1 引用文件
jquery.imgareaselect.min.cs
imgareaselect-default.js
2 代码
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="SWFUpload_Demo.aspx.cs" Inherits="BookShop.Web.Test.SWFUpload_Demo" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script src="../../js/jquery-1.7.1.js"></script>
<script src="../handlers.js"></script>
<script src="../swfupload.js"></script>
<script src="../../js/jquery.imgareaselect.min.js"></script>
<link href="../../Css/imgareaselect-default.css" rel="stylesheet" />
<script type="text/javascript">
var swfu;
window.onload = function () {
swfu = new SWFUpload({
//指定要上传的路径
upload_url: "/ashx/FileUpload.ashx?action=upload",
async: true,
post_params: {
"ASPSESSID": "<%=Session.SessionID %>"
}, // File Upload Settings
file_size_limit: "2 MB",
file_types: "*.jpg;*.gif",
file_types_description: "JPG Images",
file_upload_limit: , // Zero means unlimited // 事件处理了的三个主要方法定义在 Handlers.js
// The handlers are not part of SWFUpload but are part of my website and control how
// my website reacts to the SWFUpload events.
swfupload_preload_handler: preLoad,
swfupload_load_failed_handler: loadFailed,
file_queue_error_handler: fileQueueError,
file_dialog_complete_handler: fileDialogComplete,
upload_progress_handler: uploadProgress,
upload_error_handler: uploadError,
upload_success_handler: showImage,
upload_complete_handler: uploadComplete, // 按钮设置
button_image_url: "/SWFUpload/images/XPButtonNoText_160x22.png",
button_placeholder_id: "spanButtonPlaceholder",
button_width: ,
button_height: ,
button_text: '<span class="button">请选择上传图片<span class="buttonSmall">(2 MB Max)</span></span>',
button_text_style: '.button { font-family: Helvetica, Arial, sans-serif; font-size: 14pt; } .buttonSmall { font-size: 10pt; }',
button_text_top_padding: ,
button_text_left_padding: , // Flash Settings
flash_url: "/SWFUpload/swfupload.swf", // Relative to this file
flash9_url: "/SWFUpload/swfupload_FP9.swf", // Relative to this file custom_settings: {
upload_target: "divFileProgressContainer"
}, // Debug Settings
debug: false
});
}
//上传成功以后调用该方法
function showImage(file, serverData) {
var data = serverData.split(':');
//将上传成功的图片作为div的背景
console.log(data[]);
$("#selectbanner").attr("src", data[]);
$('#selectbanner').imgAreaSelect({
selectionColor: 'blue', x1: , y1: , x2: ,
y2: , selectionOpacity: 0.2, onSelectEnd: preview
});
};
//选择结束以后调用该方法
function preview(img, selection) {
$('#selectbanner').data('x', selection.x1);
$('#selectbanner').data('y', selection.y1);
$('#selectbanner').data('w', selection.width);
$('#selectbanner').data('h', selection.height);
};
//裁剪确认操作 $(function () {
$("#btnCut").click(function () { var pic = $('#selectbanner').attr('src');
var x, y, w, h;
$.post(
"/ashx/FileUpload.ashx",
{
"x": $('#selectbanner').data('x'),
"y": $('#selectbanner').data('y'),
"w": $('#selectbanner').data('w'),
"h": $('#selectbanner').data('h'),
"pic": pic,
"action": "cut",
},
function (data) {
//把裁剪后图片加载到原处
$('#selectbanner').attr("src", data);
}
) //var pars = {
// "x": $('#selectbanner').data('x'), // "y": $('#selectbanner').data('y'), // "w": $('#selectbanner').data('w'), // "h": $('#selectbanner').data('h'),
// "action": "cut",
// "pic": $("#selectbanner").attr("src") //}; //$.post("/ashx/FileUpload.ashx", pars, function (data) {
// $("#showPhoto").attr("src",data);
//}); });
}) </script>
</head>
<body>
<form id="form1" runat="server"> <div id="content">
<div id="swfu_container" style="margin: 0px 10px;">
<div>
<span id="spanButtonPlaceholder"></span>
</div> <div id="divFileProgressContainer" style="height: 75px;"></div>
<div id="thumbnails"></div>
<input type="button" value="截取图片" id="btnCut" />
<img id="selectbanner" />
<img id="showPhoto" /> </div>
</div>
</form>
</body>
</html>
前台
using BookShopManager.Web.Common;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Web; namespace BookShopManager.Web.Ashx
{
/// <summary>
/// FileUpload 的摘要说明
/// </summary>
public class FileUpload : IHttpHandler
{ public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
string action = context.Request["action"];
if (action == "upload")
{
ProcessFileUpload(context);//图片上传
}
else if (action == "cut")
{
ProcessCutPhoto(context);//截取图片
}
else
{
context.Response.Write("参数错误");
}
} private static void ProcessFileUpload(HttpContext context)
{
HttpPostedFile file = context.Request.Files["Filedata"];
if (file != null)
{
string fileName = Path.GetFileName(file.FileName);
string fileExt = Path.GetExtension(fileName);
if (fileExt == ".jpg")
{
string dir = "/FileUpload/" + DateTime.Now.Year + DateTime.Now.Month + DateTime.Now.Day + "/";
if (!Directory.Exists(context.Request.MapPath(dir)))
{
Directory.CreateDirectory(context.Request.MapPath(dir));
}
string newFileName = Guid.NewGuid().ToString();
string fullDir = dir + newFileName + fileExt;
file.SaveAs(context.Request.MapPath(fullDir));
context.Response.Write(fullDir);
}
}
}
private void ProcessCutPhoto(HttpContext context)
{
int x = ConvertHelper.ToInt(context.Request["x"]);
int y = ConvertHelper.ToInt(context.Request["y"]);
int w = ConvertHelper.ToInt(context.Request["w"]);
int h = ConvertHelper.ToInt(context.Request["h"]);
string imgSrc = context.Request["pic"];//获取上传成功的图片路径
using (Bitmap map = new Bitmap(w, h))
{
using (Graphics g = Graphics.FromImage(map))
{
using (Image img = Image.FromFile(context.Request.MapPath(imgSrc)))
{
g.DrawImage(img, new Rectangle(, , w, h), new Rectangle(x, y, w, h), GraphicsUnit.Pixel);
string newFileName = Guid.NewGuid().ToString();
string fullDir = "/FileUpload/" + newFileName + ".jpg";
map.Save(context.Request.MapPath(fullDir), System.Drawing.Imaging.ImageFormat.Jpeg);
context.Response.Write(fullDir);
}
}
}
} public bool IsReusable
{
get
{
return false;
}
}
}
}
后台
3 示例