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WaitForChangedResult Structure

WaitForChangedResult Structure

Contains information on the change that occurred.

Namespace:  System.IO
Assembly:  System (in System.dll)

public struct WaitForChangedResult

The WaitForChangedResult type exposes the following members.

Public propertyChangeTypeGets or sets the type of change that occurred.
Public propertyNameGets or sets the name of the file or directory that changed.
Public propertyOldNameGets or sets the original name of the file or directory that was renamed.
Public propertyTimedOutGets or sets a value indicating whether the wait operation timed out.

Public methodEqualsIndicates whether this instance and a specified object are equal. (Inherited from ValueType.)
Public methodGetHashCodeReturns the hash code for this instance. (Inherited from ValueType.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodToStringReturns the fully qualified type name of this instance. (Inherited from ValueType.)

This example shows how to use a FileSystemWatcher synchronously by having it wait for a specific file change notification to occur.

Imports System.IO

Module Module1
    Sub Main()
        ' Define a path and a file name for a temporary file. 
        Dim pathname As String = "C:\" 
        Dim filename As String = "JunkFile.tmp" 
        Dim filepathname As String = Path.Combine(pathname, filename)

        ' Create the temporary file and then close it.

        Console.WriteLine("This application will terminate when you delete the {0} file", filepathname)

        ' Have a FileSystemWatcher monitor the path and file for changes. 
        Dim fsw As New FileSystemWatcher(pathname, filename)
        fsw.NotifyFilter = NotifyFilters.FileName
        fsw.EnableRaisingEvents = True 

        ' Suspend the calling thread until the file has been deleted. 
        Dim cr As IO.WaitForChangedResult = fsw.WaitForChanged(WatcherChangeTypes.Deleted)

        ' Tell the user the file is deleted and exit.
        Console.WriteLine("The {0} files is deleted; program is exiting", cr.Name)
    End Sub 
End Module 

' This code produces the following output. 
'  This application will terminate when you delete the C:\JunkFile.tmp file 
'  The JunkFile.tmp files is deleted; program is exiting

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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