C#使用Aforge調用攝像頭拍照_ZenDei技術網路在線

一、新建一個Winform項目二、使用Nuget添加引用安裝下圖中紅色框住的兩個程式包安裝完後發現安裝瞭如下圖的程式包，這是因為上述兩個程式包存在對其它程式包的依賴。三、編寫程式 1. 窗體設計，攝像頭是下拉列表（cmbCamera，控制項命名，下同），雖然示例只用到一個攝像頭，但是該Dem ...

一、新建一個Winform項目

二、使用Nuget添加引用

安裝下圖中紅色框住的兩個程式包

安裝完後發現安裝瞭如下圖的程式包，這是因為上述兩個程式包存在對其它程式包的依賴。

三、編寫程式

1. 窗體設計，攝像頭是下拉列表（cmbCamera，控制項命名，下同），雖然示例只用到一個攝像頭，但是該Demo可用於多個攝像頭間切換場景，解析度是下拉列表（cmbResolution），列出攝像頭所支持的解析度，一個VideoSourcePlayer控制項（vispShoot），一個PictureBox控制項（picbPreview）。

2. 編寫代碼

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();
        }
    }
}

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3. 測試

附上窗體設計代碼：

namespace AforgeDemo
{
    partial class Form1
    {
        /// <summary>
        /// 必需的設計器變數。
        /// </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 = "解析度：";
            // 
            // 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;
    }
}

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