转载：http://www.cnblogs.com/Irving/archive/2013/03/01/2939292.html
下载：http://www.phpletter.com/download_project_version.php
就是利用Iframe ,使用什么没有好说的
HTML
<script src="AjaxFileUploaderV2.1/jquery.js" type="text/javascript"></script>
<script src="AjaxFileUploaderV2.1/ajaxfileupload.js" type="text/javascript"></script>
<script type="text/javascript">
function ajaxFileUpload() {
$("#loading").ajaxStart(function () {
$(this).show();
}).ajaxComplete(function () {
$(this).hide();
});
$.ajaxFileUpload({
url: 'Handler1.ashx',
secureuri: false,
fileElementId: 'file',
dataType: 'json',
data: { name: 'Irving', id: '1991428' },
success: function (data, status) {
alert(data.msg);
},
error: function (data, status,e) {
alert(e);
}
}
)
return false;
}
</script>
</head>
<body>
<img id="loading" src="AjaxFileUploaderV2.1/loading.gif" style="display: none;" />
<form method="post" enctype="multipart/form-data">
<input id="file" type="file" size="45" name="fileToUpload" >
<button class="button" id="buttonUpload" onclick="return ajaxFileUpload();">
Upload</button>
</form>
</body>
hander测试下
context.Response.ContentType = "text/html";
HttpPostedFile file = context.Request.Files["fileToUpload"];
if (file != null && string.IsNullOrEmpty(file.FileName) == false)
{
file.SaveAs(context.Server.MapPath("~/Files/") + file.FileName);
}
context.Response.Write("{status:'200',success:true,msg:'" + "OK" + "'}");
注意问题
1.返回JSON格式(http://bbs.csdn.net/topics/390050342),context.Response.ContentType = "text/html"; ,否则浏览器总是提示将返回的JSON结果另存为文件
2.jQuery.handleError(s, xml, status, e); jquery的handleError函数，但此函数在1.4.2之后不存在了,所以要不修改插件源码,或者用低版本了啦
3.IE9兼容性问题 找不到链接了
4.ajaxToolkit http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/AjaxFileUpload/AjaxFileUpload.aspx
5.struts2 http://www.blogjava.net/sxyx2008/archive/2010/11/02/336826.html
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