Question

我对编程还很陌生，并且不确定我是否以正确的方式进行操作。

我已经在主窗体上创建了一个按钮，该按钮调用一个单独的类并将返回值附加到richtextbox。另一个类对计算机执行ping操作，并（显然）返回我想要的文本。

   ---Here is the main form and the button within it--


    public void Btn_Ping_Click_1(object sender, EventArgs e)
    {
        Class1 pingClass = new Class1();

        if (Btn_Ping.Text == "Ping")
        {
            Btn_Ping.Text = "Stop Ping";
        }
        else if (Btn_Ping.Text == "Stop Ping")
        {
            Btn_Ping.Text = "Ping";
        }
        while (Btn_Ping.Text == "Stop Ping")
        {
            richTextBox1.AppendText(pingClass.PingHost(Txt_Main.Text));
        }
    }



 ---Here is the seperate class that pings the machine and returns text--



namespace HelpDeskTools.Service.Classes
{
   class Class1
{
    HelpdeskTools_MainInterface mainForm = new HelpdeskTools_MainInterface();

    public string PingHost(string host)
    {
        //string to hold our return messge
        string returnMessage = string.Empty;

        //IPAddress instance for holding the returned host
        var address = Dns.GetHostEntry(host).AddressList.First();

        //set the ping options, TTL 128
        PingOptions pingOptions = new PingOptions(128, true);

        //create a new ping instance
        Ping ping = new Ping();

        //32 byte buffer (create empty)
        byte[] buffer = new byte[32];

        var HasConnection = NetworkInterface.GetIsNetworkAvailable();

        //first make sure we actually have an internet connection
        if (HasConnection)
        {

                try
                {
                    //send the ping 4 times to the host and record the returned data.
                    //The Send() method expects 3 items:
                    //1) The IPAddress we are pinging
                    //2) The timeout value
                    //3) A buffer (our byte array)
                    PingReply pingReply = ping.Send(address, 1000, buffer, pingOptions);

                    //make sure we dont have a null reply
                    if (!(pingReply == null))
                    {
                        switch (pingReply.Status)
                        {
                            case IPStatus.Success:
                                returnMessage = string.Format("Reply from host: bytes={0} Response Time={1}ms ", pingReply.Buffer.Length, pingReply.RoundtripTime);
                                break;
                            case IPStatus.TimedOut:
                                returnMessage = "Connection has timed out...";
                                break;
                            default:
                                returnMessage = string.Format("Ping failed: {0}", pingReply.Status.ToString());
                                break;
                        }
                    }
                    else
                        returnMessage = "Connection failed for an unknown reason...";
                }
                catch (PingException ex)
                {
                    returnMessage = string.Format("Connection Error: {0}", ex.Message);
                }
                catch (SocketException ex)
                {
                    returnMessage = string.Format("Connection Error: {0}", ex.Message);
                }

        }
        else
            returnMessage = "No Internet connection found...";

        //return the message
        return returnMessage;
    } } }

我的代码的主要问题是，while循环以主形式无限运行（它确实正确地附加了文本），但是冻结了程序（我希望能够再次按下按钮并停止while循环） -我意识到我尚未编写逻辑来停止while循环，因为它会立即冻结程序，因此我需要解决第一个问题。我也不知道最好的方法。

是否有更好的方法在类中运行while循环，而不是返回字符串，而是将文本实际附加到类中的richtextbox1中（甚至可能吗？）现在，它一遍又一遍地调用函数，对我来说，这似乎是错误的。

还是我这样做正确，但是需要以某种方式将函数调用分成不同的进程？（我不知道如何）。

Answer 1

您必须使用async和await在另一个线程中运行循环-> https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/async/

对于您的标签，您可以尝试--How do I update the GUI from another thread?

希望有帮助

如何将文本附加到单独类的文本框形式中？

1 个答案: