调用：
UploadFile uf = new UploadFile(); //参数设置 //uf.SetFilePath="" 设置保存路径，默认为upload //uf.SetFileType=".exe" 设置允许的后缀格式，默认为.pdf,.xls,.xlsx,.doc,.docx,.txt //uf.SetMaxSizeM=100 设置最大上传大小 默认10M //执行保存 uf.Save("file" /*input file 的 name */ , true); //true会自动处理同名文件，false则覆盖同名文件 //返回信息 var isError = uf.GetError;//判段是否上传成功 var webPath = uf.GetWebFilePath;//返回web路径 var response = uf.GetMessage;//返回上传信息 var filePath = uf.GetFilePath;//反回文件路径
代码：
using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Security.Cryptography;using System.Web;namespace SyntacticSugar{ /// <summary> /// ** 描述：单文件上传类 (暂时不支持多文件上传 /// ** 创始时间：2015-5-27 /// ** 修改时间：- /// ** 作者：sunkaixuan /// </summary> public class UploadFile { /// <summary> /// 文件保存路径 /// </summary> public string SetFileDirectory { get; set; } /// <summary> /// 允许上传的文件类型, 逗号分割,必须全部小写! /// /// 格式: ".gif,.exe" 或更多 /// </summary> public string SetFileType{get;set;} /// <summary> /// 允许上传多少大小(单位：M) /// </summary> public double SetMaxSizeM {get;set;} /// <summary> /// 上传错误 /// </summary> public bool GetError { get; private set; } /// <summary> /// 消息 /// </summary> public string GetMessage { get; private set; } /// <summary> /// 文件路径 /// </summary> public string GetFilePath { get; private set; } /// <summary> /// 网站路径 /// </summary> public string GetWebFilePath { get; private set; } /// <summary> /// 获取文件名 /// </summary> public string GetFileName { get; private set; } public UploadFile() { SetFileDirectory = "/upload"; SetFileType = ".pdf,.xls,.xlsx,.doc,.docx,.txt"; SetMaxSizeM = 10; } /// <summary> /// 单文件上传类 /// </summary> /// <param name="directory">文件保存路径</param> /// <param name="fileType">允许上传的文件类型</param> /// <param name="maxSizeM">允许上传多少大小(单位：M)</param> public UploadFile(string directory, string fileType,double maxSizeM) { SetFileDirectory =directory; SetFileType = fileType; SetMaxSizeM = maxSizeM; } /// <summary> /// 保存表单文件 /// </summary> /// <param name="formField"></param> /// <param name="isRenameSameFile">值为true 同名文件进行重命名，false覆盖原有文件</param> /// <param name="fileName">新的文件名</param> /// <returns></returns> public string Save(string formField, bool isRenameSameFile, string fileName = null) { try { var Response = HttpContext.Current.Response; var Request = HttpContext.Current.Request; // 获取上传的文件 HttpFileCollection File = Request.Files; HttpPostedFile PostFile = File[formField]; //文件名 fileName = string.IsNullOrEmpty(fileName) ? PostFile.FileName : fileName; //验证格式 this.CheckingType(PostFile.FileName); //验证大小 this.CheckSize(PostFile); if (GetError) return string.Empty; string webDir = string.Empty; // 获取存储目录 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); } } // 保存文件 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("对不起上传文件过大，不能超过{0}M！", SetMaxSizeM)); } } /// <summary> /// 获取目录 /// </summary> /// <returns></returns> private string GetDirectory(ref string webDir) { // 存储目录 string directory = this.SetFileDirectory; // 目录格式 string Date = DateTime.Now.ToString("yyyy-MM/dd"); webDir = directory + "/" + Date + '/'; string dir = HttpContext.Current.Server.MapPath(webDir); // 创建目录 if (Directory.Exists(dir) == false) Directory.CreateDirectory(dir); return dir; } /// <summary> /// 验证文件类型 /// </summary> /// <param name="FileName"></param> private void CheckingType(string FileName) { // 获取允许允许上传类型列表 string[] TypeList = this.SetFileType.Split(','); // 获取上传文件类型(小写) string Type = Path.GetExtension(FileName).ToLowerInvariant(); string Name = Path.GetFileNameWithoutExtension(FileName); string NameHash = Name.GetHashCode().ToString(); // 验证类型 if (TypeList.Contains(Type) == false) this.TryError("文件类型非法!"); } /// <summary> /// 抛出错误 /// </summary> /// <param name="Msg"></param> private void TryError(string msg) { this.GetError = true; this.GetMessage = msg; } }}
原标题：ASP.NET 文件上传类 简单好用
关键词：ASP.NET
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