<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script src="jquery-1.11.2.min.js"></script>
<script type="text/javascript">
$(function () {
$(function () {
$("#fileupload").change(function () {
var reader = new FileReader();
reader.onload = function (e) {
$("#img1").attr("src",e.target.result);
}
reader.readAsDataURL($(this)[0].files[0]);
})
});
})
</script>
</head>
<body>
<form id="form1" runat="server">
<input id="fileupload" type="file" />
<img id="img1" style="width:150px; height:90px;" />
</form>
</body>
</html>
![](https://images2015.cnblogs.com/blog/779251/201512/779251-20151218141925396-329132230.png)