附件上传

1、将上传控件中的上传文件，转换为二进制流，以便入库

 public static byte[] RetriveUploadFileByte(HtmlInputFile iFile)        {            if (iFile.PostedFile.ContentLength > 0)            {                byte[] buffer = new byte[iFile.PostedFile.ContentLength];                iFile.PostedFile.InputStream.Read(buffer, 0, iFile.PostedFile.ContentLength);                return buffer;            }            return new byte[0];        }

2、将上传控件中的文件，保存到服务器路径

   public static void UploadFile(HtmlInputFile iFile, string path)        {            if ((iFile.PostedFile != null) && (iFile.PostedFile.ContentLength > 0))            {                if (!Directory.Exists(path))                {                    Directory.CreateDirectory(path);                }                iFile.PostedFile.SaveAs(path + GetFileName(iFile.PostedFile.FileName));            }        }  public static string GetFileName(string filePath)        {            if (filePath.IndexOf(@"\") == -1)            {                return filePath;            }            return filePath.Substring(filePath.LastIndexOf(@"\") + 1);        }  public static void UploadFile(HtmlInputFile iFile, string path, string filename)        {            if (!Directory.Exists(path))            {                Directory.CreateDirectory(path);            }            iFile.PostedFile.SaveAs(path + filename);        }

3、通过字节创建文件

 public static string CreatFileByByte(string FileName, byte[] FileContent)        {            UrlOperate.CreatRootTempFolder();            string str = HttpContext.Current.Server.MapPath(UrlOperate.GetApplicationPath() + "AttachStorage");            string str2 = Guid.NewGuid().ToString();            string path = str + @"\" + str2;            if (!Directory.Exists(path))            {                Directory.CreateDirectory(path);            }            path = path + @"\" + FileName;            if (!File.Exists(path))            {                FileStream output = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write);                BinaryWriter writer = new BinaryWriter(output);                writer.Write(FileContent);                writer.Close();                output.Close();            }            return path;        } public static void WriteByteToFilePath(string strPath, byte[] bFile, bool isCover)        {            FileStream stream;            string path = HttpContext.Current.Server.MapPath(strPath);            if (isCover)            {                if (File.Exists(path))                {                    File.Delete(path);                }                stream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None);                stream.Write(bFile, 0, bFile.Length);                stream.Close();            }            else if (!File.Exists(HttpContext.Current.Server.MapPath(path)))            {                stream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None);                stream.Write(bFile, 0, bFile.Length);                stream.Close();            }        } public static void WriteStrToFileMapPathAppend(string strMapPath, string strContent)        {            byte[] bytes = Encoding.Default.GetBytes(strContent);            FileStream stream = new FileStream(strMapPath, FileMode.Append, FileAccess.Write, FileShare.None);            stream.Write(bytes, 0, bytes.Length);            stream.Close();        }        public static void WriteStrToFilePath(string strPath, string strContent)        {            WriteStrToMapFilePath(HttpContext.Current.Server.MapPath(strPath), strContent);        }        public static void WriteStrToFilePathAppend(string strPath, string strContent)        {            WriteStrToFileMapPathAppend(HttpContext.Current.Server.MapPath(strPath), strContent);        }        public static void WriteStrToMapFilePath(string strMapPath, string strContent)        {            byte[] bytes = Encoding.Default.GetBytes(strContent);            FileStream stream = new FileStream(strMapPath, FileMode.Create, FileAccess.Write, FileShare.None);            stream.Write(bytes, 0, bytes.Length);            stream.Close();        }

4、检查文件类型是否可以上传

 public static bool CheckFileCanUpload(string filePre, out string AllowFileLst)        {           //.DOC;.DOCX; 文件类型用分号隔开            AllowFileLst = ApplicationOperate.AllowFileLst;            AllowFileLst = AllowFileLst.ToLower();            if (!AllowFileLst.StartsWith(";"))            {                AllowFileLst = ";" + AllowFileLst;            }            if (!AllowFileLst.EndsWith(";"))            {                AllowFileLst = AllowFileLst + ";";            }            if (AllowFileLst.IndexOf(";" + filePre + ";") < 0)            {                return false;            }            return true;        }

5、删除文件夹

 public static void DeleteDir(string dirPath, bool recursive)        {            if (Directory.Exists(dirPath))            {                Directory.Delete(dirPath, recursive);            }        }

6、删除文件

  public static void DeleteFile(string filePath)        {            if (File.Exists(filePath))            {                File.Delete(filePath);            }        }

7、获取文件类型

 public static string GetFileContentType(string filename)        {            try            {                string[] strArray = filename.Split(new char[] { '.' });                string str = string.Empty;                string name = "." + strArray[strArray.Length - 1];                RegistryKey key = Registry.ClassesRoot.OpenSubKey(name);                object obj2 = key.GetValue("Content Type");                str = (obj2 != null) ? obj2.ToString() : string.Empty;                key.Close();                return str;            }            catch (Exception exception)            {                return "";            }             }

8、根据文件路径获取文件名

 public static string GetFileName(string filePath)        {            if (filePath.IndexOf(@"\") == -1)            {                return filePath;            }            return filePath.Substring(filePath.LastIndexOf(@"\") + 1);        }

9、根据文件长度，获取文件大小（B）

 public static string getFileSize(long Length)        {            double num2;            double num = Convert.ToDouble(Length);            if (num > 1000000.0)            {                num2 = num / 1048576.0;                return (num2.ToString("F") + " MB");            }            if (num > 1000.0)            {                num2 = num / 1024.0;                return (num2.ToString("F") + " KB");            }            return (num + " B");        }

10、根据文件路径，若图片则生成图片列表

 public static DataView ListFilesFromDir(string dir, string fileType)        {            DataTable table = new DataTable();            table.Columns.Add("id");            table.Columns.Add("fileName");            table.Columns.Add("fileValue");            table.Columns.Add("imgUrl");            string[] files = Directory.GetFiles(HttpContext.Current.Server.MapPath(dir));            string str = "";            for (int i = 0; i < files.Length; i++)            {                str = GetFileName(files[i]).ToLower();                if (((str.EndsWith(".gif") || str.EndsWith(".jpg")) || str.EndsWith(".bmp")) || str.EndsWith(".jpeg"))                {                    DataRow row = table.NewRow();                    row["id"] = i;                    row["fileName"] = str;                    row["fileValue"] = str.ToLower().Replace("." + fileType.ToLower(), "");                    row["imgUrl"] = "<img src=\"" + dir + "/" + str + "\" style=\"filter:alpha(opacity=65)\"  onMouseOver=\"flash(this,0)\" onMouseOut=\"flash(this,1)\" border=\"0\">";                    table.Rows.Add(row);                }            }            return table.DefaultView;        }

11、根据文件路径，读取字节

  public static byte[] ReadBytesFromFilePath(string strPath)        {            FileStream stream = new FileStream(HttpContext.Current.Server.MapPath(strPath), FileMode.Open, FileAccess.Read);            byte[] buffer = new byte[stream.Length];            stream.Read(buffer, 0, (int)stream.Length);            stream.Close();            return buffer;        }

12、替换文件名

 public static string ReplaceFileName(string fileName)        {            return fileName.Replace("/", "").Replace(@"\", "").Replace(":", "").Replace("*", "").Replace("?", "").Replace("\"", "").Replace("<", "").Replace(">", "").Replace("|", "").Replace(" ", "");        }  public static string RetriveFileName(string filename)        {            filename = filename.Replace(@"\", "/").Replace("//", "/");            if (filename.IndexOf("/") == -1)            {                return filename;            }            return filename.Substring(filename.LastIndexOf("/") + 1);        }