FileSystemWatcher的多个实例?????? [英] Multiple instances of FileSystemWatcher ??????

问题描述

我一直在努力尝试编写目录观察器服务。

其中一个要求是它能够观看多个

目录，而不是子目录一个父目录，但只是

多个目录。


我遇到了障碍，不知道如何绕过它。


基本上我在app.config的目录列表中读到了

将它们放入一个数组中，所以我有这样的东西：

sDirsToWatch [0] =" C：\ Temp"

sDirsToWatch [1] =" D：\ Temp"


然后我执行以下操作


For（i = 0; i< sDirsToWatch.Length; i ++）

{

FileSystemWatcher myWatcher = new System.IO.FileSystemWatcher（）;

myWatcher.NotifyFilter = NotifyFilters.DirectoryName |

NotifyFilters.FileName | NotifyFilters.Attributes;

myWatcher.Deleted + = new FileSystemEventHandler（LogDeleted）;

myWatcher.Path = sDirsToWatch [i];

myWatcher。 EnableRaisingEvents = true;

}


现在当它到达.Path行或者到达

时..EnableRaisingEvents为第二个目录，我收到一个错误：错误

读取D：\ Temp目录


我认为发生了什么是全部我正在创建的对象

被命名为相同，因此导致问题。


所以我的问题是，如何动态命名我的FileSystemWatcher

对象？


我们非常感谢任何帮助。


谢谢


大卫

解决方案

大卫，


它看起来不像情况就是这样。你是在

服务中运行吗？您确定自己可以访问驱动器（如果它是一个

服务，那么默认情况下它可能不会）。另外，你确定

目录本身是否存在？


希望这会有所帮助。

-

- Nicholas Paldino [.NET / C＃MVP]

- mv*@spam.guard.caspershouse。 com


" David" <哒************** @ gmail.com>在消息中写道

news：11 ********************* @ g14g2000cwa.googlegro ups.com ...

我一直在努力尝试编写目录观察器服务。
其中一个要求是它能够观看多个目录，而不是一个父目录的子目录，但只是
我遇到了麻烦，不知道怎么解决它。

基本上我从应用程序的目录列表中读到。配置和填充它们成为一个数组，所以我有这样的东西：
sDirsToWatch [0] =" C：\ Temp"
sDirsToWatch [1] =" D： \ Temp"

然后我做以下

For（i = 0; i< sDirsToWatch.Length; i ++）
{/> FileSystemWatcher myWatcher = new System.IO.FileSystemWatcher（）;
myWatcher.NotifyFilter = NotifyFilters.DirectoryName |
NotifyFilters.FileName | NotifyFilters.Attributes;
myWatcher.Deleted + = new FileSystemEventHandler（LogDeleted）;
myWatcher.Path = sDirsToWatch [i];
myWatcher.EnableRaisingEvents = true;
}

现在当它到达.Path行或者当它到达第二个目录的
.EnableRaisingEvents时，我收到一个错误：错误
读取D：\ Temp目录

我认为正在发生的事情是我创建的所有对象都被命名为相同，因此导致问题。

所以我的问题是，我如何动态命名我的FileSystemWatcher
对象？

任何帮助都将非常感激。

谢谢

大卫

Nicholas：


尚未将此作为服务运行，直到我将代码确定为止我将

我正在从Windows窗体应用程序执行此操作，但是一旦我获得代码工作，它将被移动到

服务。


两者都是我的本地硬盘驱动器上存在irectories，我可以自由复制并从他们那里删除文件。


感谢您的帮助


David

David，


我认为你不能看一个观察者多个目录。

尝试为你想要观看的每个目录创建一个新实例。


我认为问题在于你每次登顶时都会遇到问题。循环，你

让myWatcher指向一个新对象，而旧的对象被摧毁了

，因为没有任何东西再引用它。


Andy

I have been working on trying to write a directory watcher service.
One of the requirments is that it be able to watch multiple
directories, not sub directories of one parent directory, but just
multiple directories.

I have hit a snag and don''t know how to get around it.

Basically I read in a list of directories from the app.config and stuff
them into an array, so that I have something like this:
sDirsToWatch[0] = "C:\Temp"
sDirsToWatch[1] = "D:\Temp"

Then I do the following

For (i = 0; i < sDirsToWatch.Length; i++)
{
FileSystemWatcher myWatcher = new System.IO.FileSystemWatcher();
myWatcher.NotifyFilter = NotifyFilters.DirectoryName |
NotifyFilters.FileName | NotifyFilters.Attributes;
myWatcher.Deleted += new FileSystemEventHandler(LogDeleted);
myWatcher.Path = sDirsToWatch[i];
myWatcher.EnableRaisingEvents = true;
}

Now when it gets to either the .Path line or to when it gets to the
..EnableRaisingEvents for the 2nd directory, I get an error: Error
reading the D:\Temp directory

I think what is happening is that all of the objects that I am creating
are named the same, so its causing problems.

So my question is, how do I dynamically name my FileSystemWatcher
object ?

Any help would be most appreciated.

Thanks

David

解决方案

David,

It doesn''t look like this is the case. Are you running this in a
service? Are you sure that you have access to the drive itself (if it is a
service, then it might not, by default). Also, are you sure that the
directory itself exists?

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"David" <da**************@gmail.com> wrote in message
news:11*********************@g14g2000cwa.googlegro ups.com...

I have been working on trying to write a directory watcher service.
One of the requirments is that it be able to watch multiple
directories, not sub directories of one parent directory, but just
multiple directories.

I have hit a snag and don''t know how to get around it.

Basically I read in a list of directories from the app.config and stuff
them into an array, so that I have something like this:
sDirsToWatch[0] = "C:\Temp"
sDirsToWatch[1] = "D:\Temp"

Then I do the following

For (i = 0; i < sDirsToWatch.Length; i++)
{
FileSystemWatcher myWatcher = new System.IO.FileSystemWatcher();
myWatcher.NotifyFilter = NotifyFilters.DirectoryName |
NotifyFilters.FileName | NotifyFilters.Attributes;
myWatcher.Deleted += new FileSystemEventHandler(LogDeleted);
myWatcher.Path = sDirsToWatch[i];
myWatcher.EnableRaisingEvents = true;
}

Now when it gets to either the .Path line or to when it gets to the
.EnableRaisingEvents for the 2nd directory, I get an error: Error
reading the D:\Temp directory

I think what is happening is that all of the objects that I am creating
are named the same, so its causing problems.

So my question is, how do I dynamically name my FileSystemWatcher
object ?

Any help would be most appreciated.

Thanks

David

Nicholas:

Not running this as a service yet, until I get the code nailed down I
am doing it from a Windows Form application, but it will be moved to a
service once I get the code working.

Both directories exist on my local hard drive and I can freely copy and
delete files from them.

Thanks for the help

David

David,

I don''t think you can have one watcher watching multiple directories.
Try creating a new instance for each directory you would like to watch.

I think the problem is that everytime you hit the top of your loop, you
make myWatcher point to a new object, and the old one gets destoryed
since nothing is referencing it any longer.

Andy

这篇关于FileSystemWatcher的多个实例??????的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！