NotifySetFileInfo Event

Fires when information about a file or directory has been changed.

Syntax

• C#
• VB.NET

public event OnNotifySetFileInfoHandler OnNotifySetFileInfo;

public delegate void OnNotifySetFileInfoHandler(object sender, CbmonitorNotifySetFileInfoEventArgs e);

public class CbmonitorNotifySetFileInfoEventArgs : EventArgs {
  public string FileName { get; }
  public int FileInformationClass { get; }
  public IntPtr Buffer { get; }
  public int BufferLength { get; }
  public int ValidBytes { get; }
  public int Status { get; }
  public int ResultCode { get; set; }
}

Public Event OnNotifySetFileInfo As OnNotifySetFileInfoHandler

Public Delegate Sub OnNotifySetFileInfoHandler(sender As Object, e As CbmonitorNotifySetFileInfoEventArgs)

Public Class CbmonitorNotifySetFileInfoEventArgs Inherits EventArgs
  Public ReadOnly Property FileName As String
  Public ReadOnly Property FileInformationClass As Integer
  Public ReadOnly Property Buffer As IntPtr
  Public ReadOnly Property BufferLength As Integer
  Public ReadOnly Property ValidBytes As Integer
  Public ReadOnly Property Status As Integer
  Public Property ResultCode As Integer
End Class

Remarks

This event fires when information about the file or directory specified by FileName has been changed; typically in response to the Windows API's NtSetInformationFile function.

Applications only need to handle this event if they've added a standard filter rule that includes the FS_NE_QUERY_FILE_INFO flag.

The FileInformationClass parameter indicates what kind of file information was set. Please refer to the NtSetInformationFile function's documentation for more information about possible values.

The Buffer parameter points to a memory buffer that, if the request was successful, contains the new file information. The BufferLength and ValidBytes parameters reflect the capacity of Buffer and the length of the data it contains (respectively), in bytes; ValidBytes may be less than BufferLength. Please refer to the Buffer Parameters topic for more information on how to work with memory buffer event parameters.

The format of the data itself is determined by the specified FileInformationClass; please refer to the NtSetInformationFile function's documentation for more information.

The Status parameter contains an NT status code that indicates the outcome of the operation; 0 indicates success. To convert this value to a Win32 error code, call the NtStatusToWin32Error method. Please note that this event won't fire for failed requests unless the ProcessFailedRequests property is enabled.

The ResultCode parameter will always be 0 when the event is fired. If the event cannot be handled in a "successful" manner for some reason, set it to a non-zero value to report an appropriate error. Note, however, that this event fires after the operation has already completed, so reporting an error won't actually affect the operation itself. Please refer to the Error Reporting and Handling topic for more information.

This event is fired asynchronously; please refer to the Event Types topic for more information.