用Javascript调用Silverlight

我想通过javascript调用Silverlight应用程序的公共方法，该方法只需设置一个私有变量。当我尝试设置文件名时，出现javascript错误。 fu.Content.myObject未定义。任何人都可以发现错误？ http://www.devicity.com/fileuploadertestpage.aspx 用Javascript调用Silverlight

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org /TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml" > 
<head runat="server"> 
<title>FileUploader</title> 
<style type="text/css"> 
html, body { 
    height: 100%; 
    overflow: auto; 
} 
body { 
    padding: 0; 
    margin: 0; 
} 
#silverlightControlHost { 
    height: 100%; 
    text-align:center; 
} 
</style> 
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script> 

<script type="text/javascript" src="Silverlight.js"></script> 
<script type="text/javascript"> 
    function onSilverlightError(sender, args) { 
     var appSource = ""; 
     if (sender != null && sender != 0) { 
      appSource = sender.getHost().Source; 
     } 

     var errorType = args.ErrorType; 
     var iErrorCode = args.ErrorCode; 

     if (errorType == "ImageError" || errorType == "MediaError") { 
      return; 
     } 

     var errMsg = "Unhandled Error in Silverlight Application " + appSource + "\n" ; 

     errMsg += "Code: "+ iErrorCode + " \n"; 
     errMsg += "Category: " + errorType + "  \n"; 
     errMsg += "Message: " + args.ErrorMessage + "  \n"; 

     if (errorType == "ParserError") { 
      errMsg += "File: " + args.xamlFile + "  \n"; 
      errMsg += "Line: " + args.lineNumber + "  \n"; 
      errMsg += "Position: " + args.charPosition + "  \n"; 
     } 
     else if (errorType == "RuntimeError") {   
      if (args.lineNumber != 0) { 
       errMsg += "Line: " + args.lineNumber + "  \n"; 
       errMsg += "Position: " + args.charPosition + "  \n"; 
      } 
      errMsg += "MethodName: " + args.methodName + "  \n"; 
     } 

     throw new Error(errMsg); 
    } 
</script> 
<script language="javascript" type="text/javascript"> 
    function SetFileName() { 
     var fu = document.getElementById("FileUpload1"); 
     fu.Content.myObject.SetFileName("10"); 
    } 
</script> 
</head> 
<body> 
<form id="form1" runat="server" style="height:100%"> 
<div id="silverlightControlHost"> 
    <object data="data:application/x-silverlight-2," id="FileUpload1" type="application/x-silverlight-2" width="600" height="600"> 
     <param name="source" value="ClientBin/FileUploader.xap"/> 
     <param name="onError" value="onSilverlightError" /> 
     <param name="background" value="white" /> 
     <param name="minRuntimeVersion" value="3.0.40818.0" /> 
     <param name="autoUpgrade" value="true" /> 
     <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=3.0.40818.0" style="text-decoration:none"> 
      <img src="http://go.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" style="border-style:none"/> 
     </a> 
    </object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div> 
    <input type="button" onclick="SetFileName();" value="SetFileName" /> 
</form> 
</body> 
</html>

[ScriptableType] 
public partial class MainPage : UserControl 
{ 
    public MainPage() 
    { 
     InitializeComponent(); 
    } 

    private void UserControl_Loaded(object sender, RoutedEventArgs e) 
    { 

     HtmlPage.RegisterScriptableObject("myObject", this); 

    } 

    private string m_FileName = "setthis"; 

    [ScriptableMember] 
    public void SetFileName(string fileName) 
    { 
     m_FileName = fileName; 
    } 

    private OpenFileDialog dlg = new OpenFileDialog(); 
    private void Browse_Click(object sender, RoutedEventArgs e) 
    { 

     dlg.Multiselect = false; 
     dlg.Filter = "MP3s (*.mp3)|*.mp3|All files (*.*)|*.*"; 

     bool? retval = dlg.ShowDialog(); 

     if (retval != null && retval == true) 
     { 

      StatusText.Text = dlg.File.Name; 
     } 
     else 
     { 
      StatusText.Text = "No file selected..."; 
     } 
    } 

    private void UploadFile(string fileName, Stream data) 
    { 
     UriBuilder ub = new UriBuilder("http://localhost:43439/uploadfile.aspx"); 
     ub.Query = string.Format("filename={0}", m_FileName); 

     WebClient c = new WebClient(); 
     c.OpenWriteCompleted += (sender, e) => 
     { 
      PushData(data, e.Result); 
      e.Result.Close(); 
      data.Close(); 
     }; 
     c.OpenWriteAsync(ub.Uri); 
    } 

    private void Upload_Click(object sender, RoutedEventArgs e) 
    { 

     try 
     { 
      UploadFile(StatusText.Text, dlg.File.OpenRead()); 
     } 
     catch (Exception ex) 
     { 
      StatusText.Text = ex.ToString(); 
     } 

    } 



    private void PushData(Stream input, Stream output) 
    { 
     byte[] buffer = new byte[4096]; 
     int bytesRead; 
     int totalBytesRead = 0; 

     while ((bytesRead = input.Read(buffer, 0, buffer.Length)) != 0) 
     { 
      totalBytesRead += bytesRead; 
      StatusText.Text = ((int)(totalBytesRead/input.Length)).ToString("P"); 
      output.Write(buffer, 0, bytesRead); 

     } 
    } 
}

来源

2010-12-21 Darthg8r

请问，如果你不利用Javascript代码SetFileName功能Content工作？

fu.content.myObject.SetFileName("10");

这是我看到我的程序和代码正在调用Silverlight对象之间唯一明显的区别。

来源

2010-12-21 22:57:54 Greg

不，同样的问题，尽管IE给“未指定的错误”，Firefox是一个未定义的对象。 http://www.devicity.com/fileuploadertestpage.aspx – Darthg8r 2010-12-22 06:20:36

用Javascript调用Silverlight

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