C#通过Activex实现Web客户端读取RFID


		


由于要在Web项目中采用RFID读取功能，所以有必要开发Activex，一般情况下开发Activex都采用VC，VB等，但对这两块不是很熟悉，所以采用C#编写Activex的方式实现。
本文方法参考网络
1.编写WindowsFromControls
2.发布WindowsFormControls为Activex
3.在web中使用该Activex
 
首先编写windows控件

如何编写不再详述（注意一个地方，GUID自己用vs工具生成一个，下面会用到。我的0CBD6597-3953-4B88-8C9F-F58B1B023413） 
重要的类：
 

view sourceprint?using System;  
using System.Runtime.InteropServices;  
   
namespace RFIDReader  
{  
    public class ReadRfid  
    {  
        [DllImport("MasterRD.dll")]  
        private static extern int rf_init_com(int port, int baud);  
        [DllImport("MasterRD.dll")]  
        private static extern int rf_request(short icdev, byte model, ref short TagType);  
        [DllImport("MasterRD.dll")]  
        private static extern int rf_write(int icdev, char _Adr, char _Data);  
        [DllImport("MasterRD.dll")]  
        private static extern int rf_anticoll(short icdev, byte bcnt, ref byte ppsnr, ref byte pRLength);  
        [DllImport("MasterRD.dll")]  
        private static extern int rf_ClosePort();  
   
        public string CardNum  
        {  
            get { return getCardNum(); }  
        }  
        private string getCardNum()  
        {  
            int post = 4;     //调用COM1口  
            int baud = 9600;  
            int i = -1;  
            byte model = 82;  
            byte b1 = 4;  
            short TagType = 4;  
            byte[] buf1 = new byte[200];  
            try 
            {  
                rf_init_com(post, baud);  
                rf_request(0, model, ref TagType);  
                rf_anticoll(0, 4, ref buf1[0], ref  b1);  
                string s1 = "";  
                for (i = 0; i < b1; i++)  
                {  
                    s1 = s1 + System.Convert.ToString(long.Parse(buf1[i].ToString()), 16).ToUpper();  
                }  
                rf_ClosePort();  
                if (s1 == "0000")  
                { throw (new Exception()); }  
                return s1;  
            }  
            catch (Exception)  
            {  
            }  
            return "";  
        }  
   
    }  
} 
view sourceprint?   
view sourceprint?using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Text;  
using System.Runtime.InteropServices;  
   
namespace RFIDReader  
{  
    [ComImport, GuidAttribute("<SPAN style="COLOR: #800000">0CBD6597-3953-4B88-8C9F-F58B1B023413</SPAN><SPAN style="COLOR: #800000"> </SPAN>")]  
    [InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]  
    public interface IObjectSafety  
    {  
        [PreserveSig]  
        void GetInterfacceSafyOptions(  
        int riid,  
        out int pdwSupportedOptions,  
        out int pdwEnabledOptions);  
   
        [PreserveSig]  
        void SetInterfaceSafetyOptions(  
        int riid,  
        int dwOptionsSetMask,  
        int dwEnabledOptions);  
    }  
   
} 
 
using System;using System.Collections.Generic;using System.ComponentModel;using System.Drawing;using System.Data;using System.Linq;using System.Text;using System.Windows.Forms;using System.Runtime.InteropServices;using CJ;namespace RFIDReader{    [Guid("0CBD6597-3953-4B88-8C9F-F58B1B

补充：软件开发 , C# ,