请教 关于 用JS获取待上传文件大小的问题！
我想用JS获取待上传文件的大小，
var image = new Image();
image.dynsrc = src;
alert(image.fileSize);
但IE8下提示dynsrc属性拒绝访问，请问如何解决，有没有别的方法啊？

[解决办法]

C# code

using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;namespace SilverlightApplication1{  public partial class MainPage : UserControl  {    public MainPage()    {      InitializeComponent();    }    private void button1_Click(object sender, RoutedEventArgs e)    {      OpenFileDialog openFileDialog1 = new OpenFileDialog();      openFileDialog1.Filter = "All files (*.*)|*.*";      openFileDialog1.Multiselect = false;      bool? userClickedOK = openFileDialog1.ShowDialog();      if (userClickedOK == true)      {        System.IO.Stream fileStream = openFileDialog1.File.OpenRead();        MessageBox.Show(fileStream.Length.ToString());        fileStream.Close();      }      openFileDialog1 = null;    }      }}
[解决办法]
Flash上传限制文件大小
http://demo.swfupload.org/Documentation/

File API得到文件大小
http://dotnet.aspx.cc/article/facbb9a7-c9c6-46ad-9591-5ba34ae27e58/read.aspx