如何在 Windows 应用程序中的 UI 上显示文件计数

本文关键字：UI 显示文件 Windows 应用程序 | 更新日期: 2023-09-27 18:35:48

我要做的是每次读取文件时更新UI上的文件计数。同样，它甚至没有在UI上显示文件总数，当用户单击browseFolder事件的确定按钮时。任何帮助将不胜感激。以下是我的代码：

private void browse_Click(object sender, EventArgs e)
    {
        try
        {
            int fileCount = 0;
            string newFileName1 = "";
            string newFileName2 = "";
            week = textBox2.Text;
            if (week == null || week == "")
            {
                MessageBox.Show("Week cannot be null.");
                return;
            }

            DialogResult result = folderBrowserDialog1.ShowDialog();
            if (result == DialogResult.OK)
            {
                int j = 0;
                int totalNoOfFiles = 0;
                DateTime starttime = DateTime.Now;
                string folderPath = folderBrowserDialog1.SelectedPath;
                string folderName = Path.GetFileName(folderBrowserDialog1.SelectedPath);
                totalNoOfFiles = Directory.GetFiles(folderPath, "*.txt", SearchOption.AllDirectories).Length;
                lbltotalfiles.Text = Convert.ToString(totalNoOfFiles);
                progressBar1.Minimum = 0;
                progressBar1.Maximum = totalNoOfFiles;
                DirectoryInfo dInfo = new DirectoryInfo(folderPath);
                foreach (DirectoryInfo folder in dInfo.GetDirectories())
                {
                    newFileName1 = "Files_with_dates_mismatching_the_respective_week_" + folder.Name + ".txt";
                    newFileName2 = "Files_with_wrong_date_format_" + folder.Name + ".txt";
                    if (File.Exists(folderPath + "/" + newFileName1))
                    {
                        File.Delete(folderPath + "/" + newFileName1);
                    }
                    if (File.Exists(folderPath + "/" + newFileName2))
                    {
                        File.Delete(folderPath + "/" + newFileName2);
                    }
                    FileInfo[] folderFiles = folder.GetFiles();
                    if (folderFiles.Length != 0)
                    {
                        List<Task> tasks = new List<Task>();
                        foreach (var file in folderFiles)
                        {
                            fileCount = ++fileCount;
                            lblFilesRead.Text = Convert.ToString(fileCount);
                            progressBar1.Value = ++j;
                            var task = ReadFile(file.FullName, folderPath, folder.Name, week);
                            tasks.Add(task);
                        }
                        Task.WhenAll(tasks.ToArray());
                        DateTime stoptime = DateTime.Now;
                        TimeSpan totaltime = stoptime.Subtract(starttime);
                        label6.Text = Convert.ToString(totaltime);
                        textBox1.Text = folderPath;
                    }
                }
                DialogResult result2 = MessageBox.Show("Read the files successfully.", "Important message", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }
        catch (Exception)
        {
            throw;
        }
    }

如何在 Windows 应用程序中的 UI 上显示文件计数

在读取/处理文件时，正在停止负责与用户交互/重新绘制组件的 Windows 事件队列。您应该不时调用：Application.DoEvents()方法。它将允许应用程序处理消息，例如更新标签文本。

如果您想要一个非常好的用户体验，您应该使用另一个线程来处理文件，并从该线程使用label.BeginInvoke方法来更新表单上的标签。这是很好的教程：http://www.codeproject.com/Articles/10311/What-s-up-with-BeginInvoke

你也可以看看FileSystemWatcher类。从长远来看，这可能更容易维护......

class Program
{
    static void Main(string[] args)
    {
        var watcher = new System.IO.FileSystemWatcher()
        {
            Path =  @"G:'cc'",
        };
        watcher.Created += Watcher_Created;
        watcher.EnableRaisingEvents = true;
        Console.ReadKey();
    }
    private static void Watcher_Created(
        object sender, 
        FileSystemEventArgs e
        )
    {
        var folder = new DirectoryInfo(e.FullPath)
            .Parent;
        Console.WriteLine(
            folder?
                .GetFiles()
                .Length
            );
    }
}
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