using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using AForge.Video.DirectShow;namespace AforgeDemo{  public partial class Form1 : Form  {    private FilterInfoCollection videoDevices;    private VideoCaptureDevice videoDevice;    private VideoCapabilities[] videoCapabilities;    private VideoCapabilities[] snapshotCapabilities;    public Form1()    {      InitializeComponent();    }    private void Form1_Load(object sender, EventArgs e)    {      videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);      if (videoDevices.Count != 0)      {        foreach (FilterInfo device in videoDevices)        {          cmbCamera.Items.Add(device.Name);        }      }      else      {        cmbCamera.Items.Add("沒有找到攝像頭");      }      cmbCamera.SelectedIndex = 0;    }    private void cmbCamera_SelectedIndexChanged(object sender, EventArgs e)    {      if (videoDevices.Count != 0)      {        videoDevice = new VideoCaptureDevice(videoDevices[cmbCamera.SelectedIndex].MonikerString);        GetDeviceResolution(videoDevice);      }    }    private void GetDeviceResolution(VideoCaptureDevice videoCaptureDevice)    {      cmbResolution.Items.Clear();      videoCapabilities = videoCaptureDevice.VideoCapabilities;      foreach (VideoCapabilities capabilty in videoCapabilities)      {        cmbResolution.Items.Add($"{capabilty.FrameSize.Width} x {capabilty.FrameSize.Height}");      }      cmbResolution.SelectedIndex = 0;    }    private void btnConnect_Click(object sender, EventArgs e)    {      if (videoDevice != null)      {        if ((videoCapabilities != null) && (videoCapabilities.Length != 0))        {          videoDevice.VideoResolution = videoCapabilities[cmbResolution.SelectedIndex];          vispShoot.VideoSource = videoDevice;          vispShoot.Start();          EnableControlStatus(false);        }      }    }    private void EnableControlStatus(bool status)    {      cmbCamera.Enabled = status;      cmbResolution.Enabled = status;      btnConnect.Enabled = status;      btnShoot.Enabled = !status;      btnDisconnect.Enabled = !status;    }    private void btnDisconnect_Click(object sender, EventArgs e)    {      DisConnect();      EnableControlStatus(true);    }    private void DisConnect()    {      if (vispShoot.VideoSource != null)      {        vispShoot.SignalToStop();        vispShoot.WaitForStop();        vispShoot.VideoSource = null;      }    }    private void btnShoot_Click(object sender, EventArgs e)    {      Bitmap img = vispShoot.GetCurrentVideoFrame();      picbPreview.Image = img;    }    private void Form1_FormClosing(object sender, FormClosingEventArgs e)    {      DisConnect();    }  }}

namespace AforgeDemo{  partial class Form1  {    /// <summary>    /// 必需的設計器變量。    /// </summary>    private System.ComponentModel.IContainer components = null;    /// <summary>    /// 清理所有正在使用的資源。    /// </summary>    /// <param name="disposing">如果應釋放托管資源，為 true；否則為 false。</param>    protected override void Dispose(bool disposing)    {      if (disposing && (components != null))      {        components.Dispose();      }      base.Dispose(disposing);    }    #region Windows 窗體設計器生成的代碼    /// <summary>    /// 設計器支持所需的方法 - 不要修改    /// 使用代碼編輯器修改此方法的內容。    /// </summary>    private void InitializeComponent()    {      this.label1 = new System.Windows.Forms.Label();      this.cmbCamera = new System.Windows.Forms.ComboBox();      this.label2 = new System.Windows.Forms.Label();      this.cmbResolution = new System.Windows.Forms.ComboBox();      this.vispShoot = new AForge.Controls.VideoSourcePlayer();      this.picbPreview = new System.Windows.Forms.PictureBox();      this.btnConnect = new System.Windows.Forms.Button();      this.btnDisconnect = new System.Windows.Forms.Button();      this.btnShoot = new System.Windows.Forms.Button();      ((System.ComponentModel.ISupportInitialize)(this.picbPreview)).BeginInit();      this.SuspendLayout();      //       // label1      //       this.label1.AutoSize = true;      this.label1.Location = new System.Drawing.Point(39, 22);      this.label1.Name = "label1";      this.label1.Size = new System.Drawing.Size(53, 12);      this.label1.TabIndex = 0;      this.label1.Text = "攝像頭：";      //       // cmbCamera      //       this.cmbCamera.FormattingEnabled = true;      this.cmbCamera.Location = new System.Drawing.Point(98, 19);      this.cmbCamera.Name = "cmbCamera";      this.cmbCamera.Size = new System.Drawing.Size(113, 20);      this.cmbCamera.TabIndex = 1;      this.cmbCamera.SelectedIndexChanged += new System.EventHandler(this.cmbCamera_SelectedIndexChanged);      //       // label2      //       this.label2.AutoSize = true;      this.label2.Location = new System.Drawing.Point(217, 22);      this.label2.Name = "label2";      this.label2.Size = new System.Drawing.Size(53, 12);      this.label2.TabIndex = 0;      this.label2.Text = "分辨率：";      //       // cmbResolution      //       this.cmbResolution.FormattingEnabled = true;      this.cmbResolution.Location = new System.Drawing.Point(276, 19);      this.cmbResolution.Name = "cmbResolution";      this.cmbResolution.Size = new System.Drawing.Size(88, 20);      this.cmbResolution.TabIndex = 1;      //       // vispShoot      //       this.vispShoot.Location = new System.Drawing.Point(41, 54);      this.vispShoot.Name = "vispShoot";      this.vispShoot.Size = new System.Drawing.Size(591, 332);      this.vispShoot.TabIndex = 2;      this.vispShoot.Text = "videoSourcePlayer1";      this.vispShoot.VideoSource = null;      //       // picbPreview      //       this.picbPreview.Location = new System.Drawing.Point(41, 423);      this.picbPreview.Name = "picbPreview";      this.picbPreview.Size = new System.Drawing.Size(180, 175);      this.picbPreview.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;      this.picbPreview.TabIndex = 3;      this.picbPreview.TabStop = false;      //       // btnConnect      //       this.btnConnect.Location = new System.Drawing.Point(382, 19);      this.btnConnect.Name = "btnConnect";      this.btnConnect.Size = new System.Drawing.Size(80, 23);      this.btnConnect.TabIndex = 4;      this.btnConnect.Text = "連接";      this.btnConnect.UseVisualStyleBackColor = true;      this.btnConnect.Click += new System.EventHandler(this.btnConnect_Click);      //       // btnDisconnect      //       this.btnDisconnect.Enabled = false;      this.btnDisconnect.Location = new System.Drawing.Point(468, 19);      this.btnDisconnect.Name = "btnDisconnect";      this.btnDisconnect.Size = new System.Drawing.Size(80, 23);      this.btnDisconnect.TabIndex = 4;      this.btnDisconnect.Text = "斷開";      this.btnDisconnect.UseVisualStyleBackColor = true;      this.btnDisconnect.Click += new System.EventHandler(this.btnDisconnect_Click);      //       // btnShoot      //       this.btnShoot.Enabled = false;      this.btnShoot.Location = new System.Drawing.Point(552, 19);      this.btnShoot.Name = "btnShoot";      this.btnShoot.Size = new System.Drawing.Size(80, 23);      this.btnShoot.TabIndex = 4;      this.btnShoot.Text = "拍照";      this.btnShoot.UseVisualStyleBackColor = true;      this.btnShoot.Click += new System.EventHandler(this.btnShoot_Click);      //       // Form1      //       this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;      this.ClientSize = new System.Drawing.Size(677, 610);      this.Controls.Add(this.btnShoot);      this.Controls.Add(this.btnDisconnect);      this.Controls.Add(this.btnConnect);      this.Controls.Add(this.picbPreview);      this.Controls.Add(this.vispShoot);      this.Controls.Add(this.cmbResolution);      this.Controls.Add(this.cmbCamera);      this.Controls.Add(this.label2);      this.Controls.Add(this.label1);      this.Name = "Form1";      this.Text = "Form1";      this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);      this.Load += new System.EventHandler(this.Form1_Load);      ((System.ComponentModel.ISupportInitialize)(this.picbPreview)).EndInit();      this.ResumeLayout(false);      this.PerformLayout();    }    #endregion    private System.Windows.Forms.Label label1;    private System.Windows.Forms.ComboBox cmbCamera;    private System.Windows.Forms.Label label2;    private System.Windows.Forms.ComboBox cmbResolution;    private AForge.Controls.VideoSourcePlayer vispShoot;    private System.Windows.Forms.PictureBox picbPreview;    private System.Windows.Forms.Button btnConnect;    private System.Windows.Forms.Button btnDisconnect;    private System.Windows.Forms.Button btnShoot;  }}