Vb .NET多文件系统监视实例 [英] Vb .NET multiple filesystemwatch instances

问题描述

我正在使用以下代码使用Filesystemwatch监控文件夹

I'm using the following code to monitor a folder using Filesystemwatch

Dim foldertowatch as New FileSystemWatcher()
foldertowatch.Path = source_folder

                With foldertowatch
                    'File type
                    .Filter = source_prefix & "*." & source_file_type
                    'Notify Filter
                    .NotifyFilter = .NotifyFilter Or NotifyFilters.FileName
                    .NotifyFilter = .NotifyFilter Or NotifyFilters.DirectoryName
                    'To watch sub directories....
                    .IncludeSubdirectories = sub_folder
                    'Handle new file created
                    AddHandler .Created, AddressOf Process

                    .EnableRaisingEvents = True
                End With

并使用以下子处理创建的事件

And using the below sub to handle the created event

Private Sub Process(ByVal Source As Object, ByVal evt As FileSystemEventArgs)
'To do...
End Sub

现在，我需要监控多个文件夹，每个文件夹具有不同的文件类型，以及需要执行的不同过程。例如



来源1 - 创建时监控pdf文件 - 待办事项：重命名并保存到目标1

源2 - 监控txt文件创建时 - 待办事项：重命名并保存到目标2

源3 - 创建时监控excel文件 - 待办事项：重命名并保存到目标3

等等。 ..



我尝试了什么：



我试图创建Filesystemwatch的多个实例

Now it comes to a point where I need to monitor multiple folders, each folder with different file types, and different processes need to do. For example

Source 1 - Monitor pdf file when created - To Do: Rename and save to Destination 1
Source 2 - Monitor txt file when created - To Do: Rename and save to Destination 2
Source 3 - Monitor excel file when created - To Do: Rename and save to Destination 3
and so on...

What I have tried:

I tried to created multi instances of Filesystemwatch

Dim foldertowatch(total_items) As FileSystemWatcher
        For i = 0 To 10
            foldertowatch(i) = New FileSystemWatcher()

            foldertowatch(i).Path = source(i)

                With foldertowatch(i)
                    'File type
                    .Filter = source_prefix(i) & "*." & source_file_type(i)
                    'Notify Filter
                    .NotifyFilter = .NotifyFilter Or NotifyFilters.FileName
                    .NotifyFilter = .NotifyFilter Or NotifyFilters.DirectoryName
                    'To watch sub directories....
                    .IncludeSubdirectories = sub_folder(i)
                    'Handle new file created
                    AddHandler .Created, AddressOf Process

                    .EnableRaisingEvents = True
                End With
        Next

但我不知道如何处理所引发的事件来自不同的实例。基本上，我如何知道哪个实例引发事件以便继续重命名/保存到正确的文件夹。

But I don't know how to handle the events raised from different instances. Basically, How do I know which instance raises the event so that to proceed with rename/save to correct folder.

推荐答案

FileSystemEventArgs类有一个文件路径和一个名称属性。使用它们来确定受影响的文件。添加逻辑以确定文件类型/路径，并对每种文件类型或文件夹执行任何操作。



另请参阅： docs.microsoft.com上的FileSystemEventArgs

The FileSystemEventArgs class has a file path and a name property. Use those to determine which file is affected. Add logic to determine the file type/path and do whatever you want to do with each file type or folder.

See also: FileSystemEventArgs on docs.microsoft.com

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