你这个是想文件发生改变时，自动调用一个函数，做出一些操作呢。
还是有一个按钮（或者别的什么），你去点击一下，然后检测下一个文件，是否发生了变化？
下面的代码，监控d盘下的所有.txt文件的修改
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static
void
TestFileSystemWatcher()
{
FileSystemWatcher watcher =
new
FileSystemWatcher();
try
{
watcher.Path =
@"d:\Test"
;
}
catch
(ArgumentException e)
{
Console.WriteLine(e.Message);
return
;
}
//设置监视文件的哪些修改行为
watcher.NotifyFilter = NotifyFilters.LastAccess
| NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
watcher.Filter =
"*.txt"
;
watcher.Changed +=
new
FileSystemEventHandler(OnChanged);
watcher.Created +=
new
FileSystemEventHandler(OnChanged);
watcher.Deleted +=
new
FileSystemEventHandler(OnChanged);
watcher.Renamed +=
new
RenamedEventHandler(OnRenamed);
watcher.EnableRaisingEvents =
true
;
Console.WriteLine(
@"Press 'q' to quit app."
);
while
(Console.Read() !=
'q'
);
}
static
void
OnChanged(
object
source, FileSystemEventArgs e)
{
Console.WriteLine(
"File：{0} {1}！"
, e.FullPath, e.ChangeType);
}
static
void
OnRenamed(
object
source, RenamedEventArgs e)
{
Console.WriteLine(
"File：{0} renamed to\n{1}"
, e.OldFullPath, e.FullPath);
}
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