Simple and Easy-to-use File Upload class implemented by ASP. NET, asp.net File Upload

Simple and Easy-to-use File Upload class implemented by ASP. NET, asp.net File Upload

Call method:

UploadFile uf = new UploadFile ();/* optional parameter */uf. setIsUseOldFileName (true); // whether to use the original file name as the new file name (default: true), true original file name, false system generates new file name uf. setFileDirectory (Server. mapPath ("/file/temp3/"); // file storage path (default:/upload) uf. setFileType ("*"); // specifies the type of files that can be uploaded. Separate them with commas (,). All files must be in lower case! * Indicates all (default value: .20.,.xls,.xlsx,.doc,.docx,.txt,.png,.jpg,.gif) uf. SetIsRenameSameFile (false); // rename a file with the same name? // Save var message = uf in a time-based directory. save (Request. files ["Fileupload1"]); // "/file/temp3/2015/4/xx.jpg" // save var message2 = uf in the numbered directory. save (Request. files ["Fileupload1"], "001"/* No. */); // "/file/temp3/001/xx.jpg" // return information var isError = message. error; // determine whether the segment is uploaded successfully. var webPath = message. webFilePath; // return the web path var msg = message. message; // return the upload information var filePath = message. filePath; // reverse file path var isSuccess = message. error = false;

Code:

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 (Multi-File Upload is not supported currently) // ** Creation Time: /// ** modification time:-// *** Author: sunkaixuan // </summary> public class UploadFile {private ParamsModel Params; public Upl OadFile () {Params = new ParamsModel () {FileDirectory = "/upload", FileType = "Hangzhou", MaxSizeM = 10, PathSaveType = PathSaveType. dateTimeNow, IsRenameSameFile = true };}/// <summary> // file storage path (default:/upload) /// </summary> public void SetFileDirectory (string fileDirectory) {if (fileDirectory = null) {throw new ArgumentNullException ("fileDirectory");} va R 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 new file name (default: true) /// </summary> /// <param name = "isUseOldFileName"> true: original file name. false: The system generates a new file name. </param> public void SetIsUseOldFileName (bool isUseOldFileName) {Params. isUseOldFileName = IsUseOldFileName;} // <summary> // specifies the file type that can be uploaded. The file must be in lower case and separated by commas! * Indicates all (default value: .20.,.xls,.xlsx,.doc,.docx,.txt,.png,.jpg,.gif) /// </summary> public void SetFileType (string fileType) {Params. fileType = fileType;} // <summary> // The size (in MB) of the file to be uploaded. /// </summary> public void SetMaxSizeM (double maxSizeM) {Params. maxSizeM = maxSizeM;} // <summary> // rename a file of the same name? /// </Summary> /// <param name = "isRenameSameFile"> true: Rename, 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 the form File, create a subfolder // </summary> // <param name = "postFile"> HttpPostedFile </param> // <param name = "number"> NO. </param> /// <returns> </returns> public ResponseMessage Save (HttpPostedFile postFile, string number) {Params. pathSaveType = PathSaveType. code; _ Number = number; return CommonSave (postFile) ;}/// <summary> // Save the Form file, based on HttpPostedFile /// </summary> /// <param name = "postFile"> HttpPostedFile </p Aram> // <param name = "isRenameSameFile"> rename a file with the same name as true, false overwrites the original file </param> /// <param name = "fileName"> New file name </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;} // file name string fileName = Params. IsUseOldFileName? PostFile. fileName: DateTime. now. toString ("yyyyMMddhhmmssms") + Path. getExtension (postFile. fileName); // verify the format of this. checkingType (reval, postFile. fileName); // verify the size of this. checkSize (reval, postFile); if (reval. error) return reval; string webDir = string. empty; // obtain the storage directory var directory = this. getDirectory (ref webDir); var filePath = directory + fileName; if (System. IO. file. exists (filePath) {if (Params. I SRenameSameFile) {filePath = directory + DateTime. now. toString ("yyyyMMddhhssms") + "-" + fileName;} else {System. IO. file. delete (filePath) ;}// save the file postFile. saveAs (filePath); reval. filePath = filePath; reval. filePath = webDir + fileName; reval. fileName = fileName; reval. webFilePath = webDir + fileName; return reval;} catch (Exception ex) {TryError (reval, ex. message); return reval ;}} priv Ate void CheckSize (ResponseMessage message, HttpPostedFile PostFile) {if (PostFile. contentLength/1024.0/1024.0> Params. maxSizeM) {TryError (message, string. format ("sorry, the uploaded file is too large and cannot exceed {0} M! ", Params. maxSizeM ));}} /// <summary> /// obtain the relative path based on the 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> /// obtain the directory /// </summary> /// <returns> </returns> private string GetDirectory (ref string webDir) {var sever = HttpContext. current. server; // storage directory string directory = Params. fileDirectory; // directory Format string childDirectory = 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> // verify the file type) /// </summary> /// <param name = "fileName"> </param> private void CheckingType (ResponseMessage message, string fileName) {if (Params. fileType! = "*") {// Obtain the list of allowed upload types string [] typeList = Params. fileType. split (','); // obtain the upload file type (lower case) string type = Path. getExtension (fileName ). toLowerInvariant (); // verification type if (typeList. contains (type) = false) this. tryError (message, "the file type is invalid! ");}} /// <Summary> /// throw an error // </summary> /// <param name = "Msg"> </param> private void TryError (ResponseMessage message, string msg) {message. error = true; message. message = msg ;}# region models private class ParamsModel {// <summary> // file storage path /// </summary> public string FileDirectory {get; set ;} /// <summary> /// specifies the file type that can be uploaded. It must be separated by commas (,) and all must be in lower case! /// </Summary> public string FileType {get; set ;} /// <summary> /// the size of the file to be uploaded /// </summary> public double MaxSizeM {get; set ;} /// <summary> /// path storage type /// </summary> public PathSaveType {get; set ;} /// <summary> /// rename a file with the same name? /// </Summary> public bool IsRenameSameFile {get; set ;} /// <summary> /// whether to use the original file name /// </summary> public bool IsUseOldFileName {get; set ;}} /// <summary> /// path storage type /// </summary> public enum PathSaveType {/// <summary> /// create a storage directory Based on Time /// </summary> dateTimeNow = 0, /// <summary> /// create a storage directory by ID. // </summary> code = 1} private string _ Number {get; set ;} /// <summary> /// reverse return information /// </summary> public class ResponseMessage {// <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 ;} /// <summary> /// website path /// </summary> public string WebFilePath {get; set ;} /// <summary> /// get the file name /// </summary> public string FileName {get; set ;}# endregion }}