很不错的asp.net文件上传类c# 搜索文件 移动文件 删除文件等

using System;using System.Collections.Generic;using System.Text;using System.Data.SqlClient;using System.IO;namespace Tool{    /// <summary>    /// file operate class    /// </summary>    public class FileUpload    {        /// <summary>        /// Upload file        /// </summary>        /// <param name="path">The path of folder you want to put the file</param>        /// <param name="UpFile">A entity of class HtmlInputFile</param>        /// <param name="docType">Allowed file type eg:'PNG,JPG,TIF,GIF,BMP'</param>        /// <returns>Result of upload</returns>        //public  string Upload(string path,System.Web.UI.HtmlControls.HtmlInputFile UpFile,string docType)        public string Upload(string path, System.Web.UI.WebControls.FileUpload UpFile, string docType)        {            string modifyFileName = DateTime.Now.Year.ToString();            modifyFileName += DateTime.Now.Month.ToString();            modifyFileName += DateTime.Now.Day.ToString();            modifyFileName += DateTime.Now.Hour.ToString();            modifyFileName += DateTime.Now.Minute.ToString();            modifyFileName += DateTime.Now.Second.ToString();            modifyFileName += DateTime.Now.Millisecond.ToString();            string value = UpFile.FileName;            string tFileType = value.Substring(value.LastIndexOf(".") + 1);            string[] allowedType = docType.Split(',');            bool TypeMatched = false;            if (value == "" || value == null)            {                return "-1";             //Error:Uploaded file is null!            }            else            {                int FileLength = UpFile.PostedFile.ContentLength;                if (FileLength > (20 * 1024 * 1024))                {                    return "-2";        //Error:Uploaded file is too large!                }                foreach (string type in allowedType)                {                    if (type.ToLower().IndexOf(tFileType) != -1)                    {                        TypeMatched = true;                    }                }                if (!TypeMatched)                {                    return "-3"; //Error:Wrong type of Uploaded file!                }                string dirPath = System.Web.HttpContext.Current.Server.MapPath(path);                System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(dirPath);                if (!dir.Exists)                {                    dir.Create();                }                path = path + modifyFileName + "." + tFileType;                UpFile.PostedFile.SaveAs(System.Web.HttpContext.Current.Server.MapPath(path));                return System.Web.HttpContext.Current.Server.MapPath(path);     //Upload succeed!            }        }        /// <summary>        /// Search a file from the mapped path         /// </summary>        /// <param name="path">The mappsed path</param>        /// <param name="fileName">The file name for search</param>        /// <returns>Result of search</returns>        public int SearchFile(string path, string fileName)        {            System.IO.DirectoryInfo SearchDir = new System.IO.DirectoryInfo(System.Web.HttpContext.Current.Server.MapPath(path));            foreach (System.IO.FileInfo File in SearchDir.GetFiles())            {                if (File.Name.IndexOf(fileName) != -1)                {                    return 1;// Find                }            }            return 0;//Not find        }        /// <summary>        /// Delete a file        /// </summary>        /// <param name="path">The path of file</param>        /// <returns>The result of delete</returns>        public int DeleteFile(string path)        {            System.IO.FileInfo File = new System.IO.FileInfo(System.Web.HttpContext.Current.Server.MapPath(path));            if (File.Exists)            {                if (File.IsReadOnly)                {                    return -1;//The file is readonly                }                else                {                    File.Delete();                    return 1;//Delete succeed                }            }            else            {                return 0;//The file is not exsits            }        }        /// <summary>        /// Move a file        /// </summary>        /// <param name="sFolder">source folder</param>        /// <param name="sName">source name</param>        /// <param name="tFolder">object folder</param>        /// <param name="tName">object name</param>        /// <returns></returns>        public int FileMove(string sFolder, string sName, string tFolder, string tName)        {            string[] arrDirs = Directory.GetDirectories(sFolder);            string[] arrFiles = Directory.GetFiles(sFolder);            if (arrFiles.Length != 0)            {                //copy this file                 File.Copy(sFolder + "//" + sName, tFolder + "//" + tName, true);                //delete the old file                return DeleteFile(sFolder + "//" + sName);            }            else            {                return -1;            }        }        /// <summary>        /// Move selected files        /// </summary>        /// <param name="sFolder">source folder</param>        /// <param name="tFolder">object folder</param>        public void FileMove(string sFolder, string tFolder)        {            string[] arrDirs = Directory.GetDirectories(sFolder);            string[] arrFiles = Directory.GetFiles(sFolder);            if (arrFiles.Length != 0)            {                for (int i = 0; i < arrFiles.Length; i++)                {                    //copy these files                    File.Copy(sFolder + "//" + Path.GetFileName(arrFiles[i]), tFolder + "//" + Path.GetFileName(arrFiles[i]), true);                    //delete old files                    DeleteFile(sFolder + "//" + Path.GetFileName(arrFiles[i]));                }            }        }    }}