tijian_tieying/web/dccdc.Selfhelp/frm_QRSetting.cs

using AForge.Video;
using AForge.Video.DirectShow;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace dccdc.Selfhelp
{
    public partial class frm_QRSetting : Form
    {
        public frm_QRSetting()
        {
            InitializeComponent();
        }
        private FilterInfoCollection videoDevices;
        private void frm_QRSetting_Load(object sender, EventArgs e)
        {
            videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

            if (videoDevices.Count != 0)
            {
                // add all devices to combo
                foreach (FilterInfo device in videoDevices)
                {
                    cb_cjk.Items.Add(device);
                }
            }
            else
            {
                var fi = new FilterInfo("No DirectShow devices found");

                cb_cjk.Items.Add(fi);
            }

            cb_cjk.SelectedIndex = 0;
            //throw new NotImplementedException();

        }
        private VideoCaptureDevice videoDevice;
        private void cb_cjk_SelectedIndexChanged(object sender, EventArgs e)
        {
            FilterInfo device = cb_cjk.SelectedItem as FilterInfo;
            if (device.MonikerString != "")
            {
                videoDevice = new VideoCaptureDevice(device.MonikerString);
                EnumeratedSupportedFrameSizes(videoDevice);
            }
        }
        private VideoCapabilities[] videoCapabilities;
        private void EnumeratedSupportedFrameSizes(VideoCaptureDevice videoDevice)
        {
            this.Cursor = Cursors.WaitCursor;

            cb_fbl.Items.Clear();
            //snapshotResolutionsCombo.Items.Clear();

            try
            {
                videoCapabilities = videoDevice.VideoCapabilities;
                //snapshotCapabilities = videoDevice.SnapshotCapabilities;

                foreach (VideoCapabilities capabilty in videoCapabilities)
                {
                    cb_fbl.Items.Add(string.Format("{0}x{1}",
                        capabilty.FrameSize.Width, capabilty.FrameSize.Height));
                }
                /*
                foreach (VideoCapabilities capabilty in snapshotCapabilities)
                {
                    snapshotResolutionsCombo.Items.Add(string.Format("{0} x {1}",
                        capabilty.FrameSize.Width, capabilty.FrameSize.Height));
                }*/

                if (videoCapabilities.Length == 0)
                {
                    cb_fbl.Items.Add("Not supported");
                }
                /*
                if (snapshotCapabilities.Length == 0)
                {
                    snapshotResolutionsCombo.Items.Add("Not supported");
                }
                */
                cb_fbl.SelectedIndex = 0;
                //snapshotResolutionsCombo.SelectedIndex = 0;
            }
            finally
            {
                this.Cursor = Cursors.Default;
            }
        }


        private VideoCaptureDevice videoSource;
        private void start_Click(object sender, EventArgs e)
        {
           
                    //视频捕获设备
                    videoSource = new VideoCaptureDevice(videoDevices[cb_cjk.SelectedIndex].MonikerString);
                    //捕获到新画面时触发
                    videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);
                    //先关一下，下面再打开。避免重复打开的错误
                    CloseVideoSource();
            //设置画面大小
            //videoSource.DesiredFrameSize = new Size(160, 120);
            //启动视频组件
            //videoDevice = new VideoCaptureDevice(sb);
            var videoCapabilities = videoDevice.VideoCapabilities;
            int h = int.Parse(cb_fbl.SelectedItem.ToString().Split('x')[1]);
            int w = int.Parse(cb_fbl.SelectedItem.ToString().Split('x')[0]);
            //this.Width = w;
            //this.Height = h;
            foreach (var vc in videoCapabilities)
            {
                if (vc.FrameSize.Width == w && vc.FrameSize.Height == h)
                    videoDevice.VideoResolution = vc;
                videoSource.Start();
            }
               
        }

        private void CloseVideoSource()
        {
            if (!(videoSource == null))
                if (videoSource.IsRunning)
                {
                    videoSource.SignalToStop();
                    videoSource = null;
                }

        }
        /// <summary>
        /// 全局变量，保存每一次捕获的图像
        /// </summary>
        Bitmap img = null;

        private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            img = (Bitmap)eventArgs.Frame.Clone();
            pictureBox1.Image = img;
        }

        private void btn_test_Click(object sender, EventArgs e)
        {
            start_Click(sender, e);
        }

        private void bt_save_Click(object sender, EventArgs e)
        {
            CloseVideoSource();
            if ((extend.Config.AppSettings.Settings.AllKeys as ICollection<string>).Contains("vid"))
            {
                extend.Config.AppSettings.Settings["vid"].Value = videoDevices[cb_cjk.SelectedIndex].MonikerString;
            }
            else
            {
                extend.Config.AppSettings.Settings.Add("vid", videoDevices[cb_cjk.SelectedIndex].MonikerString);
            }
            //System.Configuration.ConfigurationManager.AppSettings["vid"] = videoDevices[cb_cjk.SelectedIndex].MonikerString;
            //System.Configuration.ConfigurationManager.AppSettings["vsize"] = cb_fbl.SelectedText ;
            if ((extend.Config.AppSettings.Settings.AllKeys as ICollection<string>).Contains("vsize"))
            {
                extend.Config.AppSettings.Settings["vsize"].Value = cb_fbl.SelectedItem.ToString();
            }
            else
            {
                extend.Config.AppSettings.Settings.Add("vsize", cb_fbl.SelectedItem.ToString());
            }
            //System.Configuration.ConfigurationManager.RefreshSection("appSettings");
            extend.Config.Save();
        }
    }
}