Asp.net上传

bhtfg538 2008-06-26 11:05:27
我新 手·
最近涉及到Asp.net上传
我知道有 FileUploadweb控件。
当然我还是担心安全方面的问题 原来我使用asp 是自己写的组件
今天写了个类
不知道有没有必要，也是一时兴起。主要方便以后经常使用 省得复制代码
朋友们多帮我看看～ 或者有 什么好的上传类 发给我 贴出来
我的 邮箱：beyondmj0.student@sina.com
我的代码：


using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.IO;

using System.Text;

using System.Text.RegularExpressions;

using System.Web.Services.Description;



/// <summary>

///fileupload 的摘要说明

/// </summary>

public class fileupload

{

    private int FileSize;//默认文件大小

    private string FilePath;//默认文件路径

    private string FileName;//默认文件名字

    private string[] FileFormat;//默认文件格式

    private string ErrorMsg;//默认错误信息

    private string[] FileType;//默认文件MINE类型

    private int UploadFileSize;

    private string UploadFileName;

    private string UploadFilePath;

	public fileupload()

	{

        FileSize = 20480;//2mb

        FilePath = @"C:\Inetpub\wwwroot\upload\";

        FileName = Regex.Replace(DateTime.Now.ToString(), "( |:|-|上午|下午)", "");

        FileFormat = new string[] { "jpg", "jpeg", "gif", "png","bmp"};

        FileType = new string[] { "image" };

        ErrorMsg = null;

	}

    public string Msg

    {

        get

        {

            return ErrorMsg;

        }

        set

        {

            ErrorMsg = value;

        }

    }

    public int GetSize

    {

        get

        {

            return UploadFileSize;

        }

        

    }

    public string GetName

    {

        get

        {

            return UploadFileName;

        }

        

    }

    public string GetPath

    {

        get

        {

            return UploadFilePath;

        }

      

    }

  

    public fileupload(int size, string path, string[] format,string[] type)

    {

        FileSize = size;

        FilePath = path;

        FileFormat = format;

        FileType = type;

    }

    public fileupload(string path)

    {

        FilePath = path;

    }

    public bool FileUpload(FileUpload fu)

    {

        string CurrentFileName = fu.FileName.Trim();//取得当前文件名字

        string CurrentFullName = fu.PostedFile.FileName.Trim();//取得当前文件整个名字

        int CurrentFileSize = fu.PostedFile.ContentLength;//取得当前文件大小

        string CurrentFileType = fu.PostedFile.ContentType.Trim();//取得当前文件MINE类型

        StringBuilder sb=new StringBuilder();//返回字符串式的文件类型

        int ffl = FileFormat.Length;//文件格式的数组长度

        int fnl = CurrentFileName.Split('.').Length;//返回文件名数组的长度

        string[] cfns=CurrentFileName.Split('.');//返回文件名字的数组

        int ftl=FileType.Length;//返回Mine数组的长度

        StringBuilder sb1=new StringBuilder();//返回Mine数组字符串

        for(int i=0;i<ftl;i++)

        {

            if(i< ftl - 1)

            {

                sb1.Append(FileType[i].ToString().Trim()+"|");

            }

            else

             {

                 sb1.Append(FileType[i].ToString().Trim());

             }

        }

        for (int i = 0; i < ffl; i++)

        {

            if (i < ffl - 1)

             {

                sb.Append(FileFormat[i].ToString().Trim()+"|");

             }

            else

             {

                 sb.Append(FileFormat[i].ToString().Trim());

             }

           

        }

        Regex reg = new Regex(@"^[a-z]\:\\([^""\.\\\<\>\:\/\?\|][^""\\\<\>\:\/\?\|]+[^""\.\\\<\>\:\/\?\|]\\)*[^""\\\<\>\:\/\?\|]+\.(" + sb.ToString() + ")$", RegexOptions.IgnoreCase);

        try

        {

            if (fnl < 2)

            {

                Msg = "你上传的文件名出现错误。<br>";

                return false;

            }

            else

            {

                if (sb.ToString().IndexOf(cfns[fnl-1].ToString().Trim().ToLower()) >= 0 || sb.ToString().IndexOf(cfns[fnl-1].ToString().Trim().ToUpper()) >= 0)

                {

                    if (!reg.Match(CurrentFullName).Success)

                    {

                        Msg = Msg + "你上传的文件路径出现错误。<br>";

                        return false;

                    }

                    else

                    {



                        if (CurrentFileSize > FileSize)

                        {

                            Msg = Msg + "上传文件超过系统默认大小，" + "当前文件大小：" + (float)(CurrentFileSize/1024)+ "KB，系统默认大小：" + (float)(FileSize/1024)+"KB。<br>";

                            return false;

                        }

                        else

                        {

                            if (CurrentFileType.Split('/').Length>0)

                            {

                                if (sb1.ToString().IndexOf(CurrentFileType.Split('/')[0].ToString().Trim().ToLower()) >= 0)

                                {

                                    string filename = FileName + "." + cfns[1];

                                    UploadFileSize = CurrentFileSize;

                                    UploadFileName = filename;

                                    UploadFilePath = FilePath;

                   

                                        fu.PostedFile.SaveAs(FilePath + filename);

                                        return true;

                                    

                                }

                                else

                                {

                                    Msg = Msg + "上传文件MIME类型错误，你的MIME类型为："+CurrentFileType+"。<br>";

                                    return false;

                                }

                            }

                            else

                            {

                                Msg = Msg + "上传文件MIME类型错误，你的MIME类型为：" + CurrentFileType + "。<br>";

                                return false;

                            }

                        }

                    }

                }

                else

                {

                    Msg = "文件类型不正确，不能为：“" + cfns[fnl - 1] + "”的后缀名,系统默认文件类型为：" + sb.ToString().Replace('|', ',') + "。<br>";

                    return false;

                }

            }

        }

        catch (Exception ex)

        {

            Msg = Msg+ex.Message;

            return false;

        } 

       

    }

 

}
...全文
236 32 打赏 收藏 转发到动态 举报
AI 作业
写回复
用AI写文章
32 条回复
切换为时间正序
请发表友善的回复…
发表回复
yigeming 2008-06-27
  • 打赏
  • 举报
 回复
[Quote=引用 20 楼 s208ping 的回复:]
C# codeusing System;
using System.Collections;
using System.Collections.Specialized;
using System.Globalization;
using System.IO;
using System.Text;
using System.Web;
using System.Reflection;
public class HttpUploadModule : IHttpModule
{
private HttpApplication hApp;
public HttpUploadModule()
{

}
public int nState;
public void …
[/Quote]
EricPan2023 2008-06-27
  • 打赏
  • 举报
 回复
能支持Web上传多大的文件
david0620 2008-06-27
  • 打赏
  • 举报
 回复
支持大文件上傳不咯？例如1G的文件
stning 2008-06-27
  • 打赏
  • 举报
 回复
个人觉得20楼的比较好。
sxmonsy 2008-06-27
  • 打赏
  • 举报
 回复
楼主很强,帮你顶下.
s208ping 2008-06-27
  • 打赏
  • 举报
 回复 
using System;

using System.Collections;

using System.Collections.Specialized;

using System.Globalization;

using System.IO;

using System.Text;

using System.Web;

using System.Reflection;

public class HttpUploadModule : IHttpModule

	{

		private HttpApplication hApp;

		public HttpUploadModule()

		{



		}

		public int nState;

		public void Init(HttpApplication application)

		{

			hApp = application;

			application.BeginRequest += new EventHandler(this.Application_BeginRequest);

			application.EndRequest += new EventHandler(this.Application_EndRequest);

			application.Error += new EventHandler(this.Application_Error);

			nState = 1;

		}



		public void Dispose()

		{

		}



		private void Application_BeginRequest(Object sender, EventArgs e)

		{

			HttpApplication app = sender as HttpApplication;

			HttpWorkerRequest request = GetWorkerRequest(app.Context);

			Encoding encoding = app.Context.Request.ContentEncoding;



			int bytesRead = 0; // 已读数据大小

			int read; // 当前读取的块的大小

			int count = 8192; // 分块大小

			byte[] buffer; // 保存所有上传的数据

			string uploadId; // 唯一标志当前上传的ID

			Progress progress; // 记录当前上传的进度信息



			if (request != null)

			{



				// 返回 HTTP 请求正文已被读取的部分。

				//

				byte[] tempBuff = request.GetPreloadedEntityBody();

				// 如果是附件上传

				//

				if (tempBuff != null && IsUploadRequest(app.Request))

				{

					// 当前上传的ID，用来唯一标志当前的上传

					// 用此UploadID，可以通过其他页面获取当前上传的进度

					if (app.Context.Request.Cookies["UploadID"] == null)

					{

						HttpCookie hCookie = new HttpCookie("UploadID");

						hCookie.Value = Guid.NewGuid().ToString();

						app.Context.Response.Cookies.Add(hCookie);

					}

					uploadId = app.Context.Request.Cookies["UploadID"].Value.ToString();



					long length = long.Parse(request.GetKnownRequestHeader(HttpWorkerRequest.HeaderContentLength));

					//判断文件大小，超出了就不传

					System.Xml.XmlDocument xml = new System.Xml.XmlDocument();

					xml.Load(app.Context.Server.MapPath("~/web.config"));

					System.Xml.XmlNode node = xml.SelectSingleNode("configuration/system.web/httpRuntime");

					long nMaxLength = Convert.ToInt64(node.Attributes["maxRequestLength"].Value) * 1024;

					if (length > nMaxLength)

					{

						Fish.common.MessageBox("上传文件超出最大值,系统最大允许" + Fish.common.ConvertByte(nMaxLength), false);

						nState = -1;

						Application_EndRequest(sender, e);

						Fish.common.GoUrl(app.Context.Request.ServerVariables["http_referer"]);

					}

					// 获取上传大小

					//

					//将数据保存到文件里

					using(FileStream fs = File.Open(app.Context.Server.MapPath(uploadId + ".tmp"), FileMode.OpenOrCreate))

					{

						// 将已上传数据复制过去

						fs.Write(tempBuff, 0, tempBuff.Length);



						// 开始记录当前上传状态

						//

						progress = new Progress(length, uploadId);

						progress.SetState(UploadState.ReceivingData);



						//buffer = new byte[length];

						count = tempBuff.Length; // 分块大小



						// 开始记录已上传大小

						//

						bytesRead = tempBuff.Length;

						progress.SetBytesRead(bytesRead);

						SetProgress(uploadId, progress, app.Application);



						// 循环分块读取，直到所有数据读取结束

						//

						//测试  恢复count

						//count = 1;

						while (request.IsClientConnected() && !request.IsEntireEntityBodyIsPreloaded() && bytesRead < length)

						{

							// 如果最后一块大小小于分块大小，则重新分块

							//

							if (bytesRead + count > length)

							{

								count = (int)(length - bytesRead);

								tempBuff = new byte[count];

							}



							// 分块读取

							//

							read = request.ReadEntityBody(tempBuff, count);



							// 复制已读数据块

							//

							//----Buffer.BlockCopy(tempBuff, 0, buffer, bytesRead, read);

							fs.Write(tempBuff, 0, read);

							// 记录已上传大小

							//

							bytesRead += read;

							progress.SetBytesRead(bytesRead);

							SetProgress(uploadId, progress, app.Application);



						}

						if (request.IsClientConnected() && !request.IsEntireEntityBodyIsPreloaded())

						{



							// 传入已上传完的数据

							//

							fs.Close();

							fs.Dispose();

							FileStream fRead = File.Open(app.Context.Server.MapPath(uploadId + ".tmp"), FileMode.Open);



							buffer = new byte[fRead.Length];

							int nLen = fRead.Read(buffer, 0, (int)fRead.Length);

							fRead.Close();

							fRead.Dispose();

							InjectTextParts(request, buffer);

							buffer = null;

							// 表示上传已结束

							//

							progress.SetBytesRead(bytesRead);

							progress.SetState(UploadState.Complete);

							SetProgress(uploadId, progress, app.Application);



						}

						//删除文件

						tempBuff = null;

						fs.Close();

						fs.Dispose();

					}

					File.Delete(app.Context.Server.MapPath(uploadId + ".tmp"));

				}

			}

		}



		/// 结束请求后移除进度信息

		private void Application_EndRequest(Object sender, EventArgs e)

		{

			HttpApplication app = sender as HttpApplication;



			if (IsUploadRequest(app.Request) && nState > 0)

			{

				SetUploadState(app, UploadState.Complete);

				RemoveFrom(app);

			}



		}

		/// 如果出错了设置进度信息中状态为“Error”

		private void Application_Error(Object sender, EventArgs e)

		{

			HttpApplication app = sender as HttpApplication;



			if (IsUploadRequest(app.Request) && nState > 0)

			{

				SetUploadState(app, UploadState.Error);

			}



		}



		/// 设置当前上传进度信息的状态

		void SetUploadState(HttpApplication app, UploadState state)

		{

			string uploadId = app.Context.Request.Cookies["UploadID"].ToString();

			if (uploadId != null && uploadId.Length > 0)

			{

				Progress progress = GetProgress(uploadId, app.Application);

				if (progress != null)

				{

					progress.SetState(state);

					SetProgress(uploadId, progress, app.Application);

				}

			}

		}



		/// 设置当前上传的进度信息

		/// 根据UploadID记录在Application中

		void SetProgress(string uploadId, Progress progress, HttpApplicationState application)

		{

			if (uploadId == null || uploadId == string.Empty || progress == null)

				return;

			application.Lock();

			application["Fish_" + uploadId] = progress;

			application.UnLock();

		}



		/// <summary>

		/// 从Application中移出进度信息

		/// </summary>

		/// <param name="app"></param>

		void RemoveFrom(HttpApplication app)

		{

			string uploadId = app.Context.Request.Cookies["UploadID"].Value.ToString();

			HttpApplicationState application = app.Application;

			if (uploadId != null && uploadId.Length > 0)

			{

				application.Remove("Fish_" + uploadId);

				app.Context.Request.Cookies.Remove("UploadID");

			}

		}

		/// 根据UploadID获取上传进度信息

		public static Progress GetProgress(string uploadId, HttpApplicationState application)

		{

			Progress progress = application["Fish_" + uploadId] as Progress;

			return progress;

		}



		HttpWorkerRequest GetWorkerRequest(HttpContext context)

		{



			IServiceProvider provider = (IServiceProvider)HttpContext.Current;

			return (HttpWorkerRequest)provider.GetService(typeof(HttpWorkerRequest));

		}

		/// 传入已上传完的数据

		void InjectTextParts(HttpWorkerRequest request, byte[] textParts)

		{

			BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.NonPublic;



			Type type = request.GetType();



			while ((type != null) && (type.FullName != "System.Web.Hosting.ISAPIWorkerRequest"))

			{

				type = type.BaseType;

			}



			if (type != null)

			{

				type.GetField("_contentAvailLength", bindingFlags).SetValue(request, textParts.Length);

				type.GetField("_contentTotalLength", bindingFlags).SetValue(request, textParts.Length);

				type.GetField("_preloadedContent", bindingFlags).SetValue(request, textParts);

				type.GetField("_preloadedContentRead", bindingFlags).SetValue(request, true);

			}

		}



		private static bool StringStartsWithAnotherIgnoreCase(string s1, string s2)

		{

			return (string.Compare(s1, 0, s2, 0, s2.Length, true, CultureInfo.InvariantCulture) == 0);

		}

		/// 是否为附件上传

		bool IsUploadRequest(HttpRequest request)

		{

			return StringStartsWithAnotherIgnoreCase(request.ContentType, "multipart/form-data");

		}

	}
变成熊猫你就老实了是不 2008-06-27
  • 打赏
  • 举报
 回复
有许多开源项目，有文件管理的
fellowcheng 2008-06-27
  • 打赏
  • 举报
 回复
不如直接用前台:html + 后台:HttpFileCollection 实现,可以同时选择多个文件



//添加附件控件

function addFile(addNew)

{

    var trAtt = document.getElementById("trAtt");

    trAtt.style.display = "";

    if(addNew)

    {

        var tdAttachment = document.getElementById("attachmentId");

        if(tdAttachment)

        {

	        var oDiv	= document.createElement('div');

	        tdAttachment.appendChild(oDiv);

	        var oFile	= document.createElement('<input type="file" size="50" name="File" runat="server" >');

	        oDiv.appendChild(oFile);

	        var oButton	= document.createElement('<button onclick="removeme()">');

	        oButton.innerHTML	= '删除';

	        oDiv.appendChild(oButton);



//	        document.getElementById("appendLink").alt	= '继续添加附件';

	    }

	}

}







 /// <summary>

    /// 保存新加附件

    /// </summary>

    /// <returns></returns>

    private void SaveAttachment()

    {

        try

        {

            string strPath = ConfigurationManager.AppSettings["UploadFilesPath"];

            string RootPath = Server.MapPath(strPath + "/CorpRules/" + User.Identity.Name + "/");

            string virtualPath = "/CorpRules/" + User.Identity.Name + "/";

            if (!Directory.Exists(RootPath))

            {

                Directory.CreateDirectory(RootPath);

            }

            HttpFileCollection fileList = HttpContext.Current.Request.Files;

            for (int i = 0; i < fileList.Count; i++)

            {

                HttpPostedFile file = fileList[i];

                string fileN = file.FileName.Substring(file.FileName.LastIndexOf("\\") + 1);

                string fileName = RootPath + "\\" + fileN;



                if (file.ContentLength > 0)

                {

                    fileName = CheckFileName(fileName);

                    file.SaveAs(fileName);



                    int fileSize = file.ContentLength / 1024;



                    CorpRulesAttachment entTmp = (CorpRulesAttachment)Weith.Toolkit.Reflection.TypeAccessor.CreateInstance(typeof(CorpRulesAttachment));

                    entTmp.CorpRulesAttachmentID = Guid.NewGuid();

                    entTmp.Path = virtualPath + fileN;

                    entTmp.Size = fileSize;

                    attList.Add(entTmp);

                }

            }

        }

        catch (Exception)

        {

            DelFiles();

            Response.Redirect("~\\Error\\ServerError.aspx");

        }

    }
大自然D使者 2008-06-27
  • 打赏
  • 举报
 回复
没做过这么复杂，都是先用先写，反正就几行代码，又不多。
bhtfg538 2008-06-27
  • 打赏
  • 举报
 回复
饿。。。没准看 明白还不会做控件
industrial 2008-06-27
  • 打赏
  • 举报
 回复
楼上的这个控件是WroxUnited的吧:)
城市猎人0611 2008-06-27
  • 打赏
  • 举报
 回复
做成一个控件：PictureUpload.ascx
<%@ Control Language="C#" AutoEventWireup="true" codefile="PictureUpload.ascx.cs" inherits="PictureUpload" %>
<asp:FileUpload ID="FileUpload1" Runat="server" />
<asp:Button ID="btnUpload" Runat="server" Text="Upload Picture" OnClick="btnUpload_Click"
Width="127px" Height="21px" />
<asp:Label ID="Status" Runat="server"></asp:Label>

PictureUpload.ascx.cs文件：
using System;
using System.IO;
partial class PictureUpload : System.Web.UI.UserControl
{
// the class to return to the calling page
// - it simply contains the relative path of where the file was uploaded
public class FileUploadEventArgs : EventArgs
{
public FileUploadEventArgs(string FileName)
{
_fileName = FileName;
}

private string _fileName;
public string FileName
{
get {return _fileName;}
}
}
// define the delgate for the sucessful uploading event
public delegate void FileUploadedEventHandler( object sender, FileUploadEventArgs e);
// define the event for sucessful upload
public event FileUploadedEventHandler FileUploaded;
// the modes for uploading images
public enum ImageType
{
Match,
News,
Player,
Product
}
private ImageType _uploadImageType;
public ImageType UploadImageType
{
get {return _uploadImageType;}
set {_uploadImageType = value;}
}
protected void btnUpload_Click(object sender, System.EventArgs e)
{
string ImagesFolder = string .Empty;
string savePath;
string saveFile;

// upload the file
if (FileUpload1.HasFile)
{
// set the directories
switch (_uploadImageType)
{
case ImageType.Match:
ImagesFolder = "MatchImages";
break;
case ImageType.News:
ImagesFolder = "NewsImages";
break;
case ImageType.Player:
ImagesFolder = "PlayerImages";
break;
case ImageType.Product:
ImagesFolder = "ProductImages";
break;
}
savePath = Path.Combine(Request.PhysicalApplicationPath, ImagesFolder);

// save the image
saveFile = Path.Combine(savePath, FileUpload1.FileName);
FileUpload1.SaveAs(saveFile);

// for product images we also create a thumbnail
if (_uploadImageType == ImageType.Product)
{
string newPath = Path.Combine(savePath, "thumb_" + FileUpload1.FileName);
ImageHandling.GenerateThumbnail(saveFile, newPath);
}

// Notify the user that the file was uploaded successfully.
Status.Text = "Your file was uploaded successfully.";

// let the parent know that the file was uploaded
OnFileUploaded(new FileUploadEventArgs(FileUpload1.FileName));
}
else
{
// Notify the user that a file was not uploaded.
Status.Text = "You did not specify a file to upload.";
}
}
// declare the event method
protected virtual void OnFileUploaded( FileUploadEventArgs e)
{
// fire the delegate
FileUploaded(this, e);
}
}
bhtfg538 2008-06-27
  • 打赏
  • 举报
 回复
顺便太提问下
如果对方刷新下
又上传了一个

session 和 cookie 可以解决
有没有 其他好办法呢？

在 Ispostback 里面做做手脚


bhtfg538 2008-06-27
  • 打赏
  • 举报
 回复
思路是通过 正则匹配文件
而文件名字是通过正则匹配的

大家 你自己测试下
使用很简单 帮我检查有没 bug
bhtfg538 2008-06-27
  • 打赏
  • 举报
 回复
[Quote=引用 9 楼 iuhxq 的回复:]
DateTime.Now.ToString("yyyyMMddHHmmss")
[/Quote]谈感谢了
可以这样格式化字符
谢谢


大家有好的 类 共享出来哈


星际
玩了好多年了
现在 属于小强级别
呵呵 ～
tinalucky 2008-06-27
  • 打赏
  • 举报
 回复
有点晕~~
iuhxq 2008-06-27
  • 打赏
  • 举报
 回复
DateTime.Now.ToString("yyyyMMddHHmmss")


huming_h 2008-06-27
  • 打赏
  • 举报
 回复
看得出楼主比较喜欢星际争霸
huming_h 2008-06-27
  • 打赏
  • 举报
 回复
jf.
lzqlrr 2008-06-27
  • 打赏
  • 举报
 回复
mark ,study
加载更多回复（11）
asp.net+flash批量上传
asp.net上传 多文件上传 批量上传 上传代码 上载asp.net上传 多文件上传 批量上传 上传代码 上载asp.net上传 多文件上传 批量上传 上传代码 上载asp.net上传 多文件上传 批量上传 上传代码 上载asp.net上传 多文件...
asp.net上传下载讲解.wps
讲解asp.net上传下载的方法 还比较好
大文件上传源码，用ASP.NET上传大文件
用ASP.NET上传大文件，和基于大文件上传一下常用的控件。
非常不错的asp.net上传控件
非常不错的asp.net上传控件 非常不错的asp.net上传控件 非常不错的asp.net上传控件 非常不错的asp.net上传控件 非常不错的asp.net上传控件 非常不错的asp.net上传控件
ASp.net上传控件源代码
C# asp.net上传文件的代码 ,使用上传控件的后台代码
.NET社区

62,244

社区成员

668,998

社区内容

发帖
与我相关
我的任务
社区描述
.NET技术交流专区
javascript云原生 企业社区
社区管理员
  • ASP.NET
  • .Net开发者社区
  • R小R
加入社区
  • 近7日
  • 近30日
  • 至今

加载中

查看更多榜单
社区公告

.NET 社区是一个围绕开源 .NET 的开放、热情、创新、包容的技术社区。社区致力于为广大 .NET 爱好者提供一个良好的知识共享、协同互助的 .NET 技术交流环境。我们尊重不同意见，支持健康理性的辩论和互动，反对歧视和攻击。

希望和大家一起共同营造一个活跃、友好的社区氛围。

试试用AI创作助手写篇文章吧

+ 用AI写文章