C# 从不同的类向 MainForm ListBox 添加项目

Question

我对编程还很陌生，并且已经开始了一个项目，我试图将程序的功能分成类，每个类处理与程序的特定部分相关的大部分内容。

我有一个名为 DirectoryMonitors 的类，它创建一个对象来监视带有 FileSystemWatcher 的目录。我正在尝试从这个 DirectoryMonitors 类的实例向 MainForm 上的 ListBox 添加项目。但是，似乎我无法调用 MainForm 中的方法，除非它是静态的 - 但如果它是静态的，我将无法访问我的 ListBox。

我的 DirectoryMonitor 类的相关部分:

public class DirectoryMonitorData
{
    public bool WatcherActive { get; set; } = true;
    public string EQVersion { get; set; }
    public string FolderLocation { get; set; }
}

public class DirectoryMonitor : DirectoryMonitorData
{

    private void FolderWatcher_Changed(object sender, FileSystemEventArgs e)
    {
        FileInfo fi = new FileInfo(e.FullPath);
        if (!IsFileLocked(fi))
        {
            int startPos = e.FullPath.LastIndexOf("\\") + 1;
            int endPos = e.FullPath.IndexOf("-Inventory") - startPos;
            string character = e.FullPath.Substring(startPos, endPos);
            MessageBox.Show(character);

            string[] delimiters = { ControlChars.Tab.ToString() };
            using (TextFieldParser parser = Microsoft.VisualBasic.FileIO.FileSystem.OpenTextFieldParser(e.FullPath, delimiters))
            {
                // Process the file's lines.
                while (!parser.EndOfData)
                {
                    try
                    {
                        string[] fields = parser.ReadFields();
                        MainForm.addLogToListBox(fields[0]);
                        for (int i = 1; i <= 5; i++)
                        {

                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                    }
                }
            }
        }
    }

    private bool IsFileLocked(FileInfo file)
    {
     ...
    }
}

我的 MainForm 类的相关部分:

    public partial class MainForm : Form
{


    public MainForm()
    {
        InitializeComponent();
    }


    public void addLogToListBox(string logMessage)
    {
        logsListBox.Items.Insert(0, logMessage);
    }
}

更新代码:

    public FileSystemWatcher FolderWatcher = new FileSystemWatcher();

        public DirectoryMonitor()
        {
            FolderWatcher.NotifyFilter = NotifyFilters.LastWrite;
            FolderWatcher.Filter = "*-Inventory.txt";
            FolderWatcher.Changed += FolderWatcher_Changed;
        }

public void setupDirectoryMonitorList()
        {
            foreach (DirectoryMonitorData dmd in MainForm.directoryMonitorList)
            {
                DirectoryMonitor dm = new DirectoryMonitor()
                {
                    WatcherActive = dmd.WatcherActive,
                    FolderLocation = dmd.FolderLocation,
                    EQVersion = dmd.EQVersion
                };

                if (dm.WatcherActive)
                {
                    dm.FolderWatcher.Path = dm.FolderLocation;
                    dm.FolderWatcher.EnableRaisingEvents = true;
                    dm.FolderWatcher.NotifyFilter = NotifyFilters.LastWrite;
                    dm.FolderWatcher.Filter = "*-Inventory.txt";
                    dm.FolderWatcher.Changed += FolderWatcher_Changed;
                }
                MainForm.directoryMonitorObjects.Add(dm);
            }
        }

Answer 1

将属性添加到您的 DirectoryMonitorData 类并将列表框传递给它:

public class DirectoryMonitorData
{
    public bool WatcherActive { get; set; } = true;
    public string EQVersion { get; set; }
    public string FolderLocation { get; set; }
    public ListBox Logs {get; set;}
}

然后:

DirectoryMonitor monitor = new DirectoryMonitor  { Logs = logsListBox };

现在在您的类里面，您可以简单地向该列表框添加任何内容:

Logs.Items.Add(Something);