最近在做个网页跟摄像头结合

Question

ASP.NET网页怎么调用摄像头然后照下照片保存起来的！谁给个实例的？？？

Answer 1

如果这个摄像头是服务器上的，可以通过capCreateCaptureWindowA等API去调用
如果摄像头是客户端的，那是做不到的（除非开发ActiveX控件，让客户端安装）给你两个地址 去下载源码
asp.net调用摄像头源程序代码下载
http://peihexian.iteye.com/blog/710177asp.net与flash结合的摄像头拍照程序 
http://download.csdn.net/user/bbb101/asp.net与flash结合的摄像头拍照程序

Answer 2

获取图像操作写到一个Activex控件中
播放使用相关activex
http://blog.joycode.com/scottgu/archive/2009/12/18/115815.joy  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 System.Runtime.InteropServices;namespace WindowsFormsApplication24
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
      
        const short WM_CAP = 1024;
        const int WM_CAP_DRIVER_CONNECT = WM_CAP + 10;
        const int WM_CAP_DRIVER_DISCONNECT = WM_CAP + 11;
        const int WM_CAP_EDIT_COPY = WM_CAP + 30;
        const int WM_CAP_SET_PREVIEW = WM_CAP + 50;
        const int WM_CAP_SET_PREVIEWRATE = WM_CAP + 52;
        const int WM_CAP_SET_SCALE = WM_CAP + 53;
        const int WS_CHILD = 1073741824;
        const int WS_VISIBLE = 268435456;
        const short SWP_NOMOVE = 2;
        const short SWP_NOSIZE = 1;
        const short SWP_NOZORDER = 4;
        const short HWND_BOTTOM = 1;
        int iDevice = 0;
        int hHwnd;
        [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SendMessageA")]
        static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)] 
            object lParam);
        [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SetWindowPos")]
        static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
        [System.Runtime.InteropServices.DllImport("user32")]
        static extern bool DestroyWindow(int hndw);
        [System.Runtime.InteropServices.DllImport("avicap32.dll")]
        static extern int capCreateCaptureWindowA(string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
        [System.Runtime.InteropServices.DllImport("avicap32.dll")]
        static extern bool capGetDriverDescriptionA(short wDriver, string lpszName, int cbName, string lpszVer, int cbVer);
        private void OpenPreviewWindow()
        {
            int iHeight = 320;
            int iWidth = 200;
            // 
            //  Open Preview window in picturebox
            // 
            hHwnd = capCreateCaptureWindowA(iDevice.ToString(), (WS_VISIBLE | WS_CHILD), 0, 0, 640, 480, picCapture.Handle.ToInt32(), 0);
            // 
            //  Connect to device
            // 
            if (SendMessage(hHwnd, WM_CAP_DRIVER_CONNECT, iDevice, 0) == 1)
            {
                // 
                // Set the preview scale
                // 
                SendMessage(hHwnd, WM_CAP_SET_SCALE, 1, 0);
                // 
                // Set the preview rate in milliseconds
                // 
                SendMessage(hHwnd, WM_CAP_SET_PREVIEWRATE, 66, 0);
                // 
                // Start previewing the image from the camera
                // 
                SendMessage(hHwnd, WM_CAP_SET_PREVIEW, 1, 0);
                // 
                //  Resize window to fit in picturebox
                // 
                SetWindowPos(hHwnd, HWND_BOTTOM, 0, 0, iWidth, iHeight, (SWP_NOMOVE | SWP_NOZORDER));
            }
            else
            {
                // 
                //  Error connecting to device close window
                //  
                DestroyWindow(hHwnd);
            }
        }
        private void ClosePreviewWindow()
        {
            // 
            //  Disconnect from device
            // 
            SendMessage(hHwnd, WM_CAP_DRIVER_DISCONNECT, iDevice, 0);
            // 
            //  close window
            // 
            DestroyWindow(hHwnd);
        }
             private void button1_Click(object sender, EventArgs e)
        {
            iDevice = int.Parse(device_number_textBox.Text);
            OpenPreviewWindow();
        }
    }picCapture为一个PictureBox
device_number_textBox.Text=0为一个TextBox,值为0

Answer 3

也可以用 flash，好处是，flash 不像 ActiveX 需要用户客户端部署 .NET Framework，以及调整浏览器安全等级设置。http://design.yesky.com/flash/330/3461330.shtml