C#用Activex實現Web客戶端讀取RFID功能的代碼

2020-01-24 03:44:11

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來源：轉載

供稿：網友

由于要在Web項目中采用RFID讀取功能，所以有必要開發Activex，一般情況下開發Activex都采用VC，VB等，但對這兩塊不是很熟悉，所以采用C#編寫Activex的方式實現。

本文方法參考網絡

1.編寫WindowsFromControls

2.發布WindowsFormControls為Activex

3.在web中使用該Activex

首先編寫windows控件

如何編寫不再詳述（注意一個地方，GUID自己用vs工具生成一個，下面會用到。我的0CBD6597-3953-4B88-8C9F-F58B1B023413）

重要的類：

復制代碼代碼如下:

 
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; //調用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 ""; 
} 

} 
} 

復制代碼代碼如下:

 
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); 
} 
} 

復制代碼代碼如下:

 
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成員 
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"; 
} 
} 
} 