不同厂家RFID读写器统一编程接口的实现

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不同厂家RFID读写器统一编程接口的实现

设计思想：采用工厂模式

一：准备工作：

1：准备好不同厂家的RFID读写器及配置天线和馈线，RFID标签若干

2：收集不同厂家读写器及其编程接口API

二：编写一个RFID读写器操作基类

下面是核心代码：

   /// <summary>
    /// 不同厂家RFID读写器操作基类
    /// </summary>
    public class BaseSpeedReader
    {

        protected Form mFrmScan = null;
        protected DataTable mDtEPC = null;

        public delegate void MethodInvoke();
        public delegate void NoticeEPC_EventHandler(object sender, Common.Args.NoticeEPCEventArgs e);

[Category("DMZ"), Description("通知界面层处理标签"), DefaultValue((true))]
public event NoticeEPC_EventHandler NoticeEPCHandler; //EventHandler

[Category("DMZ"), Description("通知界面层已连接读写器"), DefaultValue((true))]
public event EventHandler NoticeConnectedHandler;

       /// <summary>
        /// 通知界面层告知标签的读取信息
        /// </summary>
        public void NoticeEPC()
        {

            if (NoticeEPCHandler != null)
            {
                NoticeEPCEventArgs arg = new NoticeEPCEventArgs();
                arg.DtEPC = this.mDtEPC;
                NoticeEPCHandler(null, arg);

            }
        }

        /// <summary>
        /// 通知界面层连接读写器成功或失败
        /// </summary>
        public void NoticeConnected()
        {

            if (NoticeConnectedHandler != null)
            {
                EventArgs arg = new EventArgs();
                NoticeConnectedHandler(null, arg);

            }
        }

}

三：编写一个A厂家读写器操作类

internal class SpeedReaderForHSJC : BaseSpeedReader

{

        ///<summary>
        ///连接读取器并开始读取标签
        ///</summary>
        ///<param name="readerName"></param>
        ///<returns>连接成功返回true</returns>
        public override bool Run(string readerName)
        {
            try
            {

Reader.Logging += newEventHandler<LoggingEventArgs>(LoggingHandler);
Reader.Connected += newEventHandler<ConnectionChangedEventArgs>(ConnectedHandler);

Reader.Started += newEventHandler<StartedEventArgs>(StartedHandler);
Reader.TagsReported += newEventHandler<TagsReportedEventArgs>(TagsReportedHandler);

Reader.Connect(readerName,100); //默认端口为100

                //如果读写器连接成功，就通知基类
                if (Reader.IsConnected)
                {

base.NoticeConnected();//通知基类
Reader.Start();

}
return Reader.IsConnected;

}

            catch (Exception ex)
            {
                throw ex;
            }

return false;

}

        ///<summary>
        ///读到标签后的触发事件
        ///</summary>
        ///<param name="sender"></param>
        ///<param name="args"></param>
        public void TagsReportedHandler(object sender, TagsReportedEventArgs args)
        {
            try
            {
                foreach (Tag tagin args.TagReport.Tags)
                {
                    if (tag.Epc.Length > 17)
                    {
                        string myEPC = tag.Epc.Substring(0, 12);//从第5位开始读取
                        DataRow[] rows = mDtEPC.Select("EPC='" + myEPC +"'");

                        if (rows.Length > 0)
                        {
                            //读取次数加1
                            rows[0]["ReadCount"] = System.Convert.ToInt32(rows[0]["ReadCount"]) + 1;
                        }
                        else
                        {
                            //新增一行
                            DataRow newRow = mDtEPC.NewRow();
                            newRow["EPC"] = myEPC;
                            newRow["ReadCount"] = 1;
                            mDtEPC.Rows.Add(newRow);
                        }

}

}//end foreach

                base.NoticeEPC();//通知基类，然后触发回调函数，给界面层调用

            }
            catch (Exception ex)
            {
                throw ex;
            }

        }

}

四：编写一个B厂家读写器操作类

略

五：工厂类的实现

///<summary>

///工厂类的实现

///</summary>

public class SpeedReaderFactory{

public SpeedReaderFactory(){

}

public static BaseSpeedReader GetSpeedReader(Enum.EnumReader ReaderType)
{

            BaseSpeedReader reader =null;
            if (ReaderType == RFIDReader.Enum.EnumReader.Impinj)
            {
                reader = new SpeedReaderForImpinj();
            }

            else if (ReaderType == RFIDReader.Enum.EnumReader.HSJC)
            {
                reader = new SpeedReaderForHSJC();
            }

            //采用反射方式调用
            //string dll_path = "";
            //string startPath = System.IO.Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase);
            //startPath = startPath.Replace("file:\\", "");
            //Assembly assembly = Assembly.LoadFrom(dll_path);
            //Type objType = assembly.GetType(name);

return reader;

}

六：UI界面层的调用

1：定义读写器对象

public RFIDReader.BaseSpeedReader MultiReaderHelper
{

get
{

if (mMultiReaderHelper ==null)
{

                    if (Properties.Settings.Default.ReaderType == 1)
                    {
                        mMultiReaderHelper = RFIDReader.SpeedReaderFactory.GetSpeedReader(RFIDReader.Enum.EnumReader.Impinj);
                    }

                    else if (Properties.Settings.Default.ReaderType == 2)
                    {
                        mMultiReaderHelper = RFIDReader.SpeedReaderFactory.GetSpeedReader(RFIDReader.Enum.EnumReader.HSJC);
                    }
                }
                return mMultiReaderHelper;

}

2：给该读写器加上触发事件

public FrmScanOut()
{

InitializeComponent();

MultiReaderHelper.NoticeEPCHandler += new RFIDReader.BaseSpeedReader.NoticeEPC_EventHandler(MultiReaderHelper_NoticeEPCHandler);

MultiReaderHelper.NoticeConnectedHandler += new EventHandler(MultiReaderHelper_NoticeConnectedHandler);

}

void MultiReaderHelper_NoticeConnectedHandler(object sender,EventArgs e)
{
            Invoke((EventHandler)(delegate
            {
                lbLog.Items.Add(DateTime.Now.ToString("yyyyMMdd HH:mm:ss") +" RFID读写器启动成功！开始读取箱包...");
                this.timer1.Enabled =true;
            }));

//lbLog.Items.Add(DateTime.Now.ToString("yyyyMMdd HH:mm:ss") + " RFID读写器启动成功！开始读取箱包...");

}

void MultiReaderHelper_NoticeEPCHandler(object sender, RFIDReader.Common.Args.NoticeEPCEventArgs e)
{

//将正确的箱包显示在列表框，同时显示误读的箱包信息
base.ShowEPCMsg(e.DtEPC, dgTask, dgTaskStat,this.lbResult);

}