C#使用Aforge調用攝像頭拍照

1、 新建一個Winform項目

2、使用Nuget添加引用

 

安裝下圖中紅色框住的兩個程序包

 

 安裝完後發現安裝了以下圖的程序包，這是由於上述兩個程序包存在對其它程序包的依賴。

 

 3、編寫程序

       1. 窗體設計，攝像頭是下拉列表（cmbCamera，控件命名，下同），雖然示例只用到一個攝像頭，可是該Demo可用於多個攝像頭間切換場景，分辨率是下拉列表（cmbResolution），列出攝像頭所支持的分辨率，一個VideoSourcePlayer控件（vispShoot），一個PictureBox控件（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>
        /// 必需的設計器變量。 /// </summary>
        private System.ComponentModel.IContainer components = null; /// <summary>
        /// 清理全部正在使用的資源。 /// </summary>
        /// <param name="disposing">若是應釋放託管資源，爲 true；不然爲 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 = "鏈接"; 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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