jQuery+ajax实现文件上传（附代码）

<script src="project/js/jquery.form.js" type="text/javascript"></script>
<script src="project/js/fileload.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
createHtml($("#str"));
})
</script>
<tr>
<td>图片</td>
<td>
<p id="str">
</p>
<p style="display: none;" id="timgUrl"></p>
<p style="color: red" id="timgok"></p>
@@##@@</td>
</tr>
<script src="~/project/js/jquery.form.js" type="text/javascript"></script>
<script src="~/project/js/fileload.js" type="text/javascript"></script>

function fileloadon() {
$("#msg").html("");
$("#_fileForm").submit(function () {
$("#_fileForm").ajaxSubmit({
type: "post",
url: "/201410CarVideoAdmin/Home/UploadHelper",
success: function (data1) {
$('#timgUrl').html(data1);
var reg = new RegExp('"', "g");
var imageUrl = $('#timgUrl').text().replace(reg, "");
$('#backImgUrl').attr("src", imageUrl);
if ($('#timgUrl').html() != null) {
$('#timgok').html("文件上传成功");
} else {
$('#timgok').html("文件上传失败");
}
},
error: function (msg) {
alert("文件上传失败");
}
});
return false;
});
$("#_fileForm").submit();
}

[HttpPost]
public ActionResult UploadHelper()
{
//开始上传
string imageUrl = string.Empty;
QF.WebGamePlatform.Reference.FileUploadService service = new QF.WebGamePlatform.Reference.FileUploadService();
var fileResult = service.PicUpLoad(Request.Files[0]);
if (fileResult.Code == 0)
{
imageUrl = fileResult.Data.RawImageUrl;
}
return Json(imageUrl, JsonRequestBehavior.AllowGet);
}