IE8下无法进行上传图片的预览？？？求帮忙

wang5256620 2012-04-24 10:58:18



<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ImageViewFileUploadControl.aspx.cs" Inherits="Test_带图片预览功能的FileUpload控件_ImageViewFileUploadControl" %>



<!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></title>

    <script type="text/javascript">

        //如果用户选择了图片，则显示图片的预览效果

        function previewImage() {

            var x = document.getElementById("file");

            if (!x || !x.value)//如果没有选择上传文件 

            {

                return;

            }

            var patn = /\.jpg$|\.jpeg$|\.gif$/i;

            if (patn.test(x.value))//如果上传文件的后缀是.jpg或.jpeg或.gif 

            {

                var y = document.getElementById("imgPicture");

                if (y) {

                    y.style.display = "";

                    y.src = x.value;

                }

                setTimeout("hidden()", 5000); //5秒之后执行隐藏图片的javascript方法 

            }

            else {

                alert("您选择的似乎不是图像文件。");

            }

        }

        //隐藏照片 

        function hidden() {

            var y = document.getElementById("imgPicture");

            if (y) {

                y.style.display = "none";

            }

        } 



    </script>

</head>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:FileUpload ID="file" runat="server" onchange="previewImage()"  /><br />

        <asp:Image ID="imgPicture" runat="server" AlternateText="图片" style="display:none;" />



        <asp:Button ID="btnFileUpload" runat="server" Text="上传文件" />

    </div>

    </form>

</body>

</html>