具有多个计时器的WinForm

我正在编写一个WinForm应用程序，以每30秒或1分钟使用SNMP调用。

我有一个计时器用于调用我的 SNMP 命令，但我想添加一个显示操作期间经过的总时间的 texbox 计数器。

我遇到了很多问题，所以这里有一个列表：

1. 我希望我的 SNMP 计时器"计时器"在等待分配的时间之前执行一次，所以我让它在 3 秒时关闭，然后在处理程序中更改间隔。但这有时会使计时器多次响起，这不是我想要的。
每次"计时器">
2. 关闭并且我的SNMP调用执行我的计数器计时器"appTimer"变得不同步。我尝试了一个解决方法，检查它是否在另一个处理程序中，然后将计时器跳转到适当的时间。这行得通，但我觉得这让它变得太复杂了。
3. 我知道的最后一个问题发生在我使用停止按钮停止应用程序时，该按钮没有完全退出应用程序。当我开始另一次运行时，两个计时器之间的时间变得更长，由于某种原因，我的计数计时器"appTimer"开始计数速度是原来的两倍。

我希望这个描述不会太混乱，但无论如何这是我的代码：

using System;
using System.Net;
using SnmpSharpNet;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public static bool stop = false;
        static bool min = true, eye = false, firstTick = false;
        static string ipAdd = "", fileSaveLocation = "";
        static System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer();
        static System.Windows.Forms.Timer appTimer = new System.Windows.Forms.Timer();
        static int alarmCounter = 1, hours = 0, minutes = 0, seconds = 0, tenthseconds = 0, count = 0;
        static bool inSNMP = false;
        static TextBox textbox, timeTextbox;
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            textbox = outputBox;
            timeTextbox = timeBox;
            ipAdd = "192.168.98.107";
            fileSaveLocation = "c:/Users/bshellnut/Desktop/Eye.txt";
            min = true;
            inSNMP = false;
        }
        private void IPtext_TextChanged(object sender, EventArgs e)
        {
            ipAdd = IPtext.Text;
        }
        private void stopButton_Click(object sender, EventArgs e)
        {
            stop = true;
            timer.Stop();
            appTimer.Stop();
            count = 0;
            hours = minutes = seconds = tenthseconds = 0;
            inSNMP = false;
        }
        // This is the method to run when the timer is raised.
        private static void TimerEventProcessor(Object myObject,
                                                EventArgs myEventArgs)
        {
            inSNMP = true;
            timer.Stop();
            if (firstTick == true)
            {
                // Sets the timer interval to 60 seconds or 1 second.
                if (min == true)
                {
                    timer.Interval = 1000 * 60;
                }
                else
                {
                    timer.Interval = 1000 * 30;
                }
            }
            // Displays a message box asking whether to continue running the timer.
            if (stop == false)
            {
                textbox.Clear();
                // Restarts the timer and increments the counter.
                alarmCounter += 1;
                timer.Enabled = true;
                System.IO.StreamWriter file;
                //if (eye == true)
                //{
                    file = new System.IO.StreamWriter(fileSaveLocation, true);
                /*}
                else
                {
                    file = new System.IO.StreamWriter(fileSaveLocation, true);
                }*/
                // SNMP community name
                OctetString community = new OctetString("public");
                // Define agent parameters class
                AgentParameters param = new AgentParameters(community);
                // Set SNMP version to 2 (GET-BULK only works with SNMP ver 2 and 3)
                param.Version = SnmpVersion.Ver2;
                // Construct the agent address object
                // IpAddress class is easy to use here because
                //  it will try to resolve constructor parameter if it doesn't
                //  parse to an IP address
                IpAddress agent = new IpAddress(ipAdd);
                // Construct target
                UdpTarget target = new UdpTarget((IPAddress)agent, 161, 2000, 1);
                // Define Oid that is the root of the MIB
                //  tree you wish to retrieve
                Oid rootOid;
                if (eye == true)
                {
                    rootOid = new Oid("1.3.6.1.4.1.128.5.2.10.14"); // ifDescr
                }
                else
                {
                    rootOid = new Oid("1.3.6.1.4.1.128.5.2.10.15");
                }
                // This Oid represents last Oid returned by
                //  the SNMP agent
                Oid lastOid = (Oid)rootOid.Clone();
                // Pdu class used for all requests
                Pdu pdu = new Pdu(PduType.GetBulk);
                // In this example, set NonRepeaters value to 0
                pdu.NonRepeaters = 0;
                // MaxRepetitions tells the agent how many Oid/Value pairs to return
                // in the response.
                pdu.MaxRepetitions = 5;
                // Loop through results
                while (lastOid != null)
                {
                    // When Pdu class is first constructed, RequestId is set to 0
                    // and during encoding id will be set to the random value
                    // for subsequent requests, id will be set to a value that
                    // needs to be incremented to have unique request ids for each
                    // packet
                    if (pdu.RequestId != 0)
                    {
                        pdu.RequestId += 1;
                    }
                    // Clear Oids from the Pdu class.
                    pdu.VbList.Clear();
                    // Initialize request PDU with the last retrieved Oid
                    pdu.VbList.Add(lastOid);
                    // Make SNMP request
                    SnmpV2Packet result;
                    try
                    {
                        result = (SnmpV2Packet)target.Request(pdu, param);
                    }
                    catch (SnmpSharpNet.SnmpException)
                    { 
                        timer.Stop();
                        textbox.Text = "Could not connect to the IP Provided.";
                        break;
                    }
                    // You should catch exceptions in the Request if using in real application.
                    // If result is null then agent didn't reply or we couldn't parse the reply.
                    if (result != null)
                    {
                        // ErrorStatus other then 0 is an error returned by 
                        // the Agent - see SnmpConstants for error definitions
                        if (result.Pdu.ErrorStatus != 0)
                        {
                            // agent reported an error with the request
                            textbox.Text = "Error in SNMP reply. " + "Error " + result.Pdu.ErrorStatus + " index " + result.Pdu.ErrorIndex;
                            lastOid = null;
                            break;
                        }
                        else
                        {
                            // Walk through returned variable bindings
                            foreach (Vb v in result.Pdu.VbList)
                            {
                                // Check that retrieved Oid is "child" of the root OID
                                if (rootOid.IsRootOf(v.Oid))
                                {
                                    count++;
                                    textbox.Text += "#" + count + " " + v.Oid.ToString() + " " + SnmpConstants.GetTypeName(v.Value.Type) +
                                                   " " + v.Value.ToString() + Environment.NewLine;
                                    file.WriteLine("#" + count + ", " + v.Oid.ToString() + ", " + SnmpConstants.GetTypeName(v.Value.Type) +
                                                   ", " + v.Value.ToString(), true);
                                    if (v.Value.Type == SnmpConstants.SMI_ENDOFMIBVIEW)
                                        lastOid = null;
                                    else
                                        lastOid = v.Oid;
                                }
                                else
                                {
                                    // we have reached the end of the requested
                                    // MIB tree. Set lastOid to null and exit loop
                                    lastOid = null;
                                }
                            }
                        }
                    }
                    else
                    {
                        //Console.WriteLine("No response received from SNMP agent.");
                        textbox.Text = "No response received from SNMP agent.";
                        //outputBox.Text = "No response received from SNMP agent.";
                    }
                }
                target.Close();
                file.Close();
            }
            else
            {
                // Stops the timer.
                //exitFlag = true;
                count = 0;
            }
        }
        private static void ApplicationTimerEventProcessor(Object myObject,
                                                EventArgs myEventArgs)
        {
            tenthseconds += 1;
            if (tenthseconds == 10)
            {
                seconds += 1;
                tenthseconds = 0;
            }
            if (inSNMP && !firstTick)
            {
                if (min)
                {
                    seconds = 60;
                }
                else
                {
                    textbox.Text += "IN 30 SECONDS!!!";
                    if (seconds < 30)
                    {
                        seconds = 30;
                    }
                    else
                    {
                        seconds = 60;
                    }
                }
            }
            if(seconds == 60)
            {
                seconds = 0;
                minutes += 1;
            }
            if(minutes == 60)
            {
                minutes = 0;
                hours += 1;
            }
            timeTextbox.Text = (hours < 10 ? "00" + hours.ToString() : hours.ToString()) + ":" + 
                               (minutes < 10 ? "0" + minutes.ToString() : minutes.ToString()) + ":" +
                               (seconds < 10 ? "0" + seconds.ToString() : seconds.ToString()) + "." +
                               (tenthseconds < 10 ? "0" + tenthseconds.ToString() : tenthseconds.ToString());
            inSNMP = false;
            firstTick = false;
        }
        private void eyeButton_Click(object sender, EventArgs e)
        {
            outputBox.Text = "Connecting...";
            eye = true;
            stop = false;
            count = 0;
            hours = minutes = seconds = tenthseconds = 0;
            timer.Tick += new EventHandler(TimerEventProcessor);
            timer.Interval = 3000;
            firstTick = true;
            appTimer.Tick += new EventHandler(ApplicationTimerEventProcessor);
            appTimer.Interval = 100;
            appTimer.Start();
            timer.Start();
        }
        private void jitterButton_Click(object sender, EventArgs e)
        {
            outputBox.Text = "Connecting...";
            eye = false;
            stop = false;
            count = 0;
            hours = minutes = seconds = tenthseconds = 0;
            timer.Tick += new EventHandler(TimerEventProcessor);
            timer.Interval = 3000;
            firstTick = true;
            appTimer.Tick += new EventHandler(ApplicationTimerEventProcessor);
            appTimer.Interval = 100;
            appTimer.Start();
            timer.Start();
        }
        private void Seconds_CheckedChanged(object sender, EventArgs e)
        {
            min = false;
        }
        private void Minutes_CheckedChanged(object sender, EventArgs e)
        {
            min = true;
        }
        private void exitButton_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
        private void savetextBox_TextChanged(object sender, EventArgs e)
        {
            fileSaveLocation = savetextBox.Text;
        }
    }
}

using System;
using System.Drawing;
using System.Windows.Forms;
class Form1 : Form
{
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new Form1());
    }
    DateTime lastSnmpTime;
    TimeSpan snmpTime = TimeSpan.FromSeconds(30);
    DateTime startTime;
    TextBox elapsedTimeTextBox;
    Timer timer;
    public Form1()
    {
        timer = new Timer { Enabled = false, Interval = 10 };
        timer.Tick += new EventHandler(timer_Tick);
        elapsedTimeTextBox = new TextBox { Location = new Point(10, 10), ReadOnly = true };
        Controls.Add(elapsedTimeTextBox);
    }
    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
        startTime = DateTime.Now;
        timer.Start();
    }
    void timer_Tick(object sender, EventArgs e)
    {
        // Update elapsed time
        elapsedTimeTextBox.Text = (DateTime.Now - startTime).ToString("g");
        // Send SNMP
        if (DateTime.Now - lastSnmpTime >= snmpTime)
        {
            lastSnmpTime = DateTime.Now;
            // Do SNMP
            // Adjust snmpTime as needed
        }
    }
}