html: <input id="Fi_Fp" runat="server" name="Fi_Fp"type="file" />

.cs:

using System.IO;

using System.Text.RegularExpressions;

using System.Windows.Forms;

if (Fi_Fp.PostedFile.ContentLength > 0)//上传了新图书

{

b._upfile = uploadFile(Fi_Fp);

if (isTxt == true)

{ b._txtlist = readtxtmm(b._upfile); }//重新提取目录

}

public string uploadFile(HtmlInputFile File1)

{

Comm nadd = new Comm();

if (File1.PostedFile.ContentLength > 0)

{

string filenamec = null;

string fn = File1.PostedFile.FileName;

filenamec = "File_" + nadd.getRandomFilename();

filenamec += fn.Substring(fn.LastIndexOf("."));

string ext = fn.Substring(fn.LastIndexOf(".") + 1).ToLower();

if (ext == "txt") { isTxt = true; }

if (SET(ext))

{

string Picpath = System.Configuration.ConfigurationManager.AppSettings["bookfile"].ToString().Trim();

File1.PostedFile.SaveAs(HttpContext.Current.Server.MapPath(Picpath) + filenamec);

deleteoldfile(Server.MapPath("../bookfile/") + Session["upfile"]);//删除旧文件

return filenamec;

}

else

{

return "格式不正确!";

}

}

else

{

return "";

}

}

public void deleteoldfile(string oldfile)

{

//判断文件是不是存在

if (File.Exists(@""+oldfile+""))

{

//如果存在则删除

File.Delete(@"" + oldfile + "");

}

}

public bool SET(string extion)

{

string[] extAry =

{"txt","doc","ppt","jpg","pdf","bmp","docx"

};

for (int i = 0; i < extAry.Length; i++)

{

if (extAry[i] == extion)

{

return true;

}

}

return false;

}

//提取章节名及开始行号结束行号

public string readtxtmm(string url)//url txt文件路径

{

string path = Server.MapPath("../bookfile/") + url;

string str = "第(?<value>[\\w]*?)章";//查找章节关键字 *号为变量

string wz = ""; //章节及行号列表

string[] stringlines = File.ReadAllLines(path, System.Text.Encoding.Default);

Regex reg = new Regex(str);

for (int i = 0; i < stringlines.Length; i++)

{

Match mat = reg.Match(stringlines[i].ToString());

if (mat.Success)

{

if (i != 0)

{

wz += "," + (i - 1) + "|" + i + "," + stringlines[i].ToString();//上一章结尾行号，本章开始行号 章节名

}

else

{ wz += "0," + stringlines[i].ToString(); }

}

}

wz += "," + stringlines.Length + "|";

return wz;

}

//读取目录没人并输出

//读取章节内容

string path = Server.MapPath("bookfile/") + url;

string[] stringlines = File.ReadAllLines(path, System.Text.Encoding.Default);

booktitle = stringlines[start].ToString();

for (int i = start+1; i <= end; i++)

{

if (i < stringlines.Length)

{

if ( stringlines[i].ToString().Trim().Length>0)

{

bookscontent.Text += "<p>" + stringlines[i].ToString() + "</p>";

}

}

}

//读取上一页下一页

string[] list = txtlist.Split('|');

for (int i = 0; i < list.Length; i++)

{

if (list[i].ToString().Trim() != "")

{

string[] dang = list[i].Split(',');

if (int.Parse(dang[0].ToString()) == start)

{

if (i - 1 >= 0)

{

string[] arrlist = list[i - 1].Split(',');

uppage = "上一页：<a href=\"WorkerStudyView.aspx?BLid=" + blid + "&start=" + arrlist[0].ToString() + "&end=" + arrlist[2].ToString() + "\">" + arrlist[1].ToString().Trim() + "</a><br />";

}

if (i + 1 < list.Length-1)

{

string[] arrlist = list[i + 1].Split(',');

nextpage = "下一页：<a href=\"WorkerStudyView.aspx?BLid=" + blid + "&start=" + arrlist[0].ToString() + "&end=" + arrlist[2].ToString() + "\">" + arrlist[1].ToString().Trim() + "</a><br />";

}

break;

}

}

}