知识大全 C#用Activex实现Web客户端读取RFID功能

Posted 2022-07-17 知

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　　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编写WindowsFromControls 发布WindowsFormControls为Activex 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 CBD B C F F B B ）重要的类 using System; using System Runtime InteropServices; namespace RFIDReader public class ReadRfid [DllImport( MasterRD dll )] private static extern int rf_init_(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 = ; //调用口 int baud = ; int i = ; byte model = ; byte b = ; short TagType = ; byte[] buf = new byte[ ]; try rf_init_(post baud); rf_request( model ref TagType); rf_anticoll( ref buf [ ] ref b ); string s = ; for (i = ; i < b ; i++) s = s + System Convert ToString(long Parse(buf [i] ToString()) ) ToUpper(); rf_ClosePort(); if (s == ) throw (new Exception()); return s ; catch (Exception) return ; view sourceprint? using System; using System Collections Generic; using System Linq; using System Text; using System Runtime InteropServices; namespace RFIDReader

[ComImport GuidAttribute( <SPAN > CBD B C F F B B </SPAN><SPAN > </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( CBD B C F F B B ) 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 = ; pdwEnabledOptions = ; public void SetInterfaceSafetyOptions(int riid int dwOptionsSetMask int dwEnabledOptions) throw new NotImplementedException(); #endregion private void timer _Tick(object sender EventArgs e) ReadRfid rfid=new ReadRfid(); string str = rfid CardNum; if (str != ) textBox Text = str; GetInfo(); public int TimerSpan get return timer Interval; set timer Interval = value; public string CardNum get return textBox Text; private void GetInfo() this label Text = cccc ; 为了能够在所有客户端ie上显示控件要在程序的AssemblyInfo cs里添加如下语句 [assembly: AllowPartiallyTrustedCallers()] 下一步右键该项目属性生成将为互操作注册打上勾勾

　　然后编译如果没有问题那么测试下应该可以读取RFID的ID到文本框了制作安装程序跟普通的制作安装程序一样新建一个安装程序然后删掉里面的文件夹鼠标右键空白区域》添加》项目输出》选择主输出

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