请兄弟们帮我分析下代码，经常会崩溃，郁闷啊

Question

代码可能有些长，请各位兄弟耐住性子看看，感激不尽：
using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using System.Configuration;
using System.Runtime.InteropServices;namespace 滁州移动服务评价系统
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        //引用dll部分
        #region
        Cls cls = new Cls();
        [DllImport("centerm_i70.dll", EntryPoint = "GetPasswordFromKeypad", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int GetPasswordFromKeypad(ref Cls.COMMPARAMETER stComParam, ref string strPassword, int nLen, int nMode, double nTimeout);
        [DllImport("centerm_i70.dll", EntryPoint = "SetEvaluatorInfo", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int SetEvaluatorInfo(ref Cls.COMMPARAMETER stComParam, string strDepartment, string strPosition, string strID, int nStar);
        [DllImport("centerm_i70.dll", EntryPoint = "GetEvaluationFromEvaluator", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int GetEvaluationFromEvaluator(ref Cls.COMMPARAMETER stComParam, ref string strEvaluation, int nEvaLen, ref string strReason, int nReaLen, int nTimeout);
        [DllImport("centerm_i70.dll", EntryPoint = "GetValueFromInfoviewer", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int GetValueFromInfoviewer(ref Cls.COMMPARAMETER stComParam, ref string strValue, int nVLen, int nTimeout);
        [DllImport("centerm_i70.dll", EntryPoint = "AppendToInfoviewer", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int AppendToInfoviewer(ref Cls.COMMPARAMETER stComParam, string strInfo, int nLen);
        [DllImport("centerm_i70.dll", EntryPoint = "ClearInfoviewer", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int ClearInfoviewer(ref Cls.COMMPARAMETER stComParam);
        [DllImport("centerm_i70.dll", EntryPoint = "EnableInfoviewer", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int EnableInfoviewer(ref Cls.COMMPARAMETER stComParam);
        [DllImport("centerm_i70.dll", EntryPoint = "SetInfoviewerText", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int SetInfoviewerText(ref Cls.COMMPARAMETER stComParam, int fontsize, string fontcolor, string backcolor);
        [DllImport("centerm_i70.dll", EntryPoint = "ListPictureBegin", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int ListPictureBegin(ref Cls.COMMPARAMETER stComParam, ref string listBuffer, ref int nSize, int nTimeout);
        [DllImport("centerm_i70.dll", EntryPoint = "ListPictureEnd", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int ListPictureEnd(string listBuffer);
        [DllImport("centerm_i70.dll", EntryPoint = "ListMP3AudioBegin", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int ListMP3AudioBegin(ref Cls.COMMPARAMETER stComParam, ref string listBuffer, ref int nSize, int nTimeout);
        [DllImport("centerm_i70.dll", EntryPoint = "ListMP3AudioEnd", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int ListMP3AudioEnd(string listBuffer);
        [DllImport("centerm_i70.dll", EntryPoint = "DownloadOperatorPicture", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int DownloadOperatorPicture(ref Cls.COMMPARAMETER stComParam, string strSrcFileName, string strDestFileName, int outtime);
        [DllImport("centerm_i70.dll", EntryPoint = "PlayMP3Audio", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int PlayMP3Audio(ref Cls.COMMPARAMETER stComParam, string strFileName);
        [DllImport(".\\centerm_i70.dll", EntryPoint = "isCommPortUsed", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int isCommPortUsed(); //检测端口是否被占用
        [DllImport(".\\centerm_i70.dll", EntryPoint = "ForceCloseCommPort", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int ForceCloseCommPort(ref Cls.COMMPARAMETER stComParam);//关闭当前端口
        [DllImport(".\\centerm_i70.dll", EntryPoint = "CloseApplication", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int CloseApplication(ref Cls.COMMPARAMETER stComParam); //关闭程序
        #endregion        //程序初始化
        public DataSet ds = null;
        public static string _tc = "";
        public static string _pj = "";
        public static string _pwd = "";
        public static int ppstate = 0;
        public static string loadhtml = "";
        public static string loadurl = "";
        private void Form1_Load(object sender, EventArgs e)
        {
            CSHLoad csh = new CSHLoad();
            csh.label1.Text = "系统正在初始化中，请稍后...";
            csh.ShowDialog();
            string _text = ConfigurationSettings.AppSettings["title"].ToString();
            string _pwdname = ConfigurationSettings.AppSettings["pwdname"].ToString();
            string _telname = ConfigurationSettings.AppSettings["telname"].ToString();
            string _submitname = ConfigurationSettings.AppSettings["submitname"].ToString();
            string _frmname = ConfigurationSettings.AppSettings["frmname"].ToString();
            Cls.bossurl = ConfigurationSettings.AppSettings["bossurl"].ToString();
            _tc = ConfigurationSettings.AppSettings["tc"].ToString();
            _pj = ConfigurationSettings.AppSettings["pj"].ToString();
            _pwd = ConfigurationSettings.AppSettings["pwd"].ToString();            this.Text = "滁州移动综合业务系统（版本：" + System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString() + "）";// _text;
            if (_pwdname != "" && _submitname != "")
            {
                Cls.submitname = _submitname;
                Cls.pwdname = _pwdname;
                Cls.telname = _telname;
                Cls.frmname = _frmname;
            }
            else
            { MessageBox.Show("程序初始化失败，请设置app.config文件"); }
            toolStripLabel1.Text = Cls.usercode;
        }        //检验加载是否完毕
        private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
        {
            timer1.Start();
        }

Answer 1

        //号码输入后触发事件，如欢迎问候语，计时开始，目标客户查询
        void telnum_LosingFocus(object sender, HtmlElementEventArgs e)
        {
            try
            {
                HtmlDocument hdoc = webBrowser1.Document.Window.Frames[Cls.frmname].Document;
                HtmlElement telnum = hdoc.All[Cls.telname];
                if (telnum != null)
                {
                    string tel = telnum.GetAttribute("value");
                    if (tel.Trim() != "" && tel.Length == 11 && tel != Cls.telstr)
                    {
                        Cls.telstr = tel;
                        Cls.statime = DateTime.Now;
                        ppstate = 1;
                        string orastr = ConfigurationSettings.AppSettings["ppsql"].ToString();
                        orastr = orastr.Replace("$hm$", tel.Trim());
                        string pjcode = cls.ExecuteNonQueryOra(orastr);
                        string mp3 = pptype(pjcode);
                        Thread play = new Thread(new ParameterizedThreadStart(playmp3));
                        play.Start(mp3);
                        if (_tc.ToLower() == "true")
                        {
                            selectdata.RunWorkerAsync(tel);
                        }
                    }
                }
            }
            catch(Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
                ppstate = 0;
            }
        }        private void selectdata_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            try
            {
                int k = (int)e.Result;
                if (k == 0)
                {
                    toolStripLabel1.Text = "   目标客户";
                    if (Cls.bosscode != "")
                    {
                        toolStripButton6.Visible = true;
                    }
                    toolStripLabel1.ForeColor = System.Drawing.Color.Red;
                    string stext = " 新业务推荐：\n";
                    for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                    {
                        stext += "    " + (i + 1).ToString() + ":" + ds.Tables[0].Rows[i][4].ToString() + "\n";
                    }
                    showtext.RunWorkerAsync(stext);
                }
                else
                {
                    toolStripLabel1.Text = "    非目标客户";
                    toolStripButton6.Visible = false;
                    toolStripLabel1.ForeColor = System.Drawing.Color.Black;
                }
            }
            catch ( Exception ee)
            { 
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
            }
        }
        private void selectdata_DoWork(object sender, DoWorkEventArgs e)
        {
            try
            {
                string hm = (string)e.Argument;
                int k = sltdt(hm);
                if (k > 0) { e.Result = 0; } else { e.Result = 1; }
            }
            catch(Exception ee) 
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
            }
        }
        private void showtext_DoWork(object sender, DoWorkEventArgs e)
        {
            try
            {
                string str = (string)e.Argument;
                Cls.COMMPARAMETER stCommParam;
                stCommParam.nPort = Cls._nport;
                stCommParam.nBaudRate = Cls._nBaudRate;
                stCommParam.nByteSize = Cls._nByteSize;
                stCommParam.nParity = Cls._nparity;
                stCommParam.nStopBits = Cls._nstopbits;
                safeport();
                string outovalue = "";
                EnableInfoviewer(ref stCommParam);
                SetInfoviewerText(ref stCommParam, 6, "FF0000", "FFFFFF");
                AppendToInfoviewer(ref stCommParam, str, 500);
                if (GetValueFromInfoviewer(ref stCommParam, ref outovalue, 16, 10) == 0)
                { 
                    e.Result = outovalue;
                    Thread.CurrentThread.Abort();
                }
                else
                { e.Result = 0; Thread.CurrentThread.Abort(); }
            }
            catch (Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
            }
        }        private void showtext_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            try
            {
                string k = e.Result.ToString();
                if (k != "0")
                {
                    if (k.ToUpper() == "B1F" && Cls.bosscode != "")
                    {
                        推荐 tj = new 推荐();
                        tj.Show(this);
                    }
                }
            }
            catch(Exception ee) 
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
            }
        }
        protected string pptype(string pj)
        {
            try
            {
                switch (pj)
                {
                    case "G00":
                        return "Hello_GoTone.mp3";
                    case "G30":
                        return "Hello_EasyOwn.mp3";
                    case "G40":
                        return "Hello_MZone.mp3";
                    default:
                        return "Hello_EasyOwn.mp3";
                }
            }
            catch (Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
                return ""; 
            }
        }

Answer 2

protected int sltdt(string tel)
        {
            try
            {
                string haoma = tel;
                string sql = "select hdid from tc_t_huodong where hdshow=0 and hdyxq>='" + DateTime.Today.ToShortDateString() + "' and hdarea in('00')";//,'" + Cls.deptcode + "'
                string sqls = "";
                SqlDataReader rs = cls.SqlDataReader(sql);
                while (rs.Read())
                {
                    string t_name = "tc_t_hm" + rs[0].ToString();
                    if (sqls == "")
                    {
                        sqls += "select haoma,state,date,hdid,hdname,hdinfo,hdyxq,hdorder,hdcode from " + t_name + " a left join tc_t_huodong b on b.hdid=" + rs[0].ToString() + " where haoma='" + haoma + "'";
                    }
                    else
                    {
                        sqls += " union select haoma,state,date,hdid,hdname,hdinfo,hdyxq,hdorder,hdcode from " + t_name + " a left join tc_t_huodong b on b.hdid=" + rs[0].ToString() + " where haoma='" + haoma + "'";
                    }
                }
                rs.Close();
                rs.Dispose();
                ds = cls.DataSet(sqls);
                int k = ds.Tables[0].Rows.Count;
                //ds.Dispose();
                return k;
            }
            catch(Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
                return -1; 
            }
        }
        //调用播放声音线程
        protected void playmp3(object mp)
        {
            try
            {
                string _mp3 = (string)mp;
                Cls.COMMPARAMETER stCommParam;
                stCommParam.nPort = Cls._nport;
                stCommParam.nBaudRate = Cls._nBaudRate;
                stCommParam.nByteSize = Cls._nByteSize;
                stCommParam.nParity = Cls._nparity;
                stCommParam.nStopBits = Cls._nstopbits;
                PlayMP3Audio(ref stCommParam, _mp3);
                Thread.CurrentThread.Abort();
            }
            catch(Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
            }        }        //密码输入功能
        void inputpwd2_Focusing(object sender, HtmlElementEventArgs e)
        {
            try
            {
                Cls.COMMPARAMETER stCommParam;
                stCommParam.nPort = Cls._nport;
                stCommParam.nBaudRate = Cls._nBaudRate;
                stCommParam.nByteSize = Cls._nByteSize;
                stCommParam.nParity = Cls._nparity;
                stCommParam.nStopBits = Cls._nstopbits;
                HtmlDocument hdoc = webBrowser1.Document.Window.Frames[Cls.frmname].Document;
                HtmlElement inputpwd = hdoc.All["password2"];
                string pwdstr = "";
                safeport();
                if (GetPasswordFromKeypad(ref stCommParam, ref pwdstr, 6, 2, 20) == 0)
                { 
                    inputpwd.SetAttribute("value", pwdstr);
                    Thread.CurrentThread.Abort();
                }
            }
            catch(Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
            }
        }        //密码输入功能
        void inputpwd1_Focusing(object sender, HtmlElementEventArgs e)
        {
            try
            {
                Cls.COMMPARAMETER stCommParam;
                stCommParam.nPort = Cls._nport;
                stCommParam.nBaudRate = Cls._nBaudRate;
                stCommParam.nByteSize = Cls._nByteSize;
                stCommParam.nParity = Cls._nparity;
                stCommParam.nStopBits = Cls._nstopbits;
                HtmlDocument hdoc = webBrowser1.Document.Window.Frames[Cls.frmname].Document;
                HtmlElement inputpwd = hdoc.All["password1"];
                string pwdstr = "";
                safeport();
                if (GetPasswordFromKeypad(ref stCommParam, ref pwdstr, 6, 2, 20) == 0)
                { 
                    inputpwd.SetAttribute("value", pwdstr);
                    Thread.CurrentThread.Abort();
                }
            }
            catch(Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
            }
        }        //密码输入功能
        void inputpwd_Focusing(object sender, HtmlElementEventArgs e)
        {
            try
            {
                Cls.COMMPARAMETER stCommParam;
                stCommParam.nPort = Cls._nport;
                stCommParam.nBaudRate = Cls._nBaudRate;
                stCommParam.nByteSize = Cls._nByteSize;
                stCommParam.nParity = Cls._nparity;
                stCommParam.nStopBits = Cls._nstopbits;
                HtmlDocument hdoc = webBrowser1.Document.Window.Frames[Cls.frmname].Document;
                HtmlElement inputpwd = hdoc.All["password"];
                string pwdstr = "";
                safeport();
                if (GetPasswordFromKeypad(ref stCommParam, ref pwdstr, 6, 2, 10) == 0)
                { 
                    inputpwd.SetAttribute("value", pwdstr);
                    Thread.CurrentThread.Abort();
                }
            }
            catch(Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
            }
        }        //服务评价
        void submit_Click(object sender, HtmlElementEventArgs e)
        {
            if (ppstate == 1)
            {            }
        }

Answer 3

//启动评价
        protected void playjj()
        {
            try
            {
                //MessageBox.Show("评价完毕");
                Cls.COMMPARAMETER stCommParam;
                stCommParam.nPort = Cls._nport;
                stCommParam.nBaudRate = Cls._nBaudRate;
                stCommParam.nByteSize = Cls._nByteSize;
                stCommParam.nParity = Cls._nparity;
                stCommParam.nStopBits = Cls._nstopbits;
                safeport();
                string strEvaluation = "";
                string strReason = "";
                if (SetEvaluatorInfo(ref stCommParam, Cls.sitename, Cls.userpos, Cls.usercode, Cls.userstar) == 0)
                {
                    if (GetEvaluationFromEvaluator(ref stCommParam, ref strEvaluation, 16, ref strReason, 16, 15) == 0)
                    {
                        Cls.endtime = DateTime.Now;
                        string sql = "insert into pj_t_log" + DateTime.Today.Year.ToString() + "(cltel,pjuser,pjcont,pjreason,pjtime,statime,endtime,ywys,ywname)values";
                        sql += "('" + Cls.telstr + "','" + Cls.usercode + "','" + strEvaluation + "','" + strReason + "','" + DateTime.Now + "','" + Cls.statime + "','" + Cls.endtime + "'," + difftime(Cls.statime, Cls.endtime) + ",'')";
                        cls.ExecuteNonQuery(sql);
                        if (strEvaluation == "B3F" && Cls.telstr != "" && Cls.telstr.Trim().Length == 11)
                        {
                            string smssql = "insert into df_duanxin(zangtai,haoma,neirong)values(0,'" + Cls.telstr + "','工号：" + Cls.usercode + " 被客户评为不满意，原因是" + ppreason(strReason) + "!')";
                            cls.ExecuteNonQuery(smssql);
                        }
                    }
                }
                ppstate = 0;
            }
            catch(Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
                ppstate = 0; 
            }
            finally
            {
                Thread.CurrentThread.Abort();
            }
        }        //返回不满意的原因
        protected string ppreason(string cd)
        {
            try
            {
                switch (cd)
                {
                    case "BAF":
                        return "态度不好";
                    case "BBF":
                        return "业务不熟";
                    case "BCF":
                        return "效率不高";
                    case "BDF":
                        return "其他";
                    default:
                        return "";
                }
            }
            catch(Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
                return "";
            }        }        //时间间隔，单位分钟
        public int difftime(DateTime dt1, DateTime dt2)
        {
            try
            {
                TimeSpan ds = dt2.Subtract(dt1);
                return ds.Minutes;
            }
            catch (Exception ee)
            {
                string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                cls.log(errtext);
                return 0;
            }
        }        //系统登录
        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            login dl = new login();
            dl.ShowDialog(this);
        }        //代开BOSS网址
        private void toolStripButton5_Click(object sender, EventArgs e)
        {
            this.webBrowser1.Navigate(Cls.bossurl);        }
        //系统设置
        private void toolStripButton4_Click(object sender, EventArgs e)
        {
            sysset ss = new sysset();
            ss.Show();
        }        private void toolStripButton3_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("确定要关闭此窗口", "提示信息", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)
            {
                this.Dispose();
                Application.Exit();
            }
        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (MessageBox.Show("确定要关闭此窗口", "提示信息", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                this.Dispose();
                Application.Exit();
            }
            else
            { e.Cancel = true; }
        }        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            MessageBox.Show("此功能正在开发中");
        }        private void timer1_Tick(object sender, EventArgs e)
        {
            if (webBrowser1.ReadyState == WebBrowserReadyState.Complete && webBrowser1.IsBusy == false)
            {
                try
                {
                    timer1.Stop();
                    loadurl = "";
                    loadhtml = "";
                    HtmlDocument hdoc = webBrowser1.Document.Window.Frames[Cls.frmname].Document;
                    HtmlElement submit = hdoc.All[Cls.submitname];
                    HtmlElement qd1 = hdoc.All["yesBtn"];
                    HtmlElement rk = hdoc.All["btnSave"];
                    HtmlElement qd2 = hdoc.All["save"];
                    HtmlElement tj = hdoc.All["btnSubmit"];
                    string value = ConfigurationSettings.AppSettings["valuename"].ToString();
                    HtmlElement inputpwd = hdoc.All["password"];
                    HtmlElement inputpwd1 = hdoc.All["password1"];
                    HtmlElement inputpwd2 = hdoc.All["password2"];
                    HtmlElement telnum = hdoc.All[Cls.telname];                    if (qd1 != null && qd1.GetAttribute("value") == "确定")
                    { qd1.Click += new HtmlElementEventHandler(qd1_Click); }
                    else if (qd2 != null && qd2.GetAttribute("value") == "确定")
                    { qd2.Click += new HtmlElementEventHandler(qd2_Click); }
                    else if (rk != null && rk.GetAttribute("value") == "入库(C)")
                    { rk.Click += new HtmlElementEventHandler(rk_Click); }
                    else if (rk != null && rk.GetAttribute("value") == "入库")
                    { rk.Click += new HtmlElementEventHandler(rk_Click); }
                    else if (tj != null && tj.GetAttribute("value") == "提交")
                    { tj.Click += new HtmlElementEventHandler(tj_Click); }                    if (inputpwd != null && _pwd.ToLower() == "true")
                    {
                        inputpwd.Focusing += new HtmlElementEventHandler(inputpwd_Focusing);
                    }
                    if (inputpwd1 != null && _pwd.ToLower() == "true")
                    { inputpwd1.Focusing += new HtmlElementEventHandler(inputpwd1_Focusing); }                    if (inputpwd2 != null && _pwd.ToLower() == "true")
                    { inputpwd2.Focusing += new HtmlElementEventHandler(inputpwd2_Focusing); }                    if (telnum != null)
                    {
                        telnum.LosingFocus += new HtmlElementEventHandler(telnum_LosingFocus);
                    }
                }
                catch (Exception ee)
                {
                    string errtext = DateTime.Now.ToString() + "        错误：" + ee.Message;
                    cls.log(errtext);
                }            }
            else
            {
                loadhtml = webBrowser1.DocumentText;
                loadurl = webBrowser1.Url.ToString();
            }
        }        void tj_Click(object sender, HtmlElementEventArgs e)
        {
            if (ppstate == 1)
            {
                Thread qdpj = new Thread(new ThreadStart(playjj));
                qdpj.Start();
            }        }        void rk_Click(object sender, HtmlElementEventArgs e)
        {
            Thread qdpj = new Thread(new ThreadStart(playjj));
            qdpj.Start();
        }        void qd2_Click(object sender, HtmlElementEventArgs e)
        {
            if (ppstate == 1)
            {
                Thread qdpj = new Thread(new ThreadStart(playjj));
                qdpj.Start();
            }
        }        void qd1_Click(object sender, HtmlElementEventArgs e)
        {
            if (ppstate == 1)
            {
                Thread qdpj = new Thread(new ThreadStart(playjj));
                qdpj.Start();
            }
        }        private void timer2_Tick(object sender, EventArgs e)
        {        }        private void toolStripButton6_Click(object sender, EventArgs e)
        {
            推荐 tj = new 推荐();
            tj.Show(this);
        }        /// <summary>
        /// 关闭程序和端口
        /// </summary>
        private void safeport()
        {
            if (isCommPortUsed() != 0)
            {
                Cls.COMMPARAMETER stCommParam;
                stCommParam.nPort = Cls._nport;
                stCommParam.nBaudRate = Cls._nBaudRate;
                stCommParam.nByteSize = Cls._nByteSize;
                stCommParam.nParity = Cls._nparity;
                stCommParam.nStopBits = Cls._nstopbits;
                CloseApplication(ref stCommParam);
                ForceCloseCommPort(ref stCommParam);
                Thread.Sleep(1000);
            }
        }
    }
}

Answer 4

其中一些cls中使用的代码只是一些兑取数据库和字符出来的东东，对代码没有什么影响，大家看看几个线程的使用上有没有什么问题，这个代码安装在2003服务器上，然后很一些人在远程通过终端（相当一个pc）登陆2003的用户，并同时使用这个程序，我在我开发的台式机和笨笨上都没有任何的问题，就是在那个服务器上有问题。经常会崩溃。

Answer 5

代码没有排版，很难检查，建议如下操作：
1、服务器端捕捉异常，加 try...catch... finally 或用 windbg 跟进检查；
2、查看服务器系统日志，看是否能有其他收获。ps: ApplicationSettings 最好加上 try...catch ，原因： web.config 或 App.config 中可能泄漏节点

Answer 6

有谁会为了回答一个问题，去努力看懂这长的代码？那真的是要佩服他的热情、耐心和水平了。我觉得我们在这里提问题，应该自己要反复推敲一下自己的问题，把自己的问题浓缩成一个模型，这样得到满意答案的几率会大大提高。这样不管三七二十一把自己出问题的代码拷贝上来一大片，肯定是解决不了问题的。友情提示一下而已！
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Answer 7

你说的很有道理，我也这样提过问题，得到的答案就是仔细检查你的代码，可定哪有有问题，或让我加上try cacth ，很多还说没有代码无法帮分析，我也知道这么长的代码很难看，没有办法啊。
提供个代码，只供分析用，谢谢楼上的兄弟热情提示。