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";

}

}

}