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好的，在 c# 中，我尝试了多种方法来获取列表框，以获取由其他程序填充的文本文件的内容，以列出内容。如果某些条件为真，则根据文本文件中列表框中第一项的内容执行程序。在程序运行它的过程之后，它会从文本文件中删除执行行，（这是我的程序不会继续的地方）并且我希望列表框刷新或重新加载文本文件，再次加载基于内容的程序文本文件的第一行。

现在，如果使用列表框不是要走的路，我全神贯注。我只想能够显示队列中的内容。我的程序的其余部分运行良好，只是这部分，我似乎无法弄清楚。我曾尝试使用 FileWatcher 和 bindsource，但也许我做错了什么。我对 c# 很陌生，因此感谢您的帮助。如果需要，我可以截取我的代码片段并在此处显示。谢谢。

编辑：这是我当前的一些代码。到目前为止，由于我一直在尝试不同的方法，因此它非常被屠杀。我还没有设置它来加载任何东西，仍然试图在文本文件更改时更新它。

public partial class Form1 : Form
{


    private FileSystemWatcher _watcher;
   List<string> myList =  new List<string>();

    public Form1()
    {
        InitializeComponent();

        myList = System.IO.File .ReadLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt").ToList();

        BindingSource binding = new BindingSource(myList.ToList(), null);
        GPSCOM.DataSource = binding;
        _watcher = new FileSystemWatcher();
        _watcher.Path = Path.GetDirectoryName("C:\\inetpub\\wwwroot\\imomo");
        _watcher.Filter=Path.GetFileName("C:\\inetpub\\wwwroot\\imomo\\Orders.txt");
        _watcher.SynchronizingObject = GPSCOM;
        _watcher.EnableRaisingEvents = true;
        _watcher.Changed += new FileSystemEventHandler(fileSystemWatcher1_Changed);
        _watcher.Error += new ErrorEventHandler(GPSCOMerror);
        GPSCOM.SelectionMode = SelectionMode.One;
        //myList.FirstOrDefault();
         if (serialPort.IsOpen)
        {
            return;
        }
        else
        {
            for (; ; )
            {
                switch ((string)GPSCOM.SelectedItem)
                {
                    case "task1":

                        var lines = System.IO.File.ReadAllLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt");
                        System.IO.File.WriteAllLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt", lines.Skip(1).ToArray());
                        //BindingSource binding = new BindingSource(myList.ToList(), null);

                        myList = System.IO.File.ReadLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt").ToList();
                        GPSCOM.DataSource = binding;
                        GPSCOM.SelectionMode = SelectionMode.One;
                        myList.FirstOrDefault();
                        GPSCOM.SetSelected(0, true);
                        GPSCOM.Refresh();

                        return;
                    case "task2":

                        var lines1 = System.IO.File.ReadAllLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt");
                        System.IO.File.WriteAllLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt", lines1.Skip(1).ToArray());
                        //BindingSource binding = new BindingSource(myList.ToList(), null);

                        myList = System.IO.File.ReadLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt").ToList();
                        GPSCOM.DataSource = binding;
                        GPSCOM.SelectionMode = SelectionMode.One;
                        myList.FirstOrDefault();
                        GPSCOM.SetSelected(0, true);
                        GPSCOM.Refresh();

                        return;
                    case "Task3":

                        var lines2 = System.IO.File.ReadAllLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt");
                        System.IO.File.WriteAllLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt", lines2.Skip(1).ToArray());
                        //BindingSource binding = new BindingSource(myList.ToList(), null);

                        myList = System.IO.File.ReadLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt").ToList();
                        GPSCOM.DataSource = binding;
                        GPSCOM.SelectionMode = SelectionMode.One;
                        myList.FirstOrDefault();
                        GPSCOM.SetSelected(0, true);
                        GPSCOM.Refresh();

                        return;
                    case "":
                        return;
                }
            }
            }

    }

私人无效GPSCOM_SelectedIndexChanged（对象发送者，EventArgs e）{

        BindingSource binding = new BindingSource(myList.ToList(), null);

        myList = System.IO.File.ReadLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt").ToList();
      GPSCOM.DataSource = binding;
        GPSCOM.Refresh(); 
    }        
    private void fileSystemWatcher1_Changed(object sender, FileSystemEventArgs e)
    {

        BindingSource binding = new BindingSource(myList.ToList(), null);

        myList = System.IO.File.ReadLines("C:\\inetpub\\wwwroot\\imomo\\Orders.txt").ToList();
       GPSCOM.DataSource = binding;
        GPSCOM.Refresh();


         }
    }
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1 回答 1

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你需要这样的东西吗？ 

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            listBox1.DataSource = TaskQue.GetTasks();
        }

        private void Execute(object sender, EventArgs e)
        {
            string task = TaskQue.Pop();
            //execute task;
            listBox1.DataSource = TaskQue.GetTasks();
        }

        private void AddTask(object sender, EventArgs e)
        {
            TaskQue.Push(textBox1.Text);
            listBox1.DataSource = TaskQue.GetTasks();

        }
    }

    public class TaskQue
    {
        public static string txtPath = "C:/a.txt";

        public static string Pop()
        {
            StreamReader sr = new StreamReader(txtPath);
            string result = sr.ReadLine();
            string remaining = sr.ReadToEnd();
            sr.Close();
            StreamWriter sw = new StreamWriter(txtPath, false);
            sw.Write(remaining);
            sw.Close();
            return result;
        }

        public static void Push(string s)
        {

            StreamWriter sw = new StreamWriter(txtPath, true);
            sw.WriteLine(s);
            sw.Close();
        }

        public static IEnumerable<string> GetTasks()
        {
            return new List<string>(File.ReadLines(txtPath));
        }
    }
于 2013-07-10T05:16:34.940 回答