Unable to open openfileDialog in silverlight -

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i want use openfiledialog upload file,but when write following code security exception fired "dialogs must user-initiated."

btn_click() {   openfiledialog filedialog=new openfiledialog();               filedialog.multiselect = false;   filedialog.filter = "all files|*.*";   bool? retval = filedialog.showdialog();      if (filedialog.showdialog()==false){      stream strm = filedialog.file.openread();     byte[] buffer = new byte[strm.length];     strm.read(buffer, 0, (int)strm.length);     strm.dispose();     strm.close();     uploadfile file=new uploadfile();      file.filename = filedialog.file.name;     file.file = buffer;      po.fileuploadasync(file);   }

as exception you're getting states open file dialog can activated user initiated action when application run in browser , restricted trust.

what trying achieve?

the simplest solution add button ui allows user control when process happens.


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