename;
}

Flex上传的代码:

  private var pis:ArrayOfPicture=new ArrayOfPicture();
  
  private var s:Service; 
  private function init():void
       {
           s=new Service();
           ExternalInterface.addCallback("OnFileChange",frSelectHandler);//注册JS回调
           btnBrowser.addEventListener(MouseEvent.CLICK,mouseClickHandler);
       }
      
       private function mouseClickHandler(event:MouseEvent):void
       {
           ExternalInterface.call("Browser");//调用JS中Browser函数
       }
  
    private var i:Number=0;
       private function frSelectHandler(path:String):void
       {
         var img:MyImage=new MyImage();
         img.name="img"+i;
            img.source = path;
            img.test=path;
            imgbox.addChild(img);
            i++;
       }
      
        private function uploadimgs():void{
         pis.removeAll();
         for(var i:Number=0;i<imgbox.getChildren().length;i++){
          var img:MyImage=imgbox.getChildByName("img"+i) as MyImage;
           var ohSnap:ImageSnapshot = ImageSnapshot.captureImage((imgbox.getChildByName("img"+i) as MyImage));
             var str:String=ImageSnapshot.encodeImageAsBase64(ohSnap);
             var b64:Base64Decoder=new Base64Decoder();
             b64.decode(str);
             var p:Picture=new Picture();
             p.fs=b64.toByteArray();
             p.filename=int(Math.random()*100000000)+img.test.substring(img.test.length-4,img.test.length);
             pis.addPicture(p);
          }
          
         s.adduploadFilesEventListener(upload);
         var ps:Pictures=new Pictures();
         ps.ps=pis;
         s.uploadFiles(ps);
        }
        private function upload(e:UploadFilesResultEvent):void{
         if(e.result){
          Alert.show("上传成功!");
         }
        }

标签部分:

<mx:Button x="55" id="btnBrowser" y="50" label="选择文件"/>
 <mx:VBox id="imgbox" x="188.5" y="10"  verticalScrollPolicy="auto">
 </mx:VBox>
 <mx:Button x="55" y="184" label="上传(多个)" click="uploadimgs()"/>

 

在网页中添加以下代码：
<script language="JavaScript" type="text/javascript">
var requiredMajorVersion = 9;
var requiredMinorVersion = 0;
var requiredRevision = 28;
//关键代码
function Browser()
{
document.getElementById("fileInput").click();
}
function OnFileChange()
{

//TestUpfile是flash名称
thisMovie("TestUpfile").OnFileChange(document.getElementById("fileInput").value);
}
function thisMovie(movieName) {
         if (navigator.appName.indexOf("Microsoft") != -1) {
             return window[movieName];
         } else {
             return document[movieName];
         }
     }
</script>

 

添加文件标签:<input type="file" id="fileInput" style="display:none" onchange="OnFileChange()" />