ASP. NET File Upload class is simple and easy to use, asp.net File Upload class

ASP. NET File Upload class is simple and easy to use, asp.net File Upload class

Call:

UploadFile uf = new UploadFile (); // parameter setting // uf. setFilePath = "" sets the Save path. The default value is upload // uf. setFileType = ". exe "sets the allowed suffix, Which is .htm, .xls,.xlsx,.doc,.docx,.txt // uf. setMaxSizeM = 100 set the maximum upload size. The default value is 10 MB. // run the command to save uf. save ("file"/* name of input file */, true); // true will automatically process files of the same name, and false will overwrite files of the same name // return information var isError = uf. getError; // determine whether the segment is uploaded successfully. var webPath = uf. getWebFilePath; // return the web path var response = uf. getMessage; // return the upload information var filePath = uf. getFilePath; // reverse file path

 

 

 

Code:

 

Using System; using System. collections. generic; using System. IO; using System. linq; using System. security. cryptography; using System. web; 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 {// <summary> // file storage path // </summary> public string SetFileDirectory {get; set ;} /// <summary> // /The types of files that can be uploaded. Separate them with commas (,). All files must be in lower case! ///// Format: ".gif, .exe" or more // </summary> public string SetFileType {get; set ;} /// <summary> /// the size of the file to be uploaded (unit: M) /// </summary> public double SetMaxSizeM {get; set ;} /// <summary> // upload error // </summary> public bool GetError {get; private set ;} /// <summary> /// message /// </summary> public string GetMessage {get; private set ;} /// <summary> /// file path /// </summary> public string GetFilePath {Get; private set ;}//< summary> /// website path /// </summary> public string GetWebFilePath {get; private set ;} /// <summary> /// get the file name /// </summary> public string GetFileName {get; private set;} public UploadFile () {SetFileDirectory = "/upload "; setFileType = ".,.xls,.xlsx,.doc,.docx,.txt,.png,.jpg,.gif"; SetMaxSizeM = 10 ;} /// <summary> /// single file upload class /// </summary> /// <param name = "directory"> File storage path </param> /// <param name = "fileType"> supported file types </param> /// <param name = "maxSizeM"> allow upload size (unit: m) </param> public UploadFile (string directory, string fileType, double maxSizeM) {SetFileDirectory = directory; SetFileType = fileType; SetMaxSizeM = maxSizeM ;} /// <summary> /// Save the Form file, based on file name /// </summary> /// <param name = "formField"> </param> /// <param name = "isRenameSameFile"> the value is true, with the same name. file Rename, false overwrites the original file </param> /// <param name = "fileName"> New file name </param> /// <returns> </returns> public string Save (string formField, bool isRenameSameFile, string fileName = null) {var Response = HttpContext. current. response; var Request = HttpContext. current. request; // obtain the uploaded file HttpFileCollection file = Request. files; HttpPostedFile postFile = file [formField]; return Save (postFile, isRenameSameFile, fi LeName);} // <summary> // Save the Form file, based on HttpPostedFile /// </summary> /// <param name = "postFile"> HttpPostedFile </param> /// <param name = "isRenameSameFile"> the value is true, with the same name. rename the file, false overwrites the original file </param> /// <param name = "fileName"> New file name </param> /// <returns> </returns> public string Save (httpPostedFile postFile, bool isRenameSameFile, string fileName = null) {try {// file name fileName = string. isNullOrEmpty (fileName)? PostFile. fileName: fileName; // verify the format of this. checkingType (postFile. fileName); // verify the size of this. checkSize (postFile); if (GetError) return string. empty; 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 (isRenameSameFile) {filePath = directory + DateTime. now. toString ("yyyyMMddhhssms") + "-" + FileName;} else {System. IO. file. delete (filePath) ;}// save the file postFile. saveAs (filePath); GetFilePath = filePath; GetWebFilePath = webDir + fileName; GetFileName = postFile. fileName; return filePath;} catch (Exception ex) {TryError (ex. message); return string. empty ;}} private void CheckSize (HttpPostedFile PostFile) {if (PostFile. contentLength/1024.0/1024.0> SetMaxSizeM) {TryError (strin G. Format ("sorry, the uploaded file is too large and cannot exceed {0} M! ", SetMaxSizeM ));}} /// <summary> /// obtain the directory /// </summary> /// <returns> </returns> private string GetDirectory (ref string webDir) {// storage directory string directory = this. setFileDirectory; // directory Format string Date = DateTime. now. toString ("yyyy-MM/dd"); webDir = directory + "/" + Date + '/'; string dir = HttpContext. current. server. mapPath (webDir); // create the Directory if (Directory. exists (dir) = false) Directory. createDir Ecloud (dir); return dir ;} /// <summary> /// verify the file type /// </summary> /// <param name = "fileName"> </param> private void CheckingType (string fileName) {// obtain the list of allowed upload types string [] typeList = this. setFileType. split (','); // obtain the upload file type (lower case) string type = Path. getExtension (fileName ). toLowerInvariant (); // verification type if (typeList. contains (type) = false) this. tryError ("the file type is invalid! ");} /// <Summary> /// throw an error // </summary> /// <param name = "Msg"> </param> private void TryError (string msg) {this. getError = true; this. getMessage = msg ;}}}