C#教程之C#用Activex实现Web客户端读取RFID功能的代

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C#教程之C#用Activex实现Web客户端读取RFID功能的代

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

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：

复制代码代码如下:

			
			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 "";

			}

			}

			}

复制代码代码如下:

			
			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);

			}

			}

复制代码代码如下:

			
			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-F58B1B023413"), ProgId("RFIDReader.Reader"), ComVisible(true)]

			public partial class Reader : UserControl, IObjectSafety

			{

			public Reader()

			{

			InitializeComponent();

			}

			#region IObjectSafety成员

			public void GetInterfacceSafyOptions(int riid, out int pdwSupportedOptions, out int pdwEnabledOptions)

			{

			pdwSupportedOptions = 1;

			pdwEnabledOptions = 2;

			}

			public void SetInterfaceSafetyOptions(int riid, int dwOptionsSetMask, int dwEnabledOptions)

			{

			throw new NotImplementedException();

			}

			#endregion

			private void timer1_Tick(object sender, EventArgs e)

			{

			ReadRfid rfid = new ReadRfid();

			string str = rfid.CardNum;

			if (str != "")

			{

			textBox1.Text = str;

			GetInfo();

			}

			}

			public int TimerSpan

			{

			get

			{

			return timer1.Interval;

			}

			set

			{

			timer1.Interval = value;

			}

			}

			public string CardNum

			{

			get

			{

			return textBox1.Text;

			}

			}

			private void GetInfo()

			{

			this.label1.Text = "cccc";

			}

			}

			}