ASP.NET实现的简单易用文件上传类

2024-07-10 13:29:05

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这篇文章主要介绍了ASP.NET实现的简单易用文件上传类,本文给出实现代码和使用方法示例,需要的朋友可以参考下

调用方法：

UploadFile uf = new UploadFile();

/*可选参数*/

uf.SetIsUseOldFileName(true);//是否使用原始文件名作为新文件的文件名(默认:true),true原始文件名,false系统生成新文件名

uf.SetFileDirectory(Server.MapPath("/file/temp3/"));//文件保存路径(默认:/upload)

uf.SetFileType("*");//允许上传的文件类型, 逗号分割,必须全部小写! *表示所有 (默认值: .pdf,.xls,.xlsx,.doc,.docx,.txt,.png,.jpg,.gif )

uf.SetIsRenameSameFile(false);//重命名同名文件？

//文件以时间分目录保存

var message = uf.Save(Request.Files["Fileupload1"]); // “/file/temp3/2015/4/xx.jpg”

//文件以编号分目录保存

var message2 = uf.Save(Request.Files["Fileupload1"], "001" /*编号*/); // “/file/temp3/001/xx.jpg”

//返回信息

var isError = message.Error;//判段是否上传成功

var webPath = message.WebFilePath;//返回web路径

var msg = message.Message;//返回上传信息

var filePath = message.FilePath;//反回文件路径

var isSuccess = message.Error == false;

代码：

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Security.Cryptography;

using System.Text.RegularExpressions;

using System.Web;

using System.Web.Hosting;

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

{

private ParamsModel Params;

public UploadFile()

{

Params = new ParamsModel()

{

FileDirectory = "/upload",

FileType = ".pdf,.xls,.xlsx,.doc,.docx,.txt,.png,.jpg,.gif",

MaxSizeM = 10,

PathSaveType = PathSaveType.dateTimeNow,

IsRenameSameFile=true

};

}

/// <summary>

/// 文件保存路径(默认:/upload)

/// </summary>

public void SetFileDirectory(string fileDirectory)

{

if (fileDirectory == null)

{

throw new ArgumentNullException("fileDirectory");

}

var isMapPath = Regex.IsMatch(fileDirectory, @"[a-z]/://", RegexOptions.IgnoreCase);

if (isMapPath)

{

fileDirectory = GetRelativePath(fileDirectory);

}

Params.FileDirectory = fileDirectory;

}

/// <summary>

/// 是否使用原始文件名作为新文件的文件名(默认:true)

/// </summary>

/// <param name="isUseOldFileName">true原始文件名,false系统生成新文件名</param>

public void SetIsUseOldFileName(bool isUseOldFileName)

{

Params.IsUseOldFileName = isUseOldFileName;

}

/// <summary>

/// 允许上传的文件类型, 逗号分割,必须全部小写! *表示所有 (默认值: .pdf,.xls,.xlsx,.doc,.docx,.txt,.png,.jpg,.gif )

/// </summary>

public void SetFileType(string fileType)

{

Params.FileType = fileType;

}

/// <summary>

/// 允许上传多少大小(单位：M)

/// </summary>

public void SetMaxSizeM(double maxSizeM)

{

Params.MaxSizeM = maxSizeM;

}

/// <summary>

/// 重命名同名文件？

/// </summary>

/// <param name="isRenameSameFile">true:重命名,false覆盖</param>

public void SetIsRenameSameFile(bool isRenameSameFile)

{

Params.IsRenameSameFile = isRenameSameFile;

}

/// <summary>

/// 保存表单文件

/// </summary>

/// <param name="postFile">HttpPostedFile</param>

/// <returns></returns>

public ResponseMessage Save(HttpPostedFile postFile)

{

return CommonSave(postFile);

}

/// <summary>

/// 保存表单文件,根据编号创建子文件夹

/// </summary>

/// <param name="postFile">HttpPostedFile</param>

/// <param name="number">编号</param>

/// <returns></returns>

public ResponseMessage Save(HttpPostedFile postFile, string number)

{

Params.PathSaveType = PathSaveType.code;

_Number = number;

return CommonSave(postFile);

}

/// <summary>

/// 保存表单文件,根据HttpPostedFile

/// </summary>

/// <param name="postFile">HttpPostedFile</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>

private ResponseMessage CommonSave(HttpPostedFile postFile)

{

ResponseMessage reval = new ResponseMessage();

try

{

if (postFile == null || postFile.ContentLength == 0)

{

TryError(reval, "没有文件！");

return reval;

}

//文件名

string fileName = Params.IsUseOldFileName ? postFile.FileName : DateTime.Now.ToString("yyyyMMddhhmmssms") + Path.GetExtension(postFile.FileName);

//验证格式

this.CheckingType(reval, postFile.FileName);

//验证大小

this.CheckSize(reval, postFile);

if (reval.Error) return reval;

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 (Params.IsRenameSameFile)

{

filePath = directory + DateTime.Now.ToString("yyyyMMddhhssms") + "-" + fileName;

}

else

{

System.IO.File.Delete(filePath);

}

}

// 保存文件

postFile.SaveAs(filePath);

reval.FilePath = filePath;

reval.FilePath = webDir + fileName;

reval.FileName = fileName;

reval.WebFilePath = webDir + fileName;

return reval;

}

catch (Exception ex)

{

TryError(reval, ex.Message);

return reval;

}

}

private void CheckSize(ResponseMessage message, HttpPostedFile PostFile)

{

if (PostFile.ContentLength / 1024.0 / 1024.0 > Params.MaxSizeM)

{

TryError(message, string.Format("对不起上传文件过大，不能超过{0}M！", Params.MaxSizeM));

}

}

/// <summary>

/// 根据物理路径获取相对路径

/// </summary>

/// <param name="fileDirectory"></param>

/// <param name="sever"></param>

/// <returns></returns>

private static string GetRelativePath(string fileDirectory)

{

var sever = HttpContext.Current.Server;

fileDirectory = "/" + fileDirectory.Replace(sever.MapPath("~/"), "").TrimStart('/').Replace('//', '/');

return fileDirectory;

}

/// <summary>

/// 获取目录

/// </summary>

/// <returns></returns>

private string GetDirectory(ref string webDir)

{

var sever = HttpContext.Current.Server;

// 存储目录

string directory = Params.FileDirectory;

// 目录格式

string childDirectory = DateTime.Now.ToString("yyyy-MM/dd");

if (Params.PathSaveType == PathSaveType.code)

{

childDirectory = _Number;

}

webDir = directory.TrimEnd('/') + "/" + childDirectory + '/';

string dir = sever.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(ResponseMessage message, string fileName)

{

if (Params.FileType != "*")

{

// 获取允许允许上传类型列表

string[] typeList = Params.FileType.Split(',');

// 获取上传文件类型(小写)

string type = Path.GetExtension(fileName).ToLowerInvariant(); ;

// 验证类型

if (typeList.Contains(type) == false)

this.TryError(message, "文件类型非法!");

}

}

/// <summary>

/// 抛出错误

/// </summary>

/// <param name="Msg"></param>

private void TryError(ResponseMessage message, string msg)

{

message.Error = true;

message.Message = msg;

}

#region models

private class ParamsModel

{

/// <summary>

/// 文件保存路径

/// </summary>

public string FileDirectory { get; set; }

/// <summary>

/// 允许上传的文件类型, 逗号分割,必须全部小写!

/// </summary>

public string FileType { get; set; }

/// <summary>

/// 允许上传多少大小

/// </summary>

public double MaxSizeM { get; set; }

/// <summary>

/// 路径存储类型

/// </summary>

public PathSaveType PathSaveType { get; set; }

/// <summary>

/// 重命名同名文件?

/// </summary>

public bool IsRenameSameFile { get; set; }

/// <summary>

/// 是否使用原始文件名

/// </summary>

public bool IsUseOldFileName { get; set; }

}

/// <summary>

/// 路径存储类型

/// </summary>

public enum PathSaveType

{

/// <summary>

/// 根据时间创建存储目录

/// </summary>

dateTimeNow = 0,

/// <summary>

/// 根据ID编号方式来创建存储目录

/// </summary>

code = 1

}

private string _Number { get; set; }

/// <summary>

/// 反回信息

/// </summary>

public class ResponseMessage

{

/// <summary>

/// 上传错误

/// </summary>

public bool Error { get; set; }

/// <summary>

/// 消息

/// </summary>

public string Message { get; set; }

/// <summary>

/// 文件路径

/// </summary>

public string FilePath { get; set; }

/// <summary>

/// 网站路径

/// </summary>

public string WebFilePath { get; set; }

/// <summary>

/// 获取文件名

/// </summary>

public string FileName { get; set; }

}

#endregion

}

}