C # upload a file and delete the extracted directory of the old file notepad

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)// Upload a new book

{

B. _ upfile =Uploadfile(Fi_fp );

If (istxt = true)

{B. _ txtlist =Readtxtmm(B. _ upfile);} // re-extract the Directory

}

Public StringUploadfilE(HtmlinputfileFile1)

{

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. deleetpipeline ["bookfile"]. tostring (). Trim ();

File1.postedfile. saveas (httpcontext. Current. server. mappath (picpath) + filenamec );

Deleteoldfile(Server. mappath ("../bookfile/") + session ["upfile"]);// Delete the old file

Return filenamec;

}

Else

{

The return format is incorrect! ";

}

}

Else

{

Return "";

}

}

Public voidDeleteoldfile(String oldfile)

{

// Determine whether a file exists

If (file. exists (@ "" + oldfile + ""))

{

// Delete if any

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

}

}

Public boolSet(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;

}

// Extract the chapter name and start row number and end row number

Public StringReadtxtmm(String URL)// Url txt file path

{

String Path = server. mappath ("../bookfile/") + URL;

String STR = "chapter *"; // search for the keyword * in the Section as a variable

String WZ = ""; // list of chapters and line numbers

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 (); // the end line number of the previous chapter. the start line number chapter name of this chapter.

}

Else

{WZ + = "0," + stringlines [I]. tostring ();}

}

}

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

Return WZ;

}

// No one reads the Directory and outputs it

// Read chapter content

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> ";

}

}

}

// Read the next page of the previous page

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 = "Previous Page: <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 = "next page: <a href = \" workerstudyview. aspx? Blid = "+ blid +" & START = "+ arrlist [0]. tostring () + "& End =" + arrlist [2]. tostring () + "\"> "+ arrlist [1]. tostring (). trim () + "</a> <br/> ";

}

Break;

}

}

}

This article from the "technical life" blog, please be sure to keep this source http://zhaoyingyatou.blog.51cto.com/7151735/1433067