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;
  }
}

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