注意以下页面代码里，每个凝视差点儿都是讲的一个有用而又强大有趣的技巧哦！！
因为编写在线编辑器的原因。这个控件也又一次封装了一下，为了參照，原先的代码也不删除了。新封装的就贴在后面吧。
/*
* 用到的几个样式
*/
<style>
/* 全兼容的图像自己主动垂直居中的关键样式哦^_^ */
.imgmid {
display: inline-block;
*display: inline;
*zoom: 1;
height: 100%;
width: 1px;
margin-left: -1px;
vertical-align: middle;
}
/* 图片等比自适应大小的css实现，仅仅要设定最大宽度最大高度就能够了。比用JS实现来的方便轻巧高效多了吧^_^ */
.autoSize {
max-width: 360px;
max-height: 240px;
vertical-align: middle;
}
.activeImg {
position: absolute;
}
/* 方块状的容器，仅仅显示圆形区域的样式哦^_^ */
.showImg {
width: 100px;
height: 100px;
display: none;
position: relative;
overflow: hidden;
float: left;
border-radius: 50%;
behavior: url(css/PIE.htc);
float:left;
clear:right;
}
</style>
<form method="post" id="fmPhoto" target="hidFrame" enctype="multipart/form-data" action="ReciveUpload">
<div class="fmc">
/* 无刷新表单提交的关键——隐藏的iframe，表单的target指向这个隐藏的iframe */
<iframe id="hidFrame" name="hidFrame" style="display:none"></iframe>
<div style="width: 360px; height: 240px; position: relative; float:left;">
<div style="width: 360px; height: 240px; position: relative; overflow: hidden; float: left; text-align:center;">
<img alt="图片格式为jpg,最大为2M" id="imgPhoto" src="@srcPhoto" class="autoSize" /><span class="imgmid"></span>/*这个span就是图片垂直居中的关键*/
</div>
<img alt="" id="imgScroll" src="~/Images/img_scroll.png" style="z-index: 100; left: 0; top: 0; position: absolute;" />
</div>
<div class="showImg">
<img alt="" id="imgShow" src="@srcPhoto" style="position: absolute;" />
</div>
<div style="color:Gray;clear:left; margin-bottom:20px;">图片格式为jpg，图片最大为2M</div>
/* 能够自己定义样式的file控件。就是这么简单。自己定义一个div,然后里面放一个占满大小的全透明file标签。怎么样，崇拜我吧^_^ */
<div style ="border:1px solid gray;position:relative; width:100px; height:40px;line-height:40px; text-align:center; vertical-align:middle;font-size:18px;">请选择图像
<input type="file" id="fileUpload" name="ImageFile" style="position: absolute; width: 100%; height: 100%; filter: alpha(opacity=0); opacity: 0; top: 0; left: 0;" />
</div>
<input type="hidden" id="ImgWidth" name="ImgWidth" />
<input type="hidden" id="ImgHeight" name="ImgHeight" />
<input type="hidden" id="ImgTop" name="ImgTop" />
<input type="hidden" id="ImgLeft" name="ImgLeft" />
</div>
<div class="mb">
<input type="submit" class="lang-btn" id="btnSubmit" value="确定" />
<a href="javascript:;" class="lang-btn lang-btn-huge lang-cancel mlw">取消</a>
</div>
</form>
<script type="text/javascript">
//自己定义光标
//document.body.style.cursor = "url('http://bbb.com/images/cur.cur')";
function UploadCallBack(msg) {
if (msg.indexOf("上传图片出错") == -1) {
// 图片样式清理（防止新载入的图片受影响），再加上必须的样式
$("#imgPhoto").removeAttr("width").removeAttr("height").removeAttr("style").removeClass("activeImg").addClass("autoSize").attr("src", msg);
$("#imgShow").attr("src", msg);
} else {
alert("系统忙，请稍后再试！
"); } } // 图片缩放和移动的代码，也是超简单吧， // 相比网上那些封装好的代码控件。动不动就是几本JS，复杂得要死，又难以维护。 // 我这个实现。算是一个贡献吧,还有助于刚開始学习的人学习和开启智慧^_^ $(function () { var img = $("#imgScroll"); var obj = $("#imgPhoto"); var isMove = false; var x = y = 0; img.on("click", function (event) { if (isMove) { isMove = false; obj.css("cursor", "default"); $(".showImg").hide(); } else { isMove = true; img.css("cursor", "move"); obj.attr("width", obj.width()).attr("height", obj.height()).removeClass("autoSize").addClass("activeImg").css({ top: obj.css("top"), left: obj.css("left") }); var left = obj.css("left") == "auto" ?
0 : obj.css("left"); var top = obj.css("top") == "auto" ?
0 : obj.css("top"); x = event.pageX - parseInt(left); y = event.pageY - parseInt(top); $("#imgShow").attr("width", obj.width()).attr("height", obj.height()).css({ top: obj.css("top") - 70, left: obj.css("left") - 130 }); $(".showImg").show(); } }).on("mouseout", function () { isMove = false; obj.css("cursor", "default"); $(".showImg").hide(); }).on("mousewheel", function (event) { var wm = event.originalEvent.wheelDelta > 0 ? 1 : -1; var width = obj.width() * (10 + wm) / 10;//可适合改动 var height = obj.height() * (10 + wm) / 10; if (width > 100 && height > 100) { obj.width(width).css({ "left": (180 - (width / 2)) }); obj.height(height).css({ "top": (120 - (height / 2)) }); $("#imgShow").width(width).height(height).css({ top: 50 - (height / 2), left: 50 - (width / 2) }); $(".showImg").show(); } }); $(document).mousemove(function (e) { if (isMove) { obj.css({ top: e.pageY - y, left: e.pageX - x }); $("#imgShow").css({ top: e.pageY - y - 70, left: e.pageX - x - 130 }); } }); // file控件响应事件 $("#fileUpload").change(function () { var tmp = this.value.split('\\'); var fileName = tmp[tmp.length - 1].split('.'); document.forms["fmPhoto"].submit(); }); // 表单验证和ajax提交， var valid = $("#fmPhoto").validate({ submitHandler: function () { $("#ImgWidth").val(obj.width()); $("#ImgHeight").val(obj.height()); $("#ImgTop").val(70 - parseInt(obj.css("top"), 10)); $("#ImgLeft").val(130 - parseInt(obj.css("left"), 10)); $.ajax({ url: "http://localhost:22397/Home/Photo", cache: false, type: "post", data: $("#fmPhoto").serialize(), success: function (result) { if (!result) { var errormap = { SystemMsg: "系统忙，请稍后再试。" }; valid.showErrors(errormap, valid.errorlist); } else { if (result.Msg) { valid.showErrors(result.Msg.Map, valid.errorlist); } else { $("#imgUserPhoto").attr("src", result.VirtualPath + result.Name); } } } }); }, rules: { Name: { required: true, } } }); }); </script>
又一次封装的js代码：
$(function () {
window.Photo || (window.Photo = {
x: 0,
y: 0,
w: 0,
h: 0,
l: 0,
t: 0,
mousedown: 0,
html: '<form method="post" id="PhotoForm" target="hidFrame" enctype="multipart/form-data" action="{action}" style="width:600px;margin:0px auto;position:relative;">'
+ '<iframe id="hidFrame" name="hidFrame" style="display:none"></iframe>'
+ ' <div style="width: 480px; height: 360px; position: relative; float: left; overflow: hidden;">'
+ ' <img id="imgPhoto" src="{img}" onerror="this.src =\'../../Images/Account/DefaultPhoto.png\'" style="position:relative;" />'
+ ' <div id="cover" style="width: 800px;height: 800px;z-index: 100;position: absolute;border: 350px solid rgba(48, 168, 48, 0.5);border-bottom-left-radius: 50%;border-bottom-right-radius: 50%;border-top-left-radius: 50%;border-top-right-radius: 50%;top: -220px;left: -160px;"></div>'
+ ' </div>'
+ ' <div id="showImage" style="width: 100px;height: 100px;display: none;position: relative;overflow: hidden;float: left;border-radius: 50%;">'
+ ' <img alt="" id="imgShow" src="{img}" onerror="this.src=\'../../Images/Account/DefaultPhoto.png\'" style="position: relative;" />'
+ ' </div>'
+ ' <div style="color:Gray;clear:left; margin-bottom:20px;">图片格式为jpg。图片最大为2M</div>'
+ ' <div style="border:1px solid gray;position:relative; width:100px; height:40px;line-height:40px; text-align:center; vertical-align:middle;font-size:18px;display:inline-block;">'
+ ' 请选择图像'
+ ' <input type="file" id="fileUpload" name="ImageFile" style="position: absolute; width: 100%; height: 100%; filter: alpha(opacity=0); opacity: 0; top: 0; left: 0;" />'
+ ' </div>'
+ ' <a href="#" style="width:60px;height:30px; margin:10px 0 0 238px;">Cancel</a>'
+ ' <input type="button" style="width:60px;height:30px; margin:10px 0 0 30px;" id="btnSubmit" value="Save" />'
+ ' <input type="hidden" id="CallBcakFunction" name="CallBcakFunction" value="window.parent.Photo.UploadCallBack" />'
+ ' <input type="hidden" id="ImgWidth" name="width" />'
+ ' <input type="hidden" id="ImgHeight" name="height" />'
+ ' <input type="hidden" id="ImgTop" name="top" />'
+ ' <input type="hidden" id="ImgLeft" name="left" />'
+ '</form>',
UploadCallBack: function (msg) {
if (msg.indexOf("上传图片出错") != -1) {
alert("系统忙，请稍后再试！");
} else {
Photo.image.attr('src', msg);
}
},
show: function (containner,action,saveurl,img) {
Photo.Content = Photo.Content ? Photo.Content : $(Photo.html.replace('{action}', action).replace('{img}', img)).appendTo($(containner));
Photo.view = $("#imgShow"),
Photo.image = $("#imgPhoto"),
Photo.cover = $("#cover"),
Photo.watch = $("#showImage");
$("#fileUpload").change(function () {
var tmp = this.value.split('\\');
var fileName = tmp[tmp.length - 1].split('.');
Photo.Content.submit();
});
$("#btnSubmit").on('click', function () {
$("#ImgTop").val(parseInt(130 - Photo.t, 10));
$("#ImgLeft").val(parseInt(190 - Photo.l, 10));
$("#ImgWidth").val(parseInt(Photo.w, 10));
$("#ImgHeight").val(parseInt(Photo.h, 10));
$.ajax({
url: saveurl,
cache: false,
type: "post",
data: $("#PhotoForm").serialize(),
success: function (result) {
if (!result) {
var errormap = { SystemMsg: "系统忙，请稍后再试。" };
valid.showErrors(errormap, valid.errorlist);
} else {
if (result.Msg) {
valid.showErrors(result.Msg.Map, valid.errorlist);
} else {
$("#imgUserPhoto").attr("src", result.VirtualPath + result.Name);
}
}
}
});
});
$(document).mousemove(function (e) {
if (Photo.mousedown) {
Photo.t += e.pageY - Photo.y;
Photo.l += e.pageX - Photo.x;
Photo.image.css({ top: Photo.t, left: Photo.l });
Photo.view.css({ top: Photo.t - 130, left: Photo.l - 190 });
Photo.x = e.pageX;
Photo.y = e.pageY;
}
});
Photo.image.on("load", function (e) {
var img = new Image();
img.src = this.src;
var ow = img.width, oh = img.height,
b = 3 * Photo.w > 4 * Photo.h;
Photo.w = b ? 480 : (ow * 360 / oh);
Photo.h = b ?
(oh * 480 / ow) : 360; Photo.l = (480 - Photo.w) / 2, Photo.t = (360 - Photo.h) / 2; Photo.image.css({ width: Photo.w, height: Photo.h, top: Photo.t, left: Photo.l }); Photo.view.css({ width: Photo.w, height: Photo.h, top: Photo.t - 130, left: Photo.l - 190 }).attr('src', this.src); }); Photo.cover.on("mousedown", function (e) { e.stopPropagation(); Photo.mousedown = true; Photo.cover.css("cursor", "move"); Photo.watch.show(); Photo.x = e.pageX; Photo.y = e.pageY; }).on("mouseup", function (e) { e.stopPropagation(); Photo.mousedown = false; Photo.cover.css("cursor", "default"); Photo.watch.hide(); }).on("mousewheel", function (e) { e.stopPropagation(); var wm = e.originalEvent.wheelDelta > 0 ? 1 : -1; nw = Photo.w * (10 + wm) / 10;//可适当改动 nh = Photo.h * (10 + wm) / 10; if (nw > 100 && nh > 100) { Photo.l = Photo.l + (Photo.w - nw) / 2; Photo.t = Photo.t + (Photo.h - nh) / 2; Photo.w = nw; Photo.h = nh; Photo.image.css({ width: Photo.w, height: Photo.h, top: Photo.t, left: Photo.l }); Photo.view.css({ width: Photo.w, height: Photo.h, top: Photo.t - 130, left: Photo.l - 190 }); } }); } }); Photo.show($('#customPhoto'), 'ReciveUpload', 'http://localhost:7427/Home/Photo', '@Model.xPhoto'); });
后台的相关方法也放这吧，有须要的能够直接拿去用
public ActionResult Photo()
{
var guid = Cookies.ReadCookie("UserGuid");
var account = DAL.xV_Account.GetAccountByCode(Guid.Parse(guid));
Session["account"] = account;
return View(account);
}
[HttpPost]
public JsonResult Photo(int width,int height,int left,int top)
{
var account = Session["account"] as DAL.xV_Account;
var p = Session["tmpImage"] as string;
if (!string.IsNullOrWhiteSpace(p))
{
ImageHelper.CutImage(Image.FromFile(p), width, height, left, top, 100, 100, p, account.xAccountCode);
account.xPhoto = "http://" + Request.Url.Authority + "/Images/Photos/" + account.xAccountCode + ".jpg";
DAL.xV_Account.UpdatePhoto(account);
}
return Json(account);
}
/// <summary>
/// 接收页面无刷新提交的文档（本例为图片）。并保存在暂时文件夹中，用Session记录文件夹
/// </summary>
/// <returns></returns>
public ActionResult ReciveUpload()
{
string result = "<script type='text/javascript'>" + Request["CallBcakFunction"] + "('";
try
{
var account = Session["account"] as DAL.xV_Account;
var p = Session["tmpImage"] as string;
string fileName = Request.Files[0].FileName.Substring(Request.Files[0].FileName.LastIndexOf('\\') + 1);
if (p == null)
{
p = "D:\\WorkSpace\\Project\\Viva\\Viva\\Images\\Photos\\" + account.xAccountCode + ".jpg";
}
Session["tmpImage"] = p;
//保存原图
ImageHelper.SaveImage(Request.Files[0], p.Substring(0, p.LastIndexOf('\\')), account.xAccountCode + ".jpg", new string[] { "jpg","jpeg" }, 5);
//返回保存的缩略图的路径
result += "http://" + Request.Url.Authority + "/Images/Photos/" + account.xAccountCode + ".jpg";
}
catch
{
result += "上传图片出错！
请稍后再试，或寻求管理员的帮助."; } return Content(result + "');</script>"); } public static bool CutImage(Image image, int sWidth, int sHeight, int left, int top, int width, int height, string path, string name) { //用指定的大小和格式初始化 Bitmap 类的新实例 var bitmap = new Bitmap(sWidth, sHeight, PixelFormat.Format32bppArgb); //从指定的 Image 对象创建新 Graphics 对象 var graphics = Graphics.FromImage(bitmap); //清除整个画图面并以透明背景色填充 graphics.Clear(Color.Transparent); //在指定位置而且按指定大小绘制 原图片 对象 graphics.DrawImage(image, new Rectangle(0, 0, sWidth, sHeight)); graphics.Dispose(); // 目标区域 var destRect = new Rectangle(0, 0, width, height); // 源图区域 var srcRect = new Rectangle(left, top, width, height); // 新建Graphics对象 var newImage = new Bitmap(width, height); var g = Graphics.FromImage(newImage); // 画图平滑程序 g.SmoothingMode = SmoothingMode.HighQuality; // 图片输出质量 g.CompositingQuality = CompositingQuality.HighQuality; // 输出到newImage对象 g.DrawImage(bitmap, destRect, srcRect, GraphicsUnit.Pixel); // 释放画图对象 g.Dispose(); // 保存图像 if (File.Exists(path + name)) { File.Delete(path + name); } newImage.Save(path + name); return true; }
上面有个SaveImage方法，点此查看
本文转自mfrbuaa博客园博客，原文链接：http://www.cnblogs.com/mfrbuaa/p/5250024.html，如需转载请自行联系原作者
