利用swfupload上传头像，利用Jcrop来实现头像在线选择，然后提交个ashx对原头像进行剪切。代码如下：
default.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="Jcrop._default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Jcrop测试</title>
<script type="text/javascript" src="JS/jquery-1.8.3.min.js"></script>
<script type="text/javascript" src="JS/swfupload/swfupload.js"></script>
<script type="text/javascript" src="JS/swfupload/handlers.js"></script>
<script type="text/javascript" src="JS/Jcrop/js/jquery.Jcrop.min.js"></script>
<script type="text/javascript" src="JS/Jcrop/js/jquery.color.js"></script>
<script type="text/javascript" src="JS/mytest.js"></script>
<link href="JS/Jcrop/css/jquery.Jcrop.min.css" rel="Stylesheet" type="text/css" />
<link href="CSS/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
var swfu;
window.onload = function () {
swfu = new SWFUpload({
upload_url: "imgUpload.ashx",
post_params: {
"ASP.NET_SESSIONID": "<%=Session.SessionID %>",
"ASPSESSID": "<%=Session.SessionID %>"
},
file_size_limit: "1024",
file_types: "*.jpg",
file_types_description: "JPG Images",
file_upload_limit: "-1",
file_queue_error_handler: fileQueueError,
file_dialog_complete_handler: fileDialogComplete,
upload_progress_handler: uploadProgress,
upload_error_handler: uploadError,
upload_success_handler: uploadSuccess,
upload_complete_handler: uploadComplete,
button_image_url: "/Image/swfupload/XPButtonNoText_160x22.png",
button_width: "160",
button_height: "22",
button_placeholder_id: "spanButtonPlaceHolder1",
button_text: '<span class="theFont">选择文件</span>',
button_text_style: ".theFont { font-size: 13;}",
button_text_left_padding: 12,
button_text_top_padding: 3,
button_action: SWFUpload.BUTTON_ACTION.SELECT_FILE, //SWFUplaod.BUTTON_ACTION.SELECT_FILES 可以多选文件
flash_url: "/JS/swfupload/swfupload.swf",
custom_settings: {
upload_target: "divFileProgressContainer1"
},
debug: false
});
}
</script>
</head>
<body>
<form id="form1" runat="server">
<table>
<tr>
<td height="25" width="30%" align="right">
用户头像 ：
</td>
<td height="25" width="*" align="left">
<div id="swfu_container1" style="margin: 0px 10px;">
<div>
<span id="spanButtonPlaceHolder1"></span>
</div>
<div id="divFileProgressContainer1" style="height: 75px;">
</div>
<div id="thumbnails1">
<div id="div_addPhoto">
<img alt="用户头像" id="img_UserPhoto1" name="img_UserPhoto1" />
</div>
<input type="hidden" runat="server" id="userphoto1" />
</div>
<div id="div_photoadd" style="width: 100px; height: 100px; overflow: hidden; display: none">
<img alt="用户头像" id="viewUserPhoto" />
</div>
<input type="button" id="btn_imgcut" style="display: none" onclick="checkCoords($('#x').val(), $('#y').val(), $('#w').val(), $('#h').val(), $('#userphoto1').val())"
value="剪切头像" />
<input type="hidden" id="x" name="x" />
<input type="hidden" id="y" name="y" />
<input type="hidden" id="w" name="w" />
<input type="hidden" id="h" name="h" />
</div>
</td>
</tr>
</table>
</form>
</body>
</html>
mytest.js
//*************头像剪切 Code By:5653325 *******************
var xy_x, xy_y;
function JcropInit() {
$('#img_UserPhoto1').Jcrop({
bgOpacity: 0.5,
onChange: updateCoords,
onSelect: updateCoords,
keySupport: false,
aspectRatio: 1,
bgColor: 'white',
addClass: 'jcrop-normal'
}, function () {
var xy = this.getBounds();
xy_x = xy[0];
xy_y = xy[1];
api = this;
api.setSelect([1, 1, 100, 100]);
api.setOptions({ bgFade: true, bgColor: $.Jcrop.defaults.bgColor, bgOpacity: $.Jcrop.defaults.bgOpacity });
});
};
function updateCoords(c) {
if (parseInt(c.w) > 0) {
var rx = 100 / c.w;
var ry = 100 / c.h;
$('#viewUserPhoto').css({
width: Math.round(rx * xy_x) + 'px',
height: Math.round(ry * xy_y) + 'px',
marginLeft: '-' + Math.round(rx * c.x) + 'px',
marginTop: '-' + Math.round(ry * c.y) + 'px'
});
}
$('#x').val(c.x);
$('#y').val(c.y);
$('#w').val(c.w);
$('#h').val(c.h);
};
//头像剪切
function checkCoords(x, y, w, h, f) {
if (x < 0 || y < 0 || w < 10 || h < 10) {
alert('选择图片太小，无法剪切。');
return false;
}
else {
$.ajax({
type: "POST",
data: "cmd=cut&t=" + Math.random() + "&x=" + x + "&y=" + y + "&w=" + w + "&h=" + h + "&f=" + f,
url: "imgCut.ashx",
contentType: "application/x-www-form-urlencoded; charset=utf-8",
dataType: "text",
success: function (text) {
var dataobj = eval（text);
if (dataobj[0].count == 0) {
alert(dataobj[0].list[0].error);
}
else {
$('#div_addPhoto').empty();
$('#div_addPhoto').append("<img alt='用户头像' id='img_UserPhoto1' name='img_UserPhoto1' />");
$("#img_UserPhoto1").attr("src", dataobj[0].list[0].path + "?t=" + Math.random());
$("#viewUserPhoto").attr("src", dataobj[0].list[0].path + "?t=" + Math.random());
$("#div_photoadd").css("display", 'none');
$("#btn_imgcut").css("display", 'none');
}
},
error: function (request, message, ex) {
alert("错误：" + message);
}
});
}
};
swfupload下的handler.js的某个函数修改
function uploadSuccess(file, serverData) {
try
{
//*************头像剪切******
$('#div_addPhoto').empty();
$('#div_addPhoto').append("<img alt='用户头像' id='img_UserPhoto1' name='img_UserPhoto1' />");
$("#img_UserPhoto1").attr("src", serverData + "?t=" + Math.random());
$("#userphoto1").val(serverData);
$("#viewUserPhoto").attr("src", serverData + "?t=" + Math.random());
$("#div_photoadd").css("display", '');
$("#btn_imgcut").css("display", '');
JcropInit();
} catch (ex) {
this.debug(ex);
}
}图片上传ashx（imageupload.ashx）
<%@ WebHandler Language="C#" Class="imgUpload" %>
using System;
using System.Web;
using System.IO;
public class imgUpload : IHttpHandler
{
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
string updir = context.Server.MapPath(@"~\Upload\userphoto") + "\\";
if (context.Request.Files.Count > 0)
{
try
{
for (int j = 0; j < context.Request.Files.Count; j++)
{
HttpPostedFile uploadFile = context.Request.Files[j];
if (uploadFile.ContentLength > 0)
{
if (!Directory.Exists(updir))
{
Directory.CreateDirectory(updir);
}
string extname = Path.GetExtension(uploadFile.FileName);
string fullname =Guid.NewGuid().ToString();
string filename = uploadFile.FileName;
uploadFile.SaveAs(string.Format("{0}{1}", updir, fullname + extname));
context.Response.Write(string.Format(@"/Upload/userphoto/{0}", fullname + extname));
}
}
}
catch (Exception ex)
{
context.Response.Write("Message" + ex.ToString());
}
}
}
public bool IsReusable {
get {
return false;
}
}
}
图片剪切的ashx(imgcut.ashx)
<%@ WebHandler Language="C#" Class="imgCut" %>
using System;
using System.Web;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.IO;
public class imgCut : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
int x = 1, y = 1, w = 1, h = 1;
string f = string.Empty;
if (context.Request["x"] == null || context.Request["y"] == null || context.Request["w"] == null || context.Request["h"] == null)
{
context.Response.Write("[{count:0,list:[{\"error\":\"参数不正确。\"}]}]");
context.Response.End();
}
if (context.Request["f"] == null)
{
context.Response.Write("[{count:0,list:[{\"error\":\"没有图片文件。\"}]}]");
context.Response.End();
}
else
{
f = context.Request["f"].ToString().Replace("/", "\\");
}
try
{
x = int.Parse(context.Request["x"].ToString());
y = int.Parse(context.Request["y"].ToString());
w = int.Parse(context.Request["w"].ToString());
h = int.Parse(context.Request["h"].ToString());
}
catch
{
context.Response.Write("[{count:0,list:[{\"error\":\"参数不能被识别。\"}]}]");
context.Response.End();
}
if (!File.Exists(context.Server.MapPath("~\\" + f)))
{
context.Response.Write("[{count:0,list:[{\"error\":\"图片文件不存在。\"}]}]");
context.Response.End();
}
Bitmap b;
Graphics g;
using (Image img = System.Drawing.Image.FromFile(context.Server.MapPath("~\\" + f)))
{
b = new Bitmap(w, h, img.PixelFormat);
b.SetResolution(img.HorizontalResolution, img.VerticalResolution);
g = Graphics.FromImage(b);
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.DrawImage(img, new Rectangle(0, 0, w, h),new Rectangle(x, y, w, h), GraphicsUnit.Pixel);
img.Dispose();
}
string ff = context.Server.MapPath("~\\" + f);
b.Save(ff);
b.Dispose();
g.Dispose();
context.Response.Write("[{count:1,list:[{\"path\":\"" + f.Replace("\\", "/") + "\"}]}]");
context.Response.End();
}
public bool IsReusable
{
get
{
return false;
}
}
}
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