swfupload实现多文件上传，多文件选择（asp.net版本）
swfupload可以实现一次选择多个文件，并且上传！可以上传缩略图，也可以上传原图！
现在就给大家分享一下吧！
1.从官网上下载asp.net程序包
2.修改部分文件，适合自己！总体思路是：
1.修改类Thumbnail，添加缩略图成员
2.修改上传控件,创建内存流存储缩略图数据流
3.上传保存，从Thumbnail类中读取数据流，使用文件流保存图片
并保存到数据库中。
网易的博客好像不能添加附件啊！那我就给大家展示代码吧！如果谁需要源码给我留个邮箱，我会一一发送的！
default前台
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>多文件上传工具</title>
<link href="../css/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="../swfupload/swfupload.js"></script>
<script type="text/javascript" src="js/handlers.js"></script>
<script type="text/javascript">
var swfu;
window.onload = function () {
swfu = new SWFUpload({
// 后端设置
upload_url: "upload.aspx",
post_params : {
"ASPSESSID" : "<%=Session.SessionID %>"
},
// 上传文件设置
file_size_limit : "2 MB",
file_types : "*.jpg",
file_types_description : "JPG Images",
file_upload_limit : 0,
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 : uploadSuccess,
upload_complete_handler : uploadComplete,
// 浏览图片按钮设置
button_image_url : "images/select.png", //图片路径
button_placeholder_id : "spanButtonPlaceholder", //所要加载的控件id
button_width: 48,
button_height: 22,
button_text : '<span class="button">选 择</span>',
button_text_style: '.button { font-family: Helvetica, Arial, sans-serif; font-size: 13px; } .buttonSmall { font-size: 10pt; }',
button_text_top_padding: 1,
button_text_left_padding: 5,
// Flash Settings
flash_url: "../swfupload/swfupload.swf",
flash9_url : "../swfupload/swfupload_FP9.swf",
custom_settings : {
upload_target : "divFileProgressContainer"//所选择图片呈现的位置id
},
// Debug Settings
debug: false
});
}
</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>
<asp:Button ID="btnSave" runat="server" OnClick="btnSave_Click" Text="上 传" /> </br>
<asp:Button ID="btnClear" runat="server" Text="删 除" OnClick="btnClear_Click" />
</div>
<div id="divFileProgressContainer" style="height: 75px;"></div>
<div id="thumbnails"></div>
</div>
</div>
</form>
default后台
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.SessionState;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Generic;
using System.IO;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Session.Clear();
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
if (Session["file_info"] != null)
{
List<Thumbnail> thumbnails = Session["file_info"] as List<Thumbnail>;
string UploadPath = Server.MapPath("upload/");
foreach (Thumbnail img in thumbnails)
{
FileStream fs = new FileStream(UploadPath + img.ID + ".jpg", FileMode.Create);
BinaryWriter bw = new BinaryWriter(fs);
bw.Write(img.miniData);//上传原图
// bw.Write(img.Data);//上传缩略图
bw.Close();
fs.Close();
}
Response.Write("<script>alert('图片上传成功！');</script>");
Session.Clear();
}
}
protected void btnClear_Click(object sender, EventArgs e)
{
Session.Clear();
}
}
upload.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Collections.Generic;
public partial class upload : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
System.Drawing.Image thumbnail_image = null;
System.Drawing.Image original_image = null;
System.Drawing.Bitmap final_image = null;
System.Drawing.Graphics graphic = null;
MemoryStream ms = null;//缩略图信息流
MemoryStream maxms = null;//原图信息流
try
{
// 获取数据
HttpPostedFile jpeg_image_upload = Request.Files["Filedata"];
// 上传的图像检索
original_image = System.Drawing.Image.FromStream(jpeg_image_upload.InputStream);
int width = original_image.Width;
int height = original_image.Height;
// 计算新的宽度和高度
int target_width = 100;
int target_height = 100;
int new_width, new_height;
float target_ratio = (float)target_width / (float)target_height;
float image_ratio = (float)width / (float)height;
if (target_ratio > image_ratio)
{
new_height = target_height;
new_width = (int)Math.Floor(image_ratio * (float)target_height);
}
else
{
new_height = (int)Math.Floor((float)target_width / image_ratio);
new_width = target_width;
}
new_width = new_width > target_width ? target_width : new_width;
new_height = new_height > target_height ? target_height : new_height;
//创建缩略图
final_image = new System.Drawing.Bitmap(target_width, target_height);
graphic = System.Drawing.Graphics.FromImage(final_image);
graphic.FillRectangle(new System.Drawing.SolidBrush(System.Drawing.Color.Black), new System.Drawing.Rectangle(0, 0, target_width, target_height));
int paste_x = (target_width - new_width) / 2;
int paste_y = (target_height - new_height) / 2;
graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; /* new way */
graphic.DrawImage(original_image, paste_x, paste_y, new_width, new_height);
// 存储缩略图数据流
ms = new MemoryStream();
final_image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
// 存储原图数据流
maxms = new MemoryStream();
original_image.Save(maxms, System.Drawing.Imaging.ImageFormat.Jpeg);
string thumbnail_id = DateTime.Now.ToString("yyyyMMddHHmmssfff");
Thumbnail thumb = new Thumbnail(thumbnail_id, ms.GetBuffer(), maxms.GetBuffer());
// 把所有的都放到session中
List<Thumbnail> thumbnails = Session["file_info"] as List<Thumbnail>;
if (thumbnails == null)
{
thumbnails = new List<Thumbnail>();
Session["file_info"] = thumbnails;
}
thumbnails.Add(thumb);
Response.StatusCode = 200;
Response.Write(thumbnail_id);
}
catch
{
// 如果发生任何类型的错误返回一个500内部服务器错误
Response.StatusCode = 500;
Response.Write("An error occured");
Response.End();
}
finally
{
// 清除
if (final_image != null) final_image.Dispose();
if (graphic != null) graphic.Dispose();
if (original_image != null) original_image.Dispose();
if (thumbnail_image != null) thumbnail_image.Dispose();
if (ms != null) ms.Close();
Response.End();
}
}
}
Thumbnail类
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
/// <summary>
///缩略图成员
/// </summary>
public class Thumbnail
{
public Thumbnail(string id, byte[] data, byte[] minidata)
{
this.ID = id;
this.Data = data;//缩略图信息流
this.miniData = minidata;//原图信息流
}
private string id;
public string ID
{
get
{
return this.id;
}
set
{
this.id = value;
}
}
private byte[] thumbnail_data;
public byte[] Data
{
get
{
return this.thumbnail_data;
}
set
{
this.thumbnail_data = value;
}
}
private byte[] max_data;
public byte[] miniData
{
get
{
return this.max_data;
}
set
{
this.max_data = value;
}
}
}
