问题描述
大家早上好,
我有一个关于 FileSystemWatcher 的问题 - 我想当文本文件 H1.txt 更改里面的值时, 我的 ASP.NET webForm 中的标签将刷新。 我做错了什么?
TextReader tr = new StreamReader(@"C:\Help\H1.txt");
Label1.Text = tr.ReadLine() + " °C";
Label1.Text += tr.ReadToEnd();
tr.Close();
FileSystemWatcher fwatcher = new FileSystemWatcher();
fwatcher.Path = Path.GetDirectoryName(@"C:\Help\H1.txt");
fwatcher.Filter = Path.GetFileName(@"C:\Help\H1.txt");
//types of events to watch
fwatcher.NotifyFilter = NotifyFilters.LastWrite;
fwatcher.EnableRaisingEvents = true;
fwatcher.Changed += Changed;
}
public void Changed(Object sender,FileSystemEventArgs e)
{
TextReader tr = new StreamReader(@"C:\Help\H1.txt");
Label1.Text = tr.ReadLine() + " °C";
Label1.Text += tr.ReadToEnd();
tr.Close();
}