C#使用Aforge调用摄像头拍照的方法

本文实例为大家分享了C#使用Aforge调用摄像头拍照的具体代码，供大家参考，具体内容如下

一、新建一个Winform项目

二、使用Nuget添加引用

安装下图中红色框住的两个程序包

安装完后发现安装了如下图的程序包，这是因为上述两个程序包存在对其它程序包的依赖。

三、编写程序

1.窗体设计，摄像头是下拉列表（cmbCamera，控件命名，下同），虽然示例只用到一个摄像头，但是该Demo可用于多个摄像头间切换场景，分辨率是下拉列表（cmbResolution），列出摄像头所支持的分辨率，一个VideoSourcePlayer控件（vispShoot），一个PictureBox控件（picbPreview）。

2.编写代码

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("没有找到摄像头");
     }

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();
   }
 }
}

3.测试

附上窗体设计代码：

namespace AforgeDemo
{
 partial class Form1
 {
   /// <summary>
   /// 必需的设计器变量。
   /// </summary>
   private System.ComponentModel.IContainer components = null;

/// <summary>
   /// 清理所有正在使用的资源。
   /// </summary>
   /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
   protected override void Dispose(bool disposing)
   {
     if (disposing && (components != null))
     {
       components.Dispose();
     }
     base.Dispose(disposing);
   }

#region Windows 窗体设计器生成的代码

/// <summary>
   /// 设计器支持所需的方法 - 不要修改
   /// 使用代码编辑器修改此方法的内容。
   /// </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 = "摄像头：";
     //
     // 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 = "连接";
     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 = "断开";
     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;
 }
}

来源：https://www.cnblogs.com/godbell/archive/2018/10/01/9734443.html