ASP. Net file Operation Small example (create folder, read, write, delete)

Static build to create a folder in the virtual directory to save the generated page then you need to manipulate the file. Create folder using System.IO;        String name = "AA";        String path = Server.MapPath ("") + "\ \" + Name; if (directory.exists (path)) {Response.Write (' <script>alert (' folder already exists! ');        History.go ( -1);</script> ");        } else {DirectoryInfo folder=directory.createdirectory (path);        String time = convert.tostring (directory.getcreationtime (path)); String foldername = name. Substring (name.        LastIndexOf ("\ \") + 1);        Response.Write ("Add success!");        Response.Write ("Add Time:" +time);        Response.Write ("folder name:" +foldername);        } Two, delete folder using System.IO;        String name = "AA";        String path = Server.MapPath ("") + "\ \" + Name;            if (directory.exists (path)) {directory.delete (path);        Response.Write ("Delete succeeded!"); } else {Response.Write (' <script>alert (' folder does not exist! ');        History.go ( -1);</script> "); } third, move the folderMoving string name1 = "AA";         String name2 = "Bb\\aa";        Move to the folder, move AA to bb string path1 = Server.MapPath ("") + "\ \" + name1;        String path2 = Server.MapPath ("") + "\ \" + name2; if (! Directory.Exists (path1)) {Response.Write (' <script>alert (' folder ' +name1+ ' does not exist! ');            History.go ( -1);</script> ");        Return } if (Directory.Exists (path2)) {Response.Write ("<script>alert" (' folder ' + name2 + ' already exists! ');            History.go ( -1);</script> ");        Return            } try {directory.move (path1, path2);        Response.Write ("folder moved successfully!"); } catch {Response.Write (' <script>alert (' must operate in the same directory! ');        History.go ( -1);</script> "); Get a list of files under folder foreground <asp:listbox id= "list" runat= "Server" width= "200px" height= "300px" visible= "false" ></asp:        listbox> background String name = "AA"; String path = Server.MapPath ("") + "\ \" + Name; if (! Directory.Exists (path)) {list.            Visible = false; Response.Write ("<script>alert" (' folder ' + ' name + ' does not exist! ');            History.go ( -1);</script> ");        Return            } else {DirectoryInfo foldinfo = new DirectoryInfo (path); filesysteminfo[] dirs = Foldinfo.            Getfilesysteminfos (); if (dirs. Length < 1) {Response.Write ("<script>alert (' No data in folder! ');                History.go ( -1);</script> ");            Return } list.            Visible = true; List.            DataSource = dirs; List.        DataBind ();        } v. Create a file String name = "Aa.aspx";        String path = Server.MapPath ("") + "\ \" + Name; if (file.exists (path)) {Response.Write ("<script>alert" (' file ' + name + ' already exists! ');            History.go ( -1);</script> ");        Return                  } else {FileStream fs = file.create (path);   Fs.            Close ();        Response.Write ("file" + name + "Add success!");        VI. copy file string name1 = "aa\\1.html";        String name2 = "bb\\1.html";        String path1 = Server.MapPath ("") + "\ \" + name1;        String path2 = Server.MapPath ("") + "\ \" + name2; if (! File.exists (path1)) {Response.Write ("<script>alert" ("file" + name1 + "does not exist!");            History.go ( -1);</script> ");        Return } if (File.exists (path2)) {Response.Write ("<script>alert" (' file ' + name2 + ' already exists! ');            History.go ( -1);</script> ");        Return            } try {file.copy (path1, path2);        Response.Write ("Copy succeeded!");        } catch {Response.Write ("Copy failed!");        Move file String name1 = "aa\\1.html";        String name2 = "bb\\1.html";        String path1 = Server.MapPath ("") + "\ \" + name1;        String path2 = Server.MapPath ("") + "\ \" + name2; if (! File.exists (path1))        {Response.Write ("<script>alert" (' file ' + name1 + ' does not exist! ');            History.go ( -1);</script> ");        Return } if (File.exists (path2)) {Response.Write ("<script>alert" (' file ' + name2 + ' already exists! ');            History.go ( -1);</script> ");        Return            } try {file.move (path1, path2);        Response.Write ("Mobile success!");        } catch {Response.Write ("Move failed!");      } viii. File Delete string name = "Bb\\1.html";             String path = Server.MapPath ("") + "\ \" + Name; if (! File.exists (Path)) {Response.Write (' <script>alert (' file ' + ' name + ' does not exist! ');            History.go ( -1);</script> ");        Return            } try {file.delete (path);        Response.Write ("Delete succeeded!");        } catch {Response.Write ("Delete failed!");      } Nine, get the details of the file string name = "Aa\\11.txt"; String path = Server.MapPath ("") + "\ \" + NAme if (! File.exists (Path)) {Response.Write (' <script>alert (' file ' + ' name + ' does not exist! ');          History.go ( -1);</script> ");      Return          } else {FileInfo file = new FileInfo (path);          String filexinxi1, Filexinxi2, Filexinxi3, Filexinxi4, filexinxi5; File path filexinxi1 = files.          FullName; File size, byte Filexinxi2 = files.          length+ "bytes"; File properties Filexinxi3 = files.          Attributes.tostring (); File creation Time Filexinxi4 = files.          Creationtime.toshortdatestring (); Last access Time Filexinxi5 = file.          Lastaccesstime.toshortdatestring ();          Response.Write ("File path:" +filexinxi1+ "<br>");          Response.Write ("File size:" + filexinxi2 + "<br>");          Response.Write ("File attributes:" + filexinxi3 + "<br>");          Response.Write ("File creation time:" + filexinxi4 + "<br>");      Response.Write ("File Last access time:" + filexinxi5 + "<br>"); } Ten, read the file contents string name = "Aa\\11.html";      String path = Server.MapPath ("") + "\ \" + Name;      FileInfo fi = new FileInfo (path); Gets the file name string filename = fi.        Name; Gets the file name extension string extension = fi.        Extension; Determine if the file is in the TXT format if (extension! = ". html") {Response.Write ("<script>alert (' Please select HTML format file! ');          History.go ( -1);</script> ");      Return      } StreamReader sr = new StreamReader (path, System.Text.Encoding.Default);      Response.Write ("The contents of the document are as follows:<br>"); Response.Write (Sr.      ReadToEnd ()); Sr.        Close (); Xi. write to file string name = "Aa\\11.html";      String content1= "