BaslerCapture/TimedCapture.xaml.cs

using Basler.Pylon;
using System;
using System.IO;
using System.Windows;
using System.Windows.Media.Imaging;
using System.Windows.Threading;

namespace WpfApp1
{
    /// <summary>
    /// TimedCapture.xaml 的交互逻辑
    /// </summary>
    public partial class TimedCapture : Window
    {
        private readonly Camera _camera;
        private readonly DispatcherTimer _timer = new DispatcherTimer();
        private string _saveFolder = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);
        private int _intervalMs = 1000;

        public TimedCapture(Camera camera)
        {
            InitializeComponent();
            _camera = camera;

            var name = _camera?.CameraInfo?[CameraInfoKey.FriendlyName];
            CameraInfoTextBlock.Text = string.IsNullOrWhiteSpace(name) ? "未知相机" : name;
            FolderTextBox.Text = _saveFolder;
            IntervalTextBox.Text = _intervalMs.ToString();

            _timer.Tick += OnTimerTick;
            _timer.IsEnabled = false;
        }

        private void BrowseButton_Click(object sender, RoutedEventArgs e)
        {
            var selected = FolderHelper.SelectFolder("请选择保存目录");
            if (!string.IsNullOrWhiteSpace(selected))
            {
                _saveFolder = selected;
                FolderTextBox.Text = _saveFolder;
            }
        }

        private void TimedCaptureStart_Click(object sender, RoutedEventArgs e)
        {
            if (_camera == null || !_camera.IsOpen)
            {
                MessageBox.Show("相机未打开");
                return;
            }

            if (!int.TryParse(IntervalTextBox.Text, out var ms) || ms <= 0)
            {
                MessageBox.Show("请输入有效的拍摄间隔（毫秒）");
                return;
            }
            _intervalMs = ms;
            _timer.Interval = TimeSpan.FromMilliseconds(_intervalMs);

            if (string.IsNullOrWhiteSpace(FolderTextBox.Text))
            {
                MessageBox.Show("请选择保存文件夹");
                return;
            }
            _saveFolder = FolderTextBox.Text.Trim();
            if (!Directory.Exists(_saveFolder))
            {
                try { Directory.CreateDirectory(_saveFolder); } catch (Exception ex) { MessageBox.Show("创建文件夹失败：" + ex.Message); return; }
            }

            StatusTextBlock.Text = "状态：拍摄中";
            TimedCaptureStart.IsEnabled = false;
            TimedCaptureStop.IsEnabled = true;
            _timer.Start();
        }

        private void TimedCaptureStop_Click(object sender, RoutedEventArgs e)
        {
            _timer.Stop();
            StatusTextBlock.Text = "状态：已停止";
            TimedCaptureStart.IsEnabled = true;
            TimedCaptureStop.IsEnabled = false;
        }

        private void OnTimerTick(object? sender, EventArgs e)
        {
            try
            {
                // 单次抓拍
                using (IGrabResult grabResult = _camera.StreamGrabber.GrabOne(_intervalMs))
                {
                    if (grabResult != null && grabResult.GrabSucceeded)
                    {
                        var converter = new PixelDataConverter { OutputPixelFormat = PixelType.BGRA8packed };
                        byte[] buffer = new byte[grabResult.Width * grabResult.Height * 4];
                        converter.Convert(buffer, grabResult);

                        var bitmap = BitmapSource.Create(
                            grabResult.Width,
                            grabResult.Height,
                            96, 96,
                            System.Windows.Media.PixelFormats.Bgra32,
                            null,
                            buffer,
                            grabResult.Width * 4);

                        string file = Path.Combine(_saveFolder, $"Timed_{DateTime.Now:yyyyMMdd_HHmmss_fff}.png");
                        SaveImage(bitmap, file);
                        StatusTextBlock.Text = "状态：已保存 " + System.IO.Path.GetFileName(file);
                    }
                }
            }
            catch (Exception ex)
            {
                StatusTextBlock.Text = "状态：抓拍失败 - " + ex.Message;
            }
        }

        private static void SaveImage(BitmapSource bitmap, string filePath)
        {
            var encoder = new PngBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create(bitmap));
            using var stream = new FileStream(filePath, FileMode.Create, FileAccess.Write);
            encoder.Save(stream);
        }

        protected override void OnClosed(EventArgs e)
        {
            _timer.Stop();
            base.OnClosed(e);
        }
    }
}