html5 完整图片上传

<div class="photo" style="display:none;" id="upPhoto"><div class="pop-cover"></div><div style="position: absolute; top:30%; left:5%; width:90%; margin:0 auto; z-index:99;">
<a href="#" class="potos tbtm" ><input type="file" name="file" id="file1" style="display:block; width:100%; text-align:center; opacity: 0; cursor:pointer;"/><span style=" z-index:1; position:relative; top:-8px; ">本地上传</span></a><a href="#" class="cancel">取消</a></div></div>
</div>
</section>
</div>
</form>
</body>
<script type="text/javascript" src="js/lib/jquery-1.9.0.min.js"></script>
<script type="text/javascript" src="js/lib/ajaxfileupload.js"></script>
<script>

$(document).ready (function () {

$("#head").click(function () {
$(".photo").show();

});
$("#file1").on("change", function () {
change();
})
function change(target) {
$(".photo").hide();
var allowExtention = ".jpg,.bmp,.png,.jpeg";
// console.log(target);
var input = document.getElementById("file1"); //获取input标签
var extention = input.value.substring(input.value.lastIndexOf(".") + 1).toLowerCase(); //截取后缀
if (extention && allowExtention.indexOf(extention) > -1) { //判断上传图片类型
var fileSize = input.files[0].size; //获取上传图片大小
if (fileSize) {
if (fileSize <1.5* 1000 * 1024) { //js限制图片上传大小
ajaxFileUpload();
}
else
addSystemTip($page, "上传图片过大！");
}

}
else
addSystemTip($page, "上传图片格式不正确！");

}

// 使用jquery ajaxFileupload插件 原理是把一个form提交到后端来获取图片

//所以 input type=file 标签必须要给一个 name属性，是必须的否则后台无法获取图片
function ajaxFileUpload() {
$.ajaxFileUpload({
url: "MyAccount.aspx?type=img"////用于文件上传的服务器端请求地址
, secureuri: false // //是否需要安全协议，一般设置为false
, fileElementId: 'file1' //文件上传域的ID
, dataType: 'json' //返回值类型 一般设置为json
// , type: 'post'
, success: function (data, status) //服务器成功响应处理函数
{
$("#img").attr("src", data.imgurl);
// var input = document.getElementById("file1");
var span = $("#file1").next();
$("#file1").remove(); //上传成功后删除file标签，否则无法继续上传
var ele = $('<input type="file" name="file" id="file1" style="display:block; width:100%; text-align:center; opacity: 0; cursor:pointer;"/>'); //重新创建file标签
ele.insertBefore(span);
ele.on("change", function () { //重新绑定change事件句柄
change();
})
$(".photo").hide();
},
error: function (data, status, e)//服务器响应失败处理函数
{
$(".photo").hide();
}
});
}
$(".cancel").click(function () {

$(".photo").hide();

})
$(".pop-cover").mousemove(function () {

$(".photo").hide();

})
})
</script>
</html>

//对应后台代码，并且将上传图片重新绘画一下 指定像素大小

public partial class MyAccount : MemberBase
{
public MemberDetails user = new MemberDetails();

public string ImageURl = "";
public string encodeName = "";
public string sex = "保密";
string domain = XpVShop.MyFuc.Utils.GetAppSettingValue("turnUrl") + "/Upload/users/";
string localUrl = XpVShop.MyFuc.Utils.GetAppSettingValue("PCUploadPath2");

// string domain = "http://localhost:89/Upload/images/";//本地测试使用
// string localUrl=@"F:\hz\code\aishop\Publish\vshop\Upload\images\";

protected void Page_Load(object sender, EventArgs e)
{

if (!IsPostBack)
{
XpVShop.MyFuc.LogHelper.Write("MyAccount mid:" + CurrentUser.MemberID);
user = MemberBLL.GetMemberDetails(CurrentUser.MemberID);
string u = "vshop_ChangeName.aspx";
encodeName = XpVShop.MyFuc.Utils.UrlEncode(u);
if (user.Photo.IndexOf("http://wx.qlogo.cn") == -1)
ImageURl = domain + user.Photo;
else
ImageURl = user.Photo;
if (!string.IsNullOrEmpty(user.Mobile))
user.Mobile = user.Mobile.Substring(0, 5) + "***" + user.Mobile.Substring(user.Mobile.Length - 1, 1);
;
if (user.Sex) sex = "男";
else sex = "女";
string type = Utils.ReqStrParams("type", "");
if (type == "img")
{
HttpFileCollection files = Request.Files;
string msg = string.Empty;
string error = string.Empty;
string imgurl;

if (files.Count > 0)
{
string name = System.IO.Path.GetFileName(files[0].FileName);
// string url = Server.MapPath("Upload/images/") + CurrentUser.MemberID + name;

XpVShop.MyFuc.LogHelper.Write(" MyAccount 存放路径 localUrl:" + localUrl);
try
{
string strGuid = System.Guid.NewGuid().ToString().ToUpper(); //始化 Guid 类的新
string strFileExt = name.Substring(name.LastIndexOf(".")); //得到图片的后缀
string path = localUrl + strGuid + strFileExt;
System.Web.HttpPostedFile postedFile = files[0];
XpVShop.MyFuc.LogHelper.Write("MyAccount 存放地址之前;" + path);
// files[0].SaveAs(localUrl + CurrentUser.MemberID + name);
XpVShop.MyFuc.Utils.GetThumbNail(name, 350,200, "image/pjpeg", false, postedFile.InputStream, path);
imgurl = strGuid + strFileExt;
user.Photo = imgurl;
MemberBLL.UpdateMemberPhoto(user);
CurrentUser.Photo = imgurl;
ImageURl = domain + user.Photo;
XpVShop.MyFuc.LogHelper.Write(" MyAccount 保存图片路径" + ImageURl + "保存数据库字段:user.Photo:" + imgurl + "存放地址 " + path);
// msg = " 成功! 文件大小为:" + files[0].ContentLength;
string res = "{ error:'" + error + "', msg:'" + msg + "',imgurl:'" + ImageURl + "'}";
Response.Write(res);
Response.End();
}
catch (Exception ex)
{
XpVShop.MyFuc.LogHelper.Write("MyAccount ex:" + ex.ToString());

}

}
}
}

}
}

/// <summary>
/// 处理上传图片为指定像素
/// </summary>
/// <param name="strFileName">文件名</param>
/// <param name="iWidth"></param>
/// <param name="iheight"></param>
/// <param name="strContentType">图片类型</param>
/// <param name="blnGetFromFile">是否是从本地文件名获取文件流</param>
/// <param name="ImgStream">文件流</param>
/// <param name="path">保存路径</param>
public static void GetThumbNail(string strFileName, int iWidth, int iheight, string strContentType, bool blnGetFromFile, System.IO.Stream ImgStream, string path)
{
System.Drawing.Image oImg;
if (blnGetFromFile) oImg = System.Drawing.Image.FromFile(strFileName);
oImg = System.Drawing.Image.FromStream(ImgStream);
oImg = oImg.GetThumbnailImage(iWidth, iheight, null, IntPtr.Zero); //GetThumbnailImage方法是返回此Image对象的缩略图
// string strGuid = System.Guid.NewGuid().ToString().ToUpper(); //始化 Guid 类的新
// string strFileExt = strFileName.Substring(strFileName.LastIndexOf(".")); //得到图片的后缀
//MemoryStream MemStream = new MemoryStream(); //创建其支持存储区为内存的流
oImg.Save(path);
}