winform 引用AForge调用摄像头拍照

namespace WindowsFormsApp1
{
    partial class FormCameraVideo
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.tscbxCameras = new System.Windows.Forms.ComboBox();
            this.panelVideo = new System.Windows.Forms.Panel();
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // tscbxCameras
            // 
            this.tscbxCameras.FormattingEnabled = true;
            this.tscbxCameras.Location = new System.Drawing.Point(55, 50);
            this.tscbxCameras.Name = "tscbxCameras";
            this.tscbxCameras.Size = new System.Drawing.Size(379, 21);
            this.tscbxCameras.TabIndex = 0;
            this.tscbxCameras.SelectedIndexChanged += new System.EventHandler(this.tscbxCameras_SelectedIndexChanged);
            // 
            // panelVideo
            // 
            this.panelVideo.Location = new System.Drawing.Point(55, 94);
            this.panelVideo.Name = "panelVideo";
            this.panelVideo.Size = new System.Drawing.Size(379, 282);
            this.panelVideo.TabIndex = 1;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(64, 392);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(128, 23);
            this.button1.TabIndex = 2;
            this.button1.Text = "btnPhotograph";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.btnPhotograph_Click);
            // 
            // button2
            // 
            this.button2.Location = new System.Drawing.Point(335, 392);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(99, 23);
            this.button2.TabIndex = 3;
            this.button2.Text = "btnClose";
            this.button2.UseVisualStyleBackColor = true;
            this.button2.Click += new System.EventHandler(this.btnClose_Click);
            // 
            // FormCameraVideo
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(540, 451);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.panelVideo);
            this.Controls.Add(this.tscbxCameras);
            this.Name = "FormCameraVideo";
            this.Text = "FormCameraVideo";
            this.Load += new System.EventHandler(this.FormCameraVideo_Load);
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.ComboBox tscbxCameras;
        private System.Windows.Forms.Panel panelVideo;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Button button2;
    }
}



using AForge.Controls;
using AForge.Video.DirectShow;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Forms;
using System.Windows.Media.Imaging;

namespace WindowsFormsApp1
{
    public partial class FormCameraVideo : Form
    {
        public FormCameraVideo()
        {
            InitializeComponent();
            panelVideo.Controls.Add(videoSourcePlayer);
            videoSourcePlayer.Dock = DockStyle.Fill;

        }
        private VideoSourcePlayer videoSourcePlayer = new VideoSourcePlayer();
        private FilterInfoCollection videoDevices;
        private void FormCameraVideo_Load(object sender, EventArgs e)
        {

            try
            {
                // 枚举所有视频输入设备
                videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

                if (videoDevices.Count == 0)
                    throw new ApplicationException();

                foreach (FilterInfo device in videoDevices)
                {
                    tscbxCameras.Items.Add(device.Name);
                }

                tscbxCameras.SelectedIndex = 0;

            }
            catch (ApplicationException)
            {
                tscbxCameras.Items.Add("No local capture devices");
                videoDevices = null;
            }
        }



        private void CameraConn()
        {
            VideoCaptureDevice videoSource = new VideoCaptureDevice(videoDevices[tscbxCameras.SelectedIndex].MonikerString);
          // videoSource.DesiredFrameSize = new System.Drawing.Size(320, 240); 
          //  videoSource.DesiredFrameRate = 1;

            videoSourcePlayer.VideoSource = videoSource;
            videoSourcePlayer.Start();
        }

        private void tscbxCameras_SelectedIndexChanged(object sender, EventArgs e)
        {
            CameraConn();
        }




        private void btnPhotograph_Click(object sender, EventArgs e)
        {
            try
            {
                if (videoSourcePlayer.IsRunning)
                {
                    BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                                    videoSourcePlayer.GetCurrentVideoFrame().GetHbitmap(),
                                    IntPtr.Zero,
                                     Int32Rect.Empty,
                                    BitmapSizeOptions.FromEmptyOptions());
                    PngBitmapEncoder pE = new PngBitmapEncoder();
                    pE.Frames.Add(BitmapFrame.Create(bitmapSource));
                    string picName = GetImagePath() + "\\CameraPic" + ".jpg";
                    if (File.Exists(picName))
                    {
                        File.Delete(picName);
                    }
                    using (Stream stream = File.Create(picName))
                    {
                        pE.Save(stream);
                    }
                    //---------------拍照完成后关摄像头并刷新同时关窗体
                    if (videoSourcePlayer != null && videoSourcePlayer.IsRunning)
                    {
                        videoSourcePlayer.SignalToStop();
                        videoSourcePlayer.WaitForStop();
                    }

                    this.Close();
                    //----------------------------------------------
                }
            }
            catch (Exception ex)
            {
                System.Windows.Forms.MessageBox.Show("摄像头异常：" + ex.Message);
            }
        }

        private string GetImagePath()
        {
            string personImgPath = Path.GetDirectoryName(AppDomain.CurrentDomain.BaseDirectory)
                         + Path.DirectorySeparatorChar.ToString() + "PersonImg";
            if (!Directory.Exists(personImgPath))
            {
                Directory.CreateDirectory(personImgPath);
            }

            return personImgPath;
        }


        /// <summary>
        /// Close the camera
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnClose_Click(object sender, EventArgs e)
        {
            videoSourcePlayer.SignalToStop();
            videoSourcePlayer.WaitForStop();

        }


    }
}