C# FileSystemInfo.Refresh方法代碼示例

        /// <summary>
        /// Gets a value indicating if the FileSystemInfo object is currently available
        /// </summary>
        /// <param name="fsInfo"></param>
        /// <param name="recordedSerial">if a serial is specified the return value is more reliable.</param>
        /// <returns></returns>
        public static bool IsAvailable(FileSystemInfo fsInfo, string recordedSerial)
        {
            // Get Drive Information
              DriveInfo driveInfo = GetDriveInfo(fsInfo);

              // Refresh the object information (important)
              fsInfo.Refresh();

              // Check if the file exists
              bool fileExists = fsInfo.Exists;

              // Do we have a logical volume?
              if (driveInfo != null && fileExists)
              {
            string currentSerial = driveInfo.GetVolumeSerial();
            // if we have both the recorded and the current serial we can do this very exact
            // by checking if the serials match
            if (!String.IsNullOrEmpty(recordedSerial) && !String.IsNullOrEmpty(currentSerial))
              // return the exact check result
              return (currentSerial == recordedSerial);
              }

              // return the simple check result
              return fileExists;
        }

 private void RemoveReadOnlyFlagRecursive(FileSystemInfo info) {
     info.Refresh();
     if (info is FileInfo) {
         new FileInfoWrapper(info as FileInfo).ReadOnly = false;
     } else if (info is DirectoryInfo) {
         new DirectoryInfoWrapper(info as DirectoryInfo).ReadOnly = false;
         foreach (var child in (info as DirectoryInfo).GetFileSystemInfos()) {
             this.RemoveReadOnlyFlagRecursive(child);
         }
     }
 }

 /// <summary>
 /// Deletes the file or directory if it exists.
 /// </summary>
 /// <param name="info">FileInfo or DirectoryInfo instance</param>
 public void Delete(FileSystemInfo info)
 {
     if (info.Exists)
     info.Delete();
      info.Refresh();
 }

 public void RefreshDirectory(FileSystemInfo e)
 {
     e.Refresh();
 }

 private void setAttributes(FileSystemInfo fi, ZipEntry entry)
 {
     DateTime? entryTimeUtc = getEntryTimeUtc(entry);
     if (entryTimeUtc != null)
         fi.LastWriteTimeUtc = entryTimeUtc.Value;
     if (isDos(entry) && (entry.ExternalFileAttributes != -1))
     {
         const FileAttributes mask = (FileAttributes.Archive | FileAttributes.Normal | FileAttributes.ReadOnly | FileAttributes.Hidden | FileAttributes.System);
         var entryAttributes = (FileAttributes) entry.ExternalFileAttributes;
         fi.Refresh();
         fi.Attributes = (fi.Attributes & ~mask) | (entryAttributes & mask);
     }
 }