ASP.NET大文件断点上传
来源：互联网 发布：中国功夫 知乎 编辑：程序博客网 时间：2024/05/28 23:08
前端代码
<!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 id="Head1" runat="server"> <title></title> <script language="javascript"> //全选 function CheckAll(e, itemname) { var aa = document.getElementsByName(itemname); if (aa == undefined) return; for (var i = 0; i < aa.length; i++) aa[i].checked = e.checked; } </script> <script language="javascript"> //判断复选框是否选中 function delss() { var checkArray = document.getElementsByName("Item"); var checkNum = 0; for (var i = 0; i < checkArray.length; i++) { if (checkArray[i].checked) { checkNum++; } } if (checkNum == 0) { alert('对不起,您还没有选择!'); return false; } else { if (confirm("您确定要删除吗？")) { return true; } else { return false; } } } </script></head><body> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> <asp:Timer ID="Timer1" runat="server" Interval="1000" OnTick="Timer1_Tick"> </asp:Timer> <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Always"> <ContentTemplate> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </ContentTemplate> <Triggers> <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="tick" /> </Triggers> </asp:UpdatePanel> <asp:FileUpload ID="FileUpload1" runat="server" /> <asp:Button ID="Button1" runat="server" Text="上传文件" OnClick="Button1_Click" /> <table width="100%" border="0" cellpadding="0" cellspacing="1" bgcolor="#cccccc"> <tr class="spgl_bg"> <td width="6%" height="22" align="center" valign="middle" bgcolor="#FFFFFF"> <input name="chkall" value="1" type="checkbox" onclick="CheckAll(this,'Item')" class="qx" />全选 </td> <td width="6%" height="22" align="center" valign="middle" bgcolor="#FFFFFF"> 编号 </td> <td width="16%" height="22" align="center" valign="middle" bgcolor="#FFFFFF"> 名称 </td> <td width="52%" height="22" align="center" valign="middle" bgcolor="#FFFFFF"> 上传文件地址 </td> <td width="8%" height="22" align="center" valign="middle" bgcolor="#FFFFFF"> 已上传 </td> <td width="12%" height="22" align="center" valign="middle" bgcolor="#FFFFFF"> 操作 </td> </tr> <asp:Repeater ID="rptList" runat="server"> <ItemTemplate> <tr> <td align="center" valign="middle" bgcolor="<%#(Container.ItemIndex%2==0)?"#FFFFFF":"#f2f2f2"%>"> <input name="Item" type="checkbox" value='<%# Eval("fid")%>' /> </td> <td align="center" valign="middle" bgcolor="<%#(Container.ItemIndex%2==0)?"#FFFFFF":"#f2f2f2"%>"> <%# Container.ItemIndex + 1 %> </td> <td align="center" valign="middle" bgcolor="<%#(Container.ItemIndex%2==0)?"#FFFFFF":"#f2f2f2"%>" class="gml"> <%# Eval("FileNameLocal")%> </td> <td align="center" valign="middle" bgcolor="<%#(Container.ItemIndex%2==0)?"#FFFFFF":"#f2f2f2"%>" class="gml"> <%# Eval("FilePathLocal")%> </td> <td align="center" valign="middle" bgcolor="<%#(Container.ItemIndex%2==0)?"#FFFFFF":"#f2f2f2"%>" class="gml"> <%# Eval("PostedPercent")%> </td> <td align="center" valign="middle" bgcolor="<%#(Container.ItemIndex%2==0)?"#FFFFFF":"#f2f2f2"%>"> <asp:LinkButton ID="lbTop" runat="server" Text='续传' CommandArgument='<%# Eval("fid") %>' OnCommand="lbTop_Click"></asp:LinkButton>| <asp:LinkButton ID="lbClose" Visible="false" runat="server" Text='停止' CommandArgument='<%# Eval("fid") %>' OnCommand="lbClose_Click"></asp:LinkButton> <asp:LinkButton ID="lbDel" runat="server" Text="删除" OnCommand="lbDel_Click" CommandArgument='<%# Eval("fid") %>' OnClientClick="javascript:return confirm('您确定要删除吗？');"></asp:LinkButton> </td> <asp:HiddenField ID="hidOK" runat="server" Value='<%# Eval("Isok") %>' /> </tr> </ItemTemplate> </asp:Repeater> </table> <asp:Button ID="btnAllDelete" runat="server" Text="批量删除" class="plsc" CommandName="delete" OnClientClick="return delss()" OnCommand="btnAllDelete_Command" /> </form></body></html>后端代码
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using Web.demoSql.db;using System.IO;using System.Text;using System.Security.Cryptography;using System.Threading;namespace Web{ public partial class Index : System.Web.UI.Page { #region public long m_FileSize;//文件总大小。 long m_RangePos; //文件块起始位置 public long RangePos { set { this.m_RangePos = value; } } //文件读写锁，防止多个用户同时上传相同文件时，出现创建文件的错误 static ReaderWriterLock m_writeLock = new ReaderWriterLock(); #endregion protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { GetList(); } } /// <summary> /// 上传事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void Button1_Click(object sender, EventArgs e) { #region 获取上传文件的信息 string md5Fisrt = GenerateCheckCode10(); string uidFisrt = "0"; string fileLengthFisrt = FileUpload1.PostedFile.ContentLength.ToString(); string fileSizeFisrt = Math.Round(Convert.ToDouble(FileUpload1.PostedFile.ContentLength) / Convert.ToDouble(1024 * 1024), 2).ToString() + "MB"; string pathLocalFisrt = FileUpload1.PostedFile.FileName; #endregion string FileType = FileUpload1.FileName.Substring(FileUpload1.FileName.LastIndexOf(".") + 1); if (FileUpload1.FileName == "" || Request.Files.Count < 0) { string msg = "请选择文件！"; Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('" + msg + "');</script>"); } else if (FileType.ToLower() != "rar") { string msg = "文件格式不正确！"; Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('" + msg + "');</script>"); } else { #region 向数据库插入上传文件信息 HttpUploaderDB db = new HttpUploaderDB(); xdb_files inf = new xdb_files(); inf.FileNameLocal = Path.GetFileName(pathLocalFisrt); inf.FilePathLocal = pathLocalFisrt; inf.FileNameRemote = md5Fisrt + Path.GetExtension(pathLocalFisrt).ToLower(); //数据库存在相同文件 if (db.GetFileInfByMd5(md5Fisrt, ref inf)) { inf.FileNameLocal = Path.GetFileName(pathLocalFisrt); inf.FilePathLocal = pathLocalFisrt; inf.uid = int.Parse(uidFisrt);//将当前文件UID设置为当前用户UID inf.IsDeleted = false; inf.fid = db.Add(ref inf); }//数据库不存在相同文件 else { HttpUploaderCfg cfg = new HttpUploaderCfg(); cfg.CreateUploadPath(); inf.uid = int.Parse(uidFisrt);//将当前文件UID设置为当前用户UID inf.FileSize = fileSizeFisrt; inf.FileMD5 = md5Fisrt; inf.FileLength = Convert.ToInt32(fileLengthFisrt); inf.FilePathRemote = Path.Combine(cfg.GetUploadPath(), inf.FileNameRemote); inf.FilePathRelative = Path.Combine(cfg.GetRelatPath(), inf.FileNameRemote); inf.fid = db.Add(ref inf); GetList(); } #endregion #region 更新上传进度 int num = 0; string struid = uidFisrt; string strfid = inf.fid.ToString(); string strFileSize = fileLengthFisrt; string strRangePos = num.ToString(); if (strFileSize.Length > 0 && struid.Length > 0 && strfid.Length > 0 && md5Fisrt.Length > 0 && strRangePos.Length > 0 && Request.Files.Count > 0) { long fileSize = Convert.ToInt64(strFileSize); long rangePos = Convert.ToInt64(strRangePos); int uid = Convert.ToInt32(struid); int fid = Convert.ToInt32(strfid); //临时文件大小 HttpPostedFile file = Request.Files.Get(0); long rangeSize = 131072; long rangeSiHH = 131072; xdb_files infModel = new xdb_files(); for (long i = 0; i <= Convert.ToInt32(file.InputStream.Length); ) { if (db.GetFileInfByFid(fid, ref infModel)) { //已上传大小 = 文件块索引 + 临时文件块大小 //long postedLength = rangePos + rangeSize; long postedLength = i + rangeSize; long nownum = i; if (file.InputStream.Length < postedLength) { postedLength = file.InputStream.Length - nownum; rangeSiHH = file.InputStream.Length - nownum; } //上传百分比 = 已上传大小 / 文件总大小 double per = ((double)postedLength / (double)fileSize) * 100; decimal perd = Math.Round((decimal)per, 2); string postedPercent = perd.ToString() + "%"; //保存文件块数据 FileResumer res = new FileResumer(); res.m_FileSize = fileSize;//根据客户端文件大小在服务端创建文件 res.RangePos = rangePos; #region m_writeLock.AcquireWriterLock(1000); //文件不存在则创建 if (!File.Exists(infModel.FilePathRemote)) { FileStream fs = File.OpenWrite(infModel.FilePathRemote); BinaryWriter w = new BinaryWriter(fs); for (long ii = 0; ii < infModel.FileLength; ++ii) { w.Write((byte)0); } w.Close(); fs.Close(); } m_writeLock.ReleaseWriterLock(); //上传的文件大小不为空 if (rangeSiHH > 0) { //文件已存在，写入数据 //可能会有多个线程同时写文件。 FileStream fs = new FileStream(infModel.FilePathRemote, FileMode.Open, FileAccess.Write, FileShare.Write); fs.Seek(i, SeekOrigin.Begin); byte[] ByteArray = new byte[rangeSiHH]; file.InputStream.Read(ByteArray, 0, (int)rangeSiHH); fs.Write(ByteArray, 0, (int)rangeSiHH); fs.Flush(); fs.Close(); } #endregion //更新文件进度 db.UpdateProgress(uid, fid, rangePos, postedLength, postedPercent); i += rangeSize; } } } #endregion #region 上传完成 db.UploadComplete(md5Fisrt); #endregion GetList(); } } /// <summary> /// 续传 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void lbTop_Click(object sender, CommandEventArgs e) { int id = Convert.ToInt32(e.CommandArgument); HttpUploaderDB db = new HttpUploaderDB(); #region 设置按钮状态 foreach (RepeaterItem grv in rptList.Items) { LinkButton lb1 = (LinkButton)rptList.Items[grv.ItemIndex].FindControl("lbTop");//续传 LinkButton lb2 = (LinkButton)rptList.Items[grv.ItemIndex].FindControl("lbClose");//停止 lb1.Enabled = false; lb2.Enabled = false; } LinkButton t = (LinkButton)sender; RepeaterItem ri = (RepeaterItem)t.NamingContainer; LinkButton itemid = ((LinkButton)ri.FindControl("lbClose")); itemid.Enabled = true; #endregion #region 获取上传文件的信息 string md5Fisrt = GenerateCheckCode10(); string uidFisrt = "0"; string fileLengthFisrt = FileUpload1.PostedFile.ContentLength.ToString(); string fileSizeFisrt = Math.Round(Convert.ToDouble(FileUpload1.PostedFile.ContentLength) / Convert.ToDouble(1024 * 1024), 2).ToString() + "MB"; string pathLocalFisrt = FileUpload1.PostedFile.FileName; xdb_files model = db.GetModelByID(id); md5Fisrt = model.FileMD5; string FileType = FileUpload1.FileName.Substring(FileUpload1.FileName.LastIndexOf(".") + 1); if (FileUpload1.FileName == "" || Request.Files.Count < 0) { string msg = "请选择文件！"; Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('" + msg + "');</script>"); } else if (pathLocalFisrt != model.FilePathLocal || fileLengthFisrt != Convert.ToString(model.FileLength)) { string msg = "第一次上传文件与本次上传文件不符合！"; Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('" + msg + "');</script>"); } else if (FileType.ToLower() != "rar") { string msg = "文件格式不正确！"; Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('" + msg + "');</script>"); } else { #region 更新上传进度 int num = 0; string struid = uidFisrt; string strfid = id.ToString(); string strFileSize = fileLengthFisrt; string strRangePos = num.ToString(); if (strFileSize.Length > 0 && struid.Length > 0 && strfid.Length > 0 && md5Fisrt.Length > 0 && strRangePos.Length > 0 && Request.Files.Count > 0) { long fileSize = Convert.ToInt64(strFileSize); long rangePos = Convert.ToInt64(strRangePos); int uid = Convert.ToInt32(struid); int fid = Convert.ToInt32(strfid); //临时文件大小 HttpPostedFile file = Request.Files.Get(0); long rangeSize = 131072; long rangeSiHH = 131072; xdb_files infModel = new xdb_files(); for (long i = model.FilePos; i <= Convert.ToInt32(file.InputStream.Length); ) { if (db.GetFileInfByFid(fid, ref infModel)) { //已上传大小 = 文件块索引 + 临时文件块大小 //long postedLength = rangePos + rangeSize; long postedLength = i + rangeSize; long nownum = i; if (file.InputStream.Length < postedLength) { postedLength = file.InputStream.Length - nownum; rangeSiHH = file.InputStream.Length - nownum; } //上传百分比 = 已上传大小 / 文件总大小 double per = ((double)postedLength / (double)fileSize) * 100; decimal perd = Math.Round((decimal)per, 2); string postedPercent = perd.ToString() + "%"; //保存文件块数据 FileResumer res = new FileResumer(); res.m_FileSize = fileSize;//根据客户端文件大小在服务端创建文件 res.RangePos = rangePos; #region m_writeLock.AcquireWriterLock(1000); //文件不存在则创建 if (!File.Exists(infModel.FilePathRemote)) { FileStream fs = File.OpenWrite(infModel.FilePathRemote); BinaryWriter w = new BinaryWriter(fs); for (long ii = 0; ii < infModel.FileLength; ++ii) { w.Write((byte)0); } w.Close(); fs.Close(); } m_writeLock.ReleaseWriterLock(); //上传的文件大小不为空 if (rangeSiHH > 0) { //文件已存在，写入数据 //可能会有多个线程同时写文件。 FileStream fs = new FileStream(infModel.FilePathRemote, FileMode.Open, FileAccess.Write, FileShare.Write); fs.Seek(i, SeekOrigin.Begin); byte[] ByteArray = new byte[rangeSiHH]; file.InputStream.Read(ByteArray, 0, (int)rangeSiHH); fs.Write(ByteArray, 0, (int)rangeSiHH); fs.Flush(); fs.Close(); } #endregion //更新文件进度 db.UpdateProgress(uid, fid, rangePos, postedLength, postedPercent); i += rangeSize; } } } #endregion #region 上传完成 db.UploadComplete(md5Fisrt); #endregion GetList(); } #endregion EnabledStop(); } /// <summary> /// 停止 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void lbClose_Click(object sender, CommandEventArgs e) { EnabledStop(); } /// <summary> /// 删除 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void lbDel_Click(object sender, CommandEventArgs e) { int id = Convert.ToInt32(e.CommandArgument); HttpUploaderDB db = new HttpUploaderDB(); db.Del(id); GetList(); } /// <summary> /// 批量删除事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnAllDelete_Command(object sender, CommandEventArgs e) { HttpUploaderDB db = new HttpUploaderDB(); string ids = Request.Form["Item"]; switch (e.CommandName) { case "delete": BakDelete(ids); break; } GetList(); } /// <summary> /// 批量删除方法 /// </summary> /// <param name="ids"></param> private void BakDelete(string ids) { HttpUploaderDB db = new HttpUploaderDB(); string strapp = ids; string[] strtemp = strapp.Split(','); foreach (string strs in strtemp) { db.Del(Convert.ToInt32(strs.ToString())); } } /// <summary> /// 获取数据列表 /// </summary> public void GetList() { HttpUploaderDB db = new HttpUploaderDB(); rptList.DataSource = db.GetList(); rptList.DataBind(); EnabledStop(); } /// <summary> /// 禁用所有停止控件，启用所有续传控件 /// </summary> public void EnabledStop() { foreach (RepeaterItem grv in rptList.Items) { LinkButton lb1 = (LinkButton)rptList.Items[grv.ItemIndex].FindControl("lbTop");//续传 LinkButton lb2 = (LinkButton)rptList.Items[grv.ItemIndex].FindControl("lbClose");//停止 HiddenField hidk = (HiddenField)rptList.Items[grv.ItemIndex].FindControl("hidOK");//上传是否完成 if (hidk.Value.ToLower() == "true") { lb1.Enabled = false; lb2.Enabled = false; } else { lb1.Enabled = true; lb2.Enabled = false; } } } /// <summary> /// 刷新时间 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void Timer1_Tick(object sender, EventArgs e) { Label1.Text = DateTime.Now.ToString(); //GetList(); } private string GenerateCheckCode10() { int number; char code; string checkCode = String.Empty; System.Random random = new Random(); for (int i = 0; i < 10; i++) { number = random.Next(); if (number % 2 == 0) code = (char)('0' + (char)(number % 10)); else code = (char)('A' + (char)(number % 26)); checkCode += code.ToString(); } return checkCode; } }}- ASP.NET大文件断点上传
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