C# 程序打开新窗口并定期更新

正在开发一个应用程序，它将监视一些文件，并在文件更改时，在新窗口中显示每个文件的更改

一旦用户选择要监视的文件，单击按钮就会打开一个新窗口。在后台，我触发

FileSystemWatcher

来监视此文件的更改。一旦发生变化，我必须用一些信息更新这个新打开的窗口（带有文本框）

我已经设置了新的Window1（项目->添加窗口->窗口（WPF））。 代码的其余部分如下所示：

FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = current_log.FullName.Substring(0, current_log.FullName.LastIndexOf('\\'));

watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
           | NotifyFilters.FileName | NotifyFilters.DirectoryName;

watcher.Filter = current_log.Name;
watcher.Changed += new FileSystemEventHandler(OnChanged);
watcher.EnableRaisingEvents = true;

//check if window is already active
//????

//open new window
Window1 log_window = new Window1();
log_window.Show();
log_window.txt_log_window_messages.AppendText("ddd\n");

ictionary<string, Window1> files = new Dictionary<string, Window1>();

private void init()
{
    FileSystemWatcher watcher = new FileSystemWatcher();
    watcher.Path = current_log.FullName.Substring(0, current_log.FullName.LastIndexOf('\\'));

    watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
       | NotifyFilters.FileName | NotifyFilters.DirectoryName;

    watcher.Filter = current_log.Name;
    watcher.Changed += Watcher_Changed;
    watcher.EnableRaisingEvents = true;
}

private void Watcher_Changed(object sender, FileSystemEventArgs e)
{
    if(!files.ContainsKey(e.Name))
    {
        //open new window
        Window1 log_window_new = new Window1();            

        files.Add(e.Name, log_window_new);
        log_window_new.Show();
        log_window_new.txt_log_window_messages.AppendText("ddd\n");
    }

    // Update existing window
    Window1 log_window= files[e.Name];
    log_window.txt_log_window_messages.AppendText("tttt\n");
}

问题:

• 如何检查此文件是否已激活监视器窗口，以避免再次打开它
• 如何确定应该在哪个窗口中更新

  OnChanged（）函数中的文本框

---

我建议在这里使用

词典。大概是这样的：

FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = current_log.FullName.Substring(0, current_log.FullName.LastIndexOf('\\'));

watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
           | NotifyFilters.FileName | NotifyFilters.DirectoryName;

watcher.Filter = current_log.Name;
watcher.Changed += new FileSystemEventHandler(OnChanged);
watcher.EnableRaisingEvents = true;

//check if window is already active
//????

//open new window
Window1 log_window = new Window1();
log_window.Show();
log_window.txt_log_window_messages.AppendText("ddd\n");

ictionary<string, Window1> files = new Dictionary<string, Window1>();

private void init()
{
    FileSystemWatcher watcher = new FileSystemWatcher();
    watcher.Path = current_log.FullName.Substring(0, current_log.FullName.LastIndexOf('\\'));

    watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
       | NotifyFilters.FileName | NotifyFilters.DirectoryName;

    watcher.Filter = current_log.Name;
    watcher.Changed += Watcher_Changed;
    watcher.EnableRaisingEvents = true;
}

private void Watcher_Changed(object sender, FileSystemEventArgs e)
{
    if(!files.ContainsKey(e.Name))
    {
        //open new window
        Window1 log_window_new = new Window1();            

        files.Add(e.Name, log_window_new);
        log_window_new.Show();
        log_window_new.txt_log_window_messages.AppendText("ddd\n");
    }

    // Update existing window
    Window1 log_window= files[e.Name];
    log_window.txt_log_window_messages.AppendText("tttt\n");
}

ictionary files=new Dictionary（）；
私有void init（）
{
FileSystemWatcher watcher=新的FileSystemWatcher（）；
watcher.Path=current\u log.FullName.Substring（0，current\u log.FullName.LastIndexOf（'\\'）；
watcher.NotifyFilter=NotifyFilters.LastAccess | NotifyFilters.LastWrite
|NotifyFilters.FileName | NotifyFilters.DirectoryName；
watcher.Filter=当前_log.Name；
watcher.Changed+=watcher\u Changed；
watcher.EnableRaisingEvents=true；
}
私有无效观察程序\u已更改（对象发送方、文件系统目标）
{
如果（！files.ContainsKey（e.Name））
{
//打开新窗口
Window1 log_window_new=新Window1（）；
文件。添加（例如名称、日志\窗口\新建）；
log_window_new.Show（）；
log_window_new.txt_log_window_messages.AppendText（“ddd\n”）；
}
//更新现有窗口
Window1 log_window=文件[e.Name]；
log_window.txt_log_window_messages.AppendText（“tttt\n”）；
}
您可以使用dictionaryUse Hashtable\Dictionary，文件名为键，窗口实例为值。我喜欢简单的解决方案，谢谢你们！就像BugFinder编写的一样，您可以维护一个字典，在那里您只需检查用户是否打开了文件（例如，对于文件路径，Dictionary.ContainsKey为true）。这将同时为您提供要更新的窗口的引用。