大家帮忙解决个PDA程序开发上的一个有关问题

using System;
using System.Drawing;
using System.Collections;
using System.Windows.Forms;
using System.Data;
using System.Text;

using MEC.Nurse.Provider;

namespace RFIDDemo
{
    /// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Button btnStart;
        private System.Windows.Forms.Button btnStop;
        private System.Windows.Forms.TextBox txtData;
        private System.Windows.Forms.Button btnClearText;
        private System.Windows.Forms.Button btnStartRead;
        private System.Windows.Forms.Button btnReadStop;
        private System.Windows.Forms.Label lblInfo;

        public Form1()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //

            // 绑定函数到OnDataAttrived事件上
            // 在读取到RFID数据后会回调绑定到该事件上的函数
            RFID.GetInstance().OnDataArrived += new RFIDEventHandler(OnDataArrived);

            // 获取rfid服务的状态
            if (RFID.GetInstance().GetServerState())
            {
                
                StartEnable();
                lblInfo.Text = "RFID服务已启动！";
            }
            else
            {
                if(RFID.GetInstance().Start())
                {
                    StartEnable();
                    lblInfo.Text = "RFID服务启动成功！";
                    MessageBox.Show("aaaa");
                }
                else
                {
                    StopEnable();
                    lblInfo.Text = "RFID服务启动失败！";
                }
            }
        }
        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            base.Dispose( disposing );
        }
        #region Windows 窗体设计器生成的代码
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.btnStart = new System.Windows.Forms.Button();
            this.btnStop = new System.Windows.Forms.Button();
            this.txtData = new System.Windows.Forms.TextBox();
            this.btnClearText = new System.Windows.Forms.Button();
            this.lblInfo = new System.Windows.Forms.Label();
            this.btnReadStop = new System.Windows.Forms.Button();
            this.btnStartRead = new System.Windows.Forms.Button();
            // 
            // btnStart
            // 
            this.btnStart.Location = new System.Drawing.Point(16, 8);
            this.btnStart.Size = new System.Drawing.Size(88, 24);
            this.btnStart.Text = "启动";
            this.btnStart.Click += new System.EventHandler(this.btnStart_Click);
            // 
            // btnStop
            // 
            this.btnStop.Location = new System.Drawing.Point(120, 8);
            this.btnStop.Size = new System.Drawing.Size(88, 24);
            this.btnStop.Text = "停止 ";
            this.btnStop.Click += new System.EventHandler(this.btnStop_Click);
            // 
            // txtData
            // 
            this.txtData.Location = new System.Drawing.Point(16, 72);
            this.txtData.Multiline = true;
            this.txtData.Size = new System.Drawing.Size(192, 152);
            this.txtData.Text = "";
            // 
            // btnClearText
            // 
            this.btnClearText.Location = new System.Drawing.Point(16, 232);
            this.btnClearText.Size = new System.Drawing.Size(72, 32);
            this.btnClearText.Text = "清空";
            this.btnClearText.Click += new System.EventHandler(this.btnClearText_Click);
            // 
            // lblInfo
            // 
            this.lblInfo.Location = new System.Drawing.Point(96, 240);
            this.lblInfo.Size = new System.Drawing.Size(128, 20);
            // 
            // btnReadStop
            // 
            this.btnReadStop.Location = new System.Drawing.Point(120, 40);
            this.btnReadStop.Size = new System.Drawing.Size(88, 24);
            this.btnReadStop.Text = "停止读取";
            this.btnReadStop.Click += new System.EventHandler(this.btnReadStop_Click);
            // 
            // btnStartRead
            // 
            this.btnStartRead.Location = new System.Drawing.Point(16, 40);
            this.btnStartRead.Size = new System.Drawing.Size(88, 24);
            this.btnStartRead.Text = "开始读取";
            this.btnStartRead.Click += new System.EventHandler(this.btnStartRead_Click);
            // 
            // Form1
            // 
            this.ClientSize = new System.Drawing.Size(226, 268);
            this.Controls.Add(this.btnReadStop);
            this.Controls.Add(this.btnStartRead);
            this.Controls.Add(this.lblInfo);
            this.Controls.Add(this.btnClearText);
            this.Controls.Add(this.txtData);
            this.Controls.Add(this.btnStop);
            this.Controls.Add(this.btnStart);
            this.Text = "RFID示例";
            this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
            this.Load += new System.EventHandler(this.Form1_Load);
            this.KeyUp += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyUp);

        }
        #endregion

        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>

        static void Main() 
        {
            Application.Run(new Form1());
        }
        
        /// <summary>
        /// 打开服务
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnStart_Click(object sender, System.EventArgs e)
        {
            if (RFID.GetInstance().GetServerState())
            {
                StartEnable();
                lblInfo.Text = "RFID服务启动成功！";
                
            }
            else
            {
                if(RFID.GetInstance().Start())
                {
                    StartEnable();
                    lblInfo.Text = "RFID服务启动成功！";
                    MessageBox.Show("aaaa");
                }
                else
                {
                    StopEnable();
                    lblInfo.Text = "RFID服务启动失败！";
                }
            }
        }

        /// <summary>
        /// 关闭rfid服务
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnStop_Click(object sender, System.EventArgs e)
        {
            if (!RFID.GetInstance().GetServerState())
            {
                StopEnable();
                lblInfo.Text = "RFID服务关闭成功！";
            }
            else
            {
                if(RFID.GetInstance().Stop())
                {
                    StopEnable();
                    lblInfo.Text = "RFID服务关闭成功！";
                }
                else
                {
                    StartEnable();
                    lblInfo.Text = "RFID服务关闭失败！";
                }
            }
        }
    
        private void StartEnable()
        {
            btnStart.Enabled = false;
            btnStop.Enabled = true;
        }

        private void StopEnable()
        {
            btnStart.Enabled = true;
            btnStop.Enabled = false;
        }

        private void SetText()
        {
            string strBak = txtData.Text;
            if (strBak.Length < 1000)
            {
                txtData.Text = strText + strBak;
            }
            else
            {
                txtData.Text = strText;
            }
        }

        string strText = string.Empty;

        /// <summary>
        /// 接收读取到的rfid数据
        /// </summary>
        /// <param name="args"></param>
        public void OnDataArrived(MEC.Nurse.Provider.RFIDEventArgs args)
        {
            StringBuilder strData = new StringBuilder();
            strData.Append("State : ");
            strData.Append(args.StateCode);
            strData.Append("\r\nData  : ");
            strData.Append(args.Data);
            strData.Append("\r\n---------------------\r\n");

            ControlInvokeHandler action = new ControlInvokeHandler(SetText);
            MessageBox.Show(strData.ToString());
            txtData.Text = strData.ToString();
            this.Invoke(action);
        }

        private delegate void ControlInvokeHandler();

        protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
        {
            e.Cancel = true;
            btnStop_Click(null, null);
            this.Hide();

            base.OnClosing (e);
        }

        private void btnClearText_Click(object sender, System.EventArgs e)
        {
            txtData.Text = string.Empty;
        }

        /*
         * ReadStart和ReadEnd组合读取rfid 
         * 
         * 例如当手指按下按钮的时候ReadStart, 当手指离开按钮时ReadEnd
         * 这样模块就会自动执行一次读取
         * */

        /// <summary>
        /// 开始读取rfid数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnStartRead_Click(object sender, System.EventArgs e)
        {
            RFID.GetInstance().ReadStart();
            StartReadEnable();
        }

        /// <summary>
        /// 结束rfid数据读取
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnReadStop_Click(object sender, System.EventArgs e)
        {
            RFID.GetInstance().ReadEnd();
            StopReadEnable();
        }
        private void StartReadEnable()
        {
            btnStartRead.Enabled = false;
            btnReadStop.Enabled = true;
        }

        private void StopReadEnable()
        {
            btnStartRead.Enabled = true;
            btnReadStop.Enabled = false;
        }

        private void Form1_Load(object sender, System.EventArgs e)
        {
        
        }

        private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
        {
            this.Focus();
            if (e.KeyValue==122)
            {
                RFID.GetInstance().ReadStart();
                StartReadEnable();
            }
        }

        private void Form1_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
        {
            this.Focus();
            if (e.KeyValue==122)
            {
                RFID.GetInstance().ReadEnd();
                StopReadEnable();
            }
        }
    }
}