C# 文件上传类

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Web;



namespace Web

{

	/// <summary>

	/// 单文件上传类 (暂时不支持多文件上传)

	/// [email protected]

	/// </summary>

	public class UploadFile

	{

		/// <summary>

		/// 上传文件信息 (动态数组)

		/// </summary>

		public Dictionary<string, dynamic> FileInfo = new Dictionary<string, dynamic>();



		/// <summary>

		/// 最大文件大小

		/// </summary>

		public int FileSize = 10240;



		/// <summary>

		/// 文件保存路径

		/// </summary>

		public string FilePath = "/Upload";



		/// <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 FileType = ".jpg,.gif,.png,.bmp";



		/// <summary>

		/// 上传错误

		/// </summary>

		public bool Error;



		/// <summary>

		/// 消息

		/// </summary>

		public string Message;



		/// <summary>

		/// 保存文件

		/// </summary>

		/// <param name="FormField">表单文件域名称</param>

		public void Save(string FormField)

		{

			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];



			// 验证格式

			this.CheckingType(PostFile.FileName);



			// 获取存储目录

			var Path = this.GetPath();

			var dir = Path + this.FileInfo["Name"];



			// 注册文件信息

			this.FileInfo.Add("path", Path + this.FileInfo["Name"]);

			this.FileInfo.Add("filepath", this.FileInfo["dir"] + this.FileInfo["Name"]);



			// 保存文件

			PostFile.SaveAs(dir);

		}



		/// <summary>

		/// 获取目录

		/// </summary>

		/// <returns></returns>

		private string GetPath()

		{

			// 存储目录

			string Path = this.FilePath;



			// 目录格式

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

			string dir = HttpContext.Current.Server.MapPath(Path + "/" + Date);



			// 注册文件信息

			this.FileInfo.Add("dir", Date + '/');



			// 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.FileType.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();



			// 注册文件信息

			this.FileInfo.Add("name", Name);

			this.FileInfo.Add("Name", MD5.Encrypt(NameHash) + Type);

			this.FileInfo.Add("type", Type);



			// 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>

		public void TryError(string Msg)

		{

			this.Error = true;

			this.Message = Msg;

		}

	}

}

用法:

var Upload = new UploadFile();

Upload.Save("file");

if(Upload.Error) {

	Response.Write(Upload.Message);

} else {

	Response.Write(Upload.FileInfo["filepath"]);

	Response.Write("上传成功!");

}

转载请注明来源!