ASP. net file upload class easy to use

Call:

UploadFile UF =NewUploadFile (); //parameter Settings//uf. Setfilepath= "" Setting save path, default is upload//uf. Setfiletype= ". exe" to set the allowed suffix format, by default. Pdf,.xls,.xlsx,.doc,.docx,.txt//uf. setmaxsizem=100 set maximum upload size default 10M//Execute Saveuf. Save ("file" /*the name of the input file*/,true);//true to automatically process files with the same name, false overwrites files with the same name//return information        varIsError = uf. GetError;//whether the sentence was successfully uploaded        varWebpath = uf. Getwebfilepath;//back to Web path        varResponse = uf. GetMessage;//back to upload information        varFilePath = 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 (temporarily does not support multi-file uploads//* * Founding Date: 2015-5-27)        * * Modification Time:-///* * Sunkaixuan//</summary> public class UploadFile {//<summary>        File save path//</summary> public string Setfiledirectory {get; set;}        <summary>///allow upload of file types, comma split, must all lowercase!        Format: ". Gif,.exe" or more//</summary> public string Setfiletype{get;set;}        <summary>///allow upload of how much size (in M)////</summary> public double Setmaxsizem {get;set;}        <summary>///Upload error///</summary> public bool GetError {get; private set;} <summary>///News///</summary> public string GetMessage {get; private set;}///<summary>///file path///</summary> public string GetFilePath {get; private s Et }///<summary>//website Path///</summary> public string Getwebfilepath {get; privat e set; }///<summary>//Get file name///</summary> public string GetFileName {get; private Set            } public UploadFile () {setfiledirectory = "/upload";            Setfiletype = ". Pdf,.xls,.xlsx,.doc,.docx,.txt";        Setmaxsizem = 10; }///<summary>///Single File upload class///</summary>//<param name= "directory" > File save path </param>//<param name= "FileType" > Allowed file Types </param>//<param name= "Maxsizem" > Allow on            Number of sizes (units: M) </param> public uploadfile (string directory, string filetype,double maxsizem) {            Setfiledirectory =directory;            Setfiletype = FileType; SeTmaxsizem = Maxsizem; }///<summary>///Save form File///</summary>//<param name= "FormField" ></p aram>//<param name= "Isrenamesamefile" > value is true rename file with same name, false overwrite original file </param>//<param N Ame= "filename" > New filename </param>//<returns></returns> public string Save (string Formfiel D, bool isrenamesamefile, string fileName = null) {try {var Response = Httpc Ontext.                Current.response;                var Request = HttpContext.Current.Request;                Get uploaded files Httpfilecollection file = Request.Files;                Httppostedfile postfile = File[formfield]; 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; Get 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 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 (string. Format ("Sorry to upload the file too large, cannot exceed {0}m!            ", Setmaxsizem)); }}///<summary>//Get the Catalogue///</summary>//&LT;RETURNS&GT;&LT;/RETURNS&G        T 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 Directory if (directory.exists (dir) = = False) Directory.CreateDirectory (dir);        return dir; }///<summary>///Verify file type///</summary>//<param name= "FileName" ></pa ram> private void CheckIngtype (String FileName) {//Gets the Allow upload Type list string[] Typelist = this.            Setfiletype.split (', '); Gets the upload file type (lowercase) String type = Path.getextension (FileName).            Tolowerinvariant ();            String Name = Path.getfilenamewithoutextension (FileName); String namehash = Name.gethashcode ().            ToString (); Verify the type if (typelist.contains (type) = = False) this.        Tryerror ("File type illegal!");         }///<summary>//////</summary>//<param name= "MSG" ></param> private void Tryerror (String msg) {this.            GetError = true; This.        GetMessage = msg; }    }}

　　

ASP. net file upload class easy to use