c# 利用AForge.NET组件操作摄像头

using

System;

using

System.Collections.Generic;

using

System.ComponentModel;

using

System.Data;

using

System.Drawing;

using

System.Drawing.Imaging;

using

System.Text;

using

System.Windows.Forms;

using

System.Threading;

using

AForge;

using

AForge.Video;

using

AForge.Video.DirectShow;

using

AForge.Imaging;

using

AForge.Imaging.Filters;

using

System.IO;

namespace

Camera

{

public

partial

class

Form1 : Form

{

private

FilterInfoCollection videoDevices;

public

VideoCaptureDevice videoSource;

private

int

flag = 1;

private

string

dirc = System.AppDomain.CurrentDomain.BaseDirectory +

"JPG"

;

//截图保存的目录

public

Form1()

{

InitializeComponent();

}

private

void

Form1_Load(

object

sender,EventArgs e)

{

if

(!Directory.Exists(dirc))

Directory.CreateDirectory(dirc); 

try

{

// 枚举所有视频输入设备

videoDevices =

new

FilterInfoCollection(FilterCategory.VideoInputDevice);

if

(videoDevices.Count == 0)

throw

new

ApplicationException();

foreach

(FilterInfo device

in

videoDevices)

{

tscbxCameras.Items.Add(device.Name);

}

tscbxCameras.SelectedIndex = 0;

}

catch

(ApplicationException)

{

tscbxCameras.Items.Add(

"No local capture devices"

);

videoDevices =

null

;

}

}

private

void

toolStripButton1_Click(

object

sender,EventArgs e)

{

CameraConn();

}

private

void

CameraConn()

{

//你这里重新定义了一个对象，所以出错

videoSource =

new

VideoCaptureDevice(videoDevices[tscbxCameras.SelectedIndex].MonikerString);

videoSource.DesiredFrameSize =

new

Size(320,240);

videoSource.DesiredFrameRate = 1;

videPlayer.VideoSource = videoSource;

videPlayer.Start();

}

private

void

toolStripButton2_Click(

object

sender,EventArgs e)

{

videPlayer.SignalToStop();

videPlayer.WaitForStop();

}

private

void

Form1_FormClosing(

object

sender,FormClosingEventArgs e)

{

toolStripButton2_Click(

null

,

null

);

}

private

void

toolStripButton3_Click(

object

sender,EventArgs e)

{

//不懂截图,但还是给你简单完善了下

flag = 0;

if

(videoSource ==

null

)

{

MessageBox.Show(

"请先连接摄像头"

);

}

else

if

(!videoSource.IsRunning)

{

MessageBox.Show(

"摄像头已经关闭，请重新打开"

);

}

else

{

videoSource.NewFrame +=

new

NewFrameEventHandler(video_NewFrame);

}

}

private

void

video_NewFrame(

object

sender,NewFrameEventArgs eventArgs)

{

Bitmap bitmap = (Bitmap)eventArgs.Frame.Clone();

if

(flag == 0)

{

string

img = dirc +

"/"

+ DateTime.Now.ToString(

"yyyyMMddhhmmss"

) +

".jpg"

;

bitmap.Save(img);

flag = 1;

}

}

}

}