Upload and download files in WebService

Not much to say, look directly at the code:

/*WebService of uploading files*/usingSystem;usingSystem.Collections;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Diagnostics;usingsystem.web;usingSystem.Web.Services;usingSystem.IO;/// <summary>///a summary description of the Upload. /// </summary>[WebService (Namespace ="http://tempuri.org/", Description="use the. NET Framework to upload files in Web services. ")] Public classuploadfile:system.web.services.webservice{ PublicUploadFile () {}[webmethod (Description="The Web service provides a method that returns whether the file upload succeeds or not. ")] Public stringUpload (byte[] FS,stringFileType) {stringFileName = System.DateTime.Now.ToString ("yyyymmddhhmmssms") +"."+FileType;Try{///defines and instantiates a memory stream to hold a byte array that is submitted. MemoryStream m =NewMemoryStream (FS);///define the actual file object and save the uploaded file. FileStream f =NewFileStream (Server.MapPath (".") +"\\UploadFile\\"+FileName, FileMode.Create);///writes the data in the internal memory to the physical fileM.writeto (f); M.close (); F.close (); F=NULL; M=NULL;returnFileName;}Catch(Exception ex) {return NULL;}} [WebMethod (Description="methods provided by the Web service to delete the specified file")] Public voidDelete (stringfileName) {stringFilePath = Server.MapPath (".") +"\\UploadFile\\"+FileName; File.delete (FilePath);}}/*Download File*/usingSystem;usingsystem.web;usingSystem.Collections;usingSystem.Web.Services;usingSystem.Web.Services.Protocols;usingSystem.IO;/// <summary>///a summary description of the getbinaryfile. ///WEB Services Name: Getbinaryfile///function: Returns a binary byte array of a file object on the server. /// </summary>[WebService (Namespace ="http://tempuri.org/", Description="the. NET Framework is used in Web services to deliver binaries. ")] Public classgetbinaryfile:system.web.services.webservice{/// <summary>///The Web Service provides a method that returns a byte array for a given file. /// </summary>[WebMethod (Description ="A method provided by the WEB service that returns a byte array of the given file")] Public byte[] GetFile (stringrequestfilename) {stringFileName = Server.MapPath (".") +"\\UploadFile\\"+Requestfilename;returnGetbinaryfile (fileName);}/// <summary>///getbinaryfile: Returns the byte array of the given file path. /// </summary>/// <param name= "filename" ></param>/// <returns></returns> Public byte[] Getbinaryfile (stringfilename) {if(file.exists (filename)) {Try{///Open the existing file for reading. FileStream s =file.openread (filename);returnConvertstreamtobytebuffer (s); S.close ();}Catch(Exception e) {return New byte[0];}}Else{return New byte[0];}}/// <summary>///Convertstreamtobytebuffer: Converts the given file stream to a binary byte array. /// </summary>/// <param name= "Thestream" ></param>/// <returns></returns> Public byte[] Convertstreamtobytebuffer (System.IO.Stream thestream) {intB1; System.IO.MemoryStream Tempstream=NewSystem.IO.MemoryStream (); while((B1 = Thestream.readbyte ())! =-1) {Tempstream.writebyte ( (byte) (B1)) ;}returnTempstream.toarray ();} [WebMethod (Description="the method provided by the WEB service that returns the given file type. ")] Public stringGetimagetype () {///This is just a test, you can dynamically output according to the actual file typereturn "image/jpg";}}/*Invoke upload*/stringFilePath ="c:\test.jpg"; FileStream FS=NewFileStream (FilePath, filemode.openorcreate,fileaccess.read);//Read the Data into the Byte Arraybyte[] Filebyte =New byte[FS. Length];fs. Read (Filebyte,0, (int) fs. Length); UploadFile UploadFile=NewUploadFile ();intIndexOf = Filepath.lastindexof (".")+1;stringFileext = filepath.substring (indexof, Filepath.length-indexof);stringfilename = UploadFile. Upload (Filebyte, Fileext);