单个文件上传类(可以自定义配置)

Posted on 2007-05-30 09:53 laifangsong 阅读(538) 评论(0) 编辑收藏所属分类: 开发常用

调用可以很灵活，代码如下：

using System;
using System.Configuration;
using System.Web;
using System.Web.UI;
using System.Text;
using System.IO;

namespace aspnet_test
{
 /// <summary>
 /// 单个文件上传类
 ///
 /// 可以自定义：上传目录，上传文件类型、大小，是否使用随机上传文件名。
 ///
 /// 作者：laifangsong QQ：25313644 GMail:laifangsong@gmail.com
 /// 原文：http://www.cnblogs.com/jiny-z/archive/2007/05/30/764762.html
 /// </summary>
 public class UploadFile_Single
 {
 /* web.config设置：
 * <appSettings>
 * <add key="uploadDir" value="UploadFiles/" />
 * <add key="uploadFileExt" value="gif|jpg|jpeg|png|bmp|doc|xls|hlp|chm|rar|zip" />
 * <add key="uploadFileSize" value="2048" />
 * <add key="isUseRandFileName" value="true" />
 * </appSettings>
 *
 * private string uploadDir = ConfigurationSettings.AppSettings["uploadDir"];;
 * private string uploadFileExt = ConfigurationSettings.AppSettings["uploadFileExt"];
 * private int uploadFileSize = int.Parse(ConfigurationSettings.AppSettings["uploadFileExt"]);
 * private bool isUseRandFileName = bool.Parse(ConfigurationSettings.AppSettings["uploadFileExt"]);
 * */

 //上传目录，相对于本文件路径；以“/”结尾；如果目录不存在，会自动创建；如果要启用绝对路径，写法:“/虚拟目录名称/上传文件目录名称/”
 private string uploadDir = "UploadFiles/";
 //允许上传文件类型，逗号隔开
 private string uploadFileExt = "gif|jpg|jpeg|png|bmp|doc|xls|hlp|chm|rar|zip";
 //允许上传文件大小，k 为单位
 private int uploadFileSize = 2048;
 //是否使用随机上传文件名；如果不使用，会覆盖上传目录的同名文件
 private bool isUseRandFileName = true;

 //上传结果
 private string uploadResult = "";
 //上传文件保存路径
 private string uploadPath = "";

 public string UploadDir
 {
 get
 {
 return uploadDir;
 }
 set
 {
 uploadDir = value;
 }
 }
 public string UploadFileExt
 {
 get
 {
 return uploadFileExt;
 }
 set
 {
 uploadFileExt = value;
 }
 }
 public int UploadFileSize
 {
 get
 {
 return uploadFileSize;
 }
 set
 {
 uploadFileSize = value;
 }
 }
 public bool IsUseRandFileName
 {
 get
 {
 return isUseRandFileName;
 }
 set
 {
 isUseRandFileName = value;
 }
 }
 public string UploadResult
 {
 get
 {
 return uploadResult;
 }
 }
 public string UploadPath
 {
 get
 {
 return uploadPath;
 }
 }

 //上传文件方法
 public bool Upload(Page page)
 {
 HttpPostedFile uploadFile = page.Request.Files[0];
 //获取上传文件属性
 string fileFullName = uploadFile.FileName;
 string contentType = uploadFile.ContentType;
 int contentLength = uploadFile.ContentLength;
 //取得文件名
 string fileName = System.IO.Path.GetFileName(fileFullName);
 //取得扩展名
 string fileExt = System.IO.Path.GetExtension(fileName).Remove(0, 1);
 //检测文件类型
 if( ("|"+UploadFileExt+"|").IndexOf( ("|"+fileExt+"|") ) < 0 )
 {
 uploadResult = "上传文件格式错误！允许上传文件类型（" + uploadFileExt + "）";
 return false;
 }
 //检测文件大小
 if(contentLength<1 || contentLength>uploadFileSize*1024)
 {
 uploadResult = "上传文件大小错误！最大允许上传 " + uploadFileSize + " KB";
 return false;
 }
 //如果上传目录不存在，创建目录
 if(!uploadDir.EndsWith("/")) uploadDir += "/";
 string tempPath = "";
 string tempMapPath = "";
 string tempDir = uploadDir.Substring(0,1)!="/" ? uploadDir : uploadDir.Substring(uploadDir.IndexOf("/", 2)+1) ;
 while(tempDir.IndexOf("/")>=0)
 {
 tempPath += tempDir.Substring(0, tempDir.IndexOf("/")+1);
 tempMapPath = System.Web.HttpContext.Current.Server.MapPath(tempPath);
 if(!Directory.Exists(tempMapPath))
 {
 Directory.CreateDirectory(tempMapPath);
 }
 tempDir = tempDir.Substring(tempDir.IndexOf("/")+1);
 }
 //随机文件名
 if(isUseRandFileName)
 {
 fileName = DateTime.Now.ToString("yyyyMMddhhmmss") + (new Random()).Next(100, 1000).ToString() + "." + fileExt;
 }

 string saveFilePath = System.Web.HttpContext.Current.Server.MapPath(uploadDir) + @"\" + fileName;
 uploadFile.SaveAs(saveFilePath);

 uploadPath = uploadDir+fileName;
 //SaveUploadPathToDB(uploadPath);

 uploadResult += "文件上传成功！" + " " +
 "保存位置：" + uploadPath;

 return true;
 }

 //将上传文件路径存入数据库
 private void SaveUploadPathToDB(string uploadPath)
 {
 //string sql = "update table 1 set f_uploadpath='" & uploadPath & "' where

";
            //TSQL.ExecuteNonQuery(sql, null);
        }

    }
}

调用：

UploadFile_Single upfile = new UploadFile_Single();

upfile.Upload(this);

UploadFile_Single upfile = new UploadFile_Single();

upfile.UploadDir = "UploadFiles/";

upfile.UploadFileExt = "gif|jpg|jpeg|png|bmp";

upfile.UploadFileSize = 1024;

upfile.IsUseRandFileName = true;

upfile.Upload(this);

UploadFile_Single upfile = new UploadFile_Single();

upfile.UploadDir = "/虚拟目录名称/UploadFiles/1/2/3/";

upfile.UploadFileExt = "gif|jpg|jpeg|png|bmp";

upfile.UploadFileSize = 1024;

upfile.IsUseRandFileName = true;

            upfile.Upload(this);

               Response.Write(upfile.UploadResult); //上传结果信息
               Response.Write(upfile.UploadPath); //上传保存路径

(上传目录可以用绝对路径，也可用相对路径；如果上传目录不存在，会自动创建)