HttpPostedFileBase File Upload instance detailed

This article mainly introduces the ASP. NET MVC httppostedfilebase file upload, has a certain reference value, interested in small partners can refer to

This article introduces the ASP. NET MVC httppostedfilebase file upload, share to everybody, hope to be helpful to everybody

HttpPostedFileBase file Upload, support multi-file upload, if there is a picture, support thumbnail save

File Transfer Information Encapsulation

<summary>////  file generation method///  </summary> public  class Upfilemessage {//    <summary >///File name///    </summary> public    string OriginalFilename {get; set;}    <summary>//whether to save thumbnails///    </summary> public    bool Isimage {get; set;}    <summary>///file stream///    </summary> public    stream FileStream {get; set;}    <summary>///How to generate thumbnails///    [wh]-specified width///[    h]-specified high, proportionally relaxed//    [w]-specified width, scaled high    // </summary> public    string Mode {get; set;}    <summary>///thumbnail height////    </summary> public    int? thumbheight {get; set;}    <summary>///thumbnail width///    </summary> public    int? thumbwidth {get; set;}  }

File Upload returns results

<summary>///  File Upload returns results///  </summary> public  class Upfileresultmessage  {    // <summary>///whether the file was saved successfully///    </summary> public    bool Issuccess {get; set;}    <summary>///error message///    </summary> public    string Message {get; set;}    <summary>    ///Original file name-(no extension)///    </summary> public    string FileName {get; set;}    <summary>///    file name extension///    </summary> public    string Filesuffix {get; set;}    <summary>////    file name save path///    </summary> public    string FilePath {get; set;}    <summary>//    The file type is picture///    thumbnail save path///</summary> public    string Thumbpath {get; Set }    ///<summary>///Save file name (no extension)///    </summary> public    string Savefilename {get; set;} ///<summary>///    file self-increment ID///</summary> public    int[] Fileidarray {get; set;}  }

File Upload class Library

You need to reference the System.Web namespace and inherit [System.Web.UI.Page], calling the Server.MapPath method

public class FileUtil:System.Web.UI.Page {//<summary>///image Upload///</summary>//<param Name= "Filemessage" > File generation Method </param>//<returns></returns> public upfileresultmessage Uploadfil        E (upfilemessage filemessage) {try {string now = DateTime.Today.ToString ("YyyyMMdd"); String guid = Guid.NewGuid ().        ToString ();        Get file name extension var filesuffix = path.getextension (filemessage.originalfilename);        var uploadfolder = Path.Combine (System.Web.HttpContext.Current.Server.MapPath (Parmsconfig.upfilepathurl), now); if (!        Directory.Exists (Uploadfolder)) {directory.createdirectory (Uploadfolder);        }//Save file name string Savefilename = GUID + filesuffix;        String filePath = Path.Combine (Uploadfolder, savefilename); Upfileresultmessage Upfileresult = new Upfileresultmessage () {issuccess = true, FileName = Path. GetfilenamewithoutexteNsion (filemessage.originalfilename), Filesuffix = Filesuffix, FilePath = string.        Format (@ "{0}/{1}", Parmsconfig.upfileipaddressurl, now), Savefilename = GUID}; using (Stream Sourcestream = Filemessage.filestream) {using (FileStream Targetstream = new FileStream (fil            Epath, FileMode.Create, FileAccess.Write, Fileshare.none)) {const int bufferlen = 1024x768 * 4;//4KB            byte[] buffer = new Byte[bufferlen];            int count = 0; while ((count = sourcestream.read (buffer, 0, Bufferlen)) > 0) {targetstream.write (buffer, 0, C            Ount); }}//When uploading a file as a picture, you need to create a thumbnail if (filemessage.isimage) {var uploadthumbfolder = Pa Th.            Combine (Uploadfolder, "Thumb"); if (!            Directory.Exists (Uploadthumbfolder)) {directory.createdirectory (Uploadthumbfolder); } using (FileStream targetstream = new FileStream (FilePath, FileMode.Open, FileAccess.Read, Fileshare.none)) {System.Drawing.Im              Age image = System.Drawing.Image.FromStream (Targetstream); int width = image.              Width; int height = image.              Height;              int thumbwidth = 0;              int thumbheight = 0; Switch (filemessage.mode) {case "WH"://Specify aspect scaling (possibly deformed) Thumbwidth = Filemessa Ge. Thumbwidth.hasvalue?                  filemessage.thumbwidth.value:200; Thumbheight = FileMessage.ThumbHeight.HasValue?                  filemessage.thumbheight.value:200;                Break Case "W"://Specify width, high proportionally thumbwidth = FileMessage.ThumbWidth.HasValue?                  filemessage.thumbwidth.value:200;                  Thumbheight = height * thumbwidth/width;                Break Case "H"://Specify high, wide proportionally thumbheight = FileMessage.ThumbHeight.HasValue? Filemessage.thumbheight.value:200;                  Thumbwidth = width * thumbheight/height;                Break Default:thumbwidth = FileMessage.ThumbWidth.HasValue?                  filemessage.thumbwidth.value:200;                  Thumbheight = height * thumbwidth/width;              Break              } String thumbfilepath = Path.Combine (Uploadthumbfolder, savefilename);              Createthumbnail (Thumbfilepath, Targetstream, Thumbwidth, thumbheight); Upfileresult.thumbpath = string.            Format (@ "{0}/{1}/thumb", Parmsconfig.upfileipaddressurl, now);      }}} return upfileresult; } catch (Exception ex) {return new Upfileresultmessage () {issuccess = false, Message = ex.      Message}; }}///<summary>//Create thumbnails of the specified picture file stream///</summary>//<param name= "Thumbfilepath" > Thumbnail files Save path </param>//<param name= "FileStream" > Raw file Stream </param>//<param Name= "width" > Thumbnail width </param>//<param name= "height" > thumbnail height </param> private void Createthumbnail (s Tring Thumbfilepath, Stream fileStream, int width, int height) {using (Image image = Image.fromstream (FileStream) ) {using (Image thumbnail = image. Getthumbnailimage (width, height, null, IntPtr.Zero)) {thumbnail.        Save (Thumbfilepath); }      }    }  }

Invocation mode

var upfilemsg = new Upfilemessage ()          {            Isimage = true,            originalfilename = Platformimg[i]. FileName,            FileStream = Platformimg[i]. InputStream,            thumbwidth = thumbwidth,            Mode = "W"          };         var  upfileresultmsg = new Fileutil (). UploadFile (UPFILEMSG);