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;

        } 

       

    }

 

}
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yigeming 2008-06-27
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[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
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能支持Web上传多大的文件
david0620 2008-06-27
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支持大文件上傳不咯？例如1G的文件
stning 2008-06-27
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个人觉得20楼的比较好。
sxmonsy 2008-06-27
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楼主很强,帮你顶下.
s208ping 2008-06-27
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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
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有许多开源项目，有文件管理的
fellowcheng 2008-06-27
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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
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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
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饿。。。没准看 明白还不会做控件
industrial 2008-06-27
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楼上的这个控件是WroxUnited的吧:)
城市猎人0611 2008-06-27
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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
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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
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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
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[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
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有点晕~~
iuhxq 2008-06-27
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DateTime.Now.ToString("yyyyMMddHHmmss")


huming_h 2008-06-27
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看得出楼主比较喜欢星际争霸
huming_h 2008-06-27
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jf.
lzqlrr 2008-06-27
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