Asp. NET implementation of simple File upload class

This article mainly introduces the ASP.net implementation of the simple file upload class, this article gives the implementation code and use method examples, the need for friends can refer to the

Call Method:

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uploadfile uf = new UploadFile ()  /* Optional Parameters/UF. Setisuseoldfilename (TRUE);//Whether to use the original file name as the file name for the new file (default: TRUE), True the original filename, false the system generates a new filename uf. Setfiledirectory (Server.MapPath ("/file/temp3/"));//File Save path (default:/upload) uf. Setfiletype ("*");//Allow uploaded file type, comma split, must all lowercase! * Represents all (default:. pdf,.xls,.xlsx,.doc,.docx,.txt,.png,.jpg,.gif) uf. Setisrenamesamefile (false);//rename file with same name?    //files save var message = UF with a time catalog. Save (request.files["Fileupload1"]); "/file/temp3/2015/4/xx.jpg"  //files are stored in numbered directories with var message2 = uf. Save (request.files["Fileupload1"], "001"/* number */); "/file/temp3/001/xx.jpg"    //return information var isError = message. Whether the error;//to upload success var webpath = message. webfilepath;//returns the Web path var msg = message. message;//returns the upload information var filePath = message. filepath;//back to file path var issuccess = message. Error = = false;

Code:

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Using System; Using System.Collections.Generic; Using System.IO; Using System.Linq; Using System.Security.Cryptography; Using System.Text.RegularExpressions; Using System.Web; Using System.Web.Hosting;     namespace Syntacticsugar {///<summary>///* * Description: Single File Upload class (temporarily does not support multiple file uploads)///* * Founder Time: 2015-5-27///* * Modified Time:-///* * Author: Sunkaixuan///</summary> public class UploadFile {  private paramsmodel Params; public UPLOADF Ile () {Params = new Paramsmodel () {filedirectory = "/upload", FileType = ". Pdf,.xls,.xlsx,.doc,.docx,.txt,.png,.jpg,.gif ", Maxsizem = ten, Pathsavetype = Pathsavetype.datetimenow, isrenamesamefile=true};}  ///<summary>///File Save path (default:/upload)///</summary> public void setfiledirectory (string filedirectory {if (filedirectory = = null) {throw new ArgumentNullException ("FileDirectory");}   var ismappath = Regex.IsMatch ( FileDirectory, @ "[A-Z]:", regexoptions.ignorecase); if (ismappath) {filedirectory = Getrelativepath (fiLedirectory); } params.filedirectory = FileDirectory; }    ///<summary>///whether to use the original file name as the file name for the new file (default: TRUE)///</summary>///<param name= "Isuseoldfile Name ' >true original filename, false system generates new file name </param> public void Setisuseoldfilename (bool isuseoldfilename) { Params.isuseoldfilename = Isuseoldfilename; }  ///<summary>///allow file types to be uploaded, comma split, must all lowercase! * Represents all (default:. pdf,.xls,.xlsx,.doc,.docx,.txt,.png,.jpg,.gif)///</summary> public void Setfiletype (string FileType) {params.filetype = FileType}///<summary>///How many sizes are allowed to upload (unit: M)///</summary> public void Setmaxsi Zem (double maxsizem) {Params.maxsizem = Maxsizem}///<summary>///rename file with same name? </summary>///<param name= "Isrenamesamefile" >true: renaming, false overwrite </param> public void Setisrenamesamefile (bool isrenamesamefile) {params.isrenamesamefile = Isrenamesamefile;}    ///<summary >///Save the form file///</summary>///<param name= "Postfile" >httppostedfile</param>///<returns></returns> public responsemessage Save (Httppostedfile postfile) { Return Commonsave (Postfile);      ///<summary>///Save form files, create subfolders by number///</summary>///<param name= "Postfile" >htt ppostedfile</param>///<param name= "number" > Code </param>///<returns></returns> Public Responsemessage Save (Httppostedfile postfile, string number) {  Params.pathsavetype = pathsavetype.code; _number = n umber; Return Commonsave (Postfile); }    ///<summary>///Save the form file, according to Httppostedfile///</summary>///<param name= "Postfile" >htt ppostedfile</param>///<param name= "Isrenamesamefile" > Value to True with the same name file for renaming, false overwrite existing file </param>/// <param name= "filename" > New filename </param>///<returns></returns> Private Responsemessage Commonsave (Httppostedfile postfile) {  Responsemessage Reval = new Responsemessage (); try {if (Postfile = =null | | Postfile.contentlength = = 0) {tryerror (Reval, "no file!") "); return Reval; }  //filename string filename = params.isuseoldfilename? PostFile.FileName:DateTime.Now.ToString ("yyyymmddhhmmssms") + path.getextension (postfile.filename);  //validation format this. Checkingtype (Reval, postfile.filename); Verify size this. Checksize (Reval, postfile);   if (Reval. Error) return Reval;     String webdir = string. Empty; Get storage directory var directory = this. Getdirectory (ref WebDir); var filePath = directory + fileName; if (System.IO.File.Exists (FilePath)) {if (params.isrenamesamefile) {filePath = directory + DateTime.Now.ToString (" Yyyymmddhhssms ") +"-"+ fileName; else {System.IO.File.Delete (FilePath);}} Save File Postfile.saveas (FilePath); Reval. FilePath = FilePath; Reval. FilePath = WebDir + fileName; Reval. filename = filename; Reval. Webfilepath = WebDir + fileName; return Reval; The catch (Exception ex) {tryerror (Reval, ex). message); return Reval; }   private void Checksize (ResponseMessage message, Httppostedfile postfile) {if (postfile.contentlength/1024.0/1024.0 > Params.maxsizem) {tryerror ( Message, String. Format ("Sorry to upload the file too large, not more than {0}m! ", Params.maxsizem));} <summary>///obtain relative paths according to physical path///</summary>///<param name= "FileDirectory" ></param>///< param name= "Sever" ></param>///<returns></returns> private static string Getrelativepath (string FileDirectory) {var sever = HttpContext.Current.Server; filedirectory = "/" + filedirectory.replace (sever. MapPath ("~/"), "" ". TrimStart ('/'). Replace (', '/'); return filedirectory; }  ///<summary>///get directory///</summary>///<returns></returns> private String getdirectory (Ref string WebDir) {var sever = HttpContext.Current.Server;//storage directory string directory = Params.filedirectory;  /directory format string Childdire Ctory = DateTime.Now.ToString ("Yyyy-mm/dd"); if (Params.pathsavetype = = Pathsavetype.code) {childdirectory = _number;} webdir = Directory. TrimEnd ('/') + "/" + childdirectory + '/'; String dir = Sever. MapPath (WebDir); Create the directory if (directory.exists (dir) = False) Directory.CreateDirectory (dir); return dir; }  ///<summary>///validation file type)///</summary>///<param name= "fileName" ></param> private void Checkingtype (Responsemessage message, string fileName) {if (Params.filetype!= "*") {//Get Allow upload Type list string[] Typelist = Params.FileType.Split (', ');  //Get upload file type (lowercase) String type = Path.getextension (fileName). Tolowerinvariant ();;  //authentication type if (Typelist.contains (type) = = False) this. Tryerror (Message, "File type illegal!"); }  ///<summary>///throw error///</summary>///<param name= "MSG" ></param> private void Tryer ROR (Responsemessage message, string msg) {message. Error = true; Message. message = MSG; }   #region models   Private class Paramsmodel {///<summary>///file save path///</summary> public stri ng FileDirectory {get; set;}///<Summary>///allows uploading of file types, comma split, must all lowercase! </summary> public string FileType {get; set;}///<summary>///How many sizes are allowed to upload///</summary> public dou ble maxsizem {get; set;}///<summary>///path Storage type///</summary> public pathsavetype pathsavetype {get; set ; ///<summary>///Rename a file with the same name? </summary> public bool Isrenamesamefile {get; set;}///<summary>///whether to use the original filename///</summary> pub LIC bool Isuseoldfilename {get; set;}}    ///<summary>///path Storage type///</summary> public enum Pathsavetype {///<summary>///based on time creation Build Storage directory///</summary> datetimenow = 0,///<summary>///Create storage directory based on ID number///</summary> code = 1  } private string _number {get; set;}  ///<summary>///back to information///</summary> public class Responsemessag e {///<summary>///upload error///</summary> public bool Error {get; set;}///<summary>///message///</ Summary> public String Message {get; set;}///<summary>///file path///</summary> public string FilePath {get; set;}///<summar Y>///Web site path///</summary> public string Webfilepath {get; set;}///<summary>///getting file name///</summary > public string FileName {get; set;}  } #endregion}}