Question

我有一个按钮代码，只要用户点击它就可以连接到网络。

private void cmdConnect_Click(object sender, System.EventArgs e)
    {
        try
        {
            EnableCommands(true);
            //Creating instance of Socket
            m_socClient = new Socket (AddressFamily.InterNetwork,SocketType.Stream ,ProtocolType.Tcp );

            // retrieve the remote machines IP address
            IPAddress ip = IPAddress.Parse (txtIPAddr.Text);
            //A printer has open port 9100 which can be used to connect to printer
            int iPortNo = System.Convert.ToInt16 ( txtPort.Text);
            //create the end point 
            IPEndPoint ipEnd = new IPEndPoint (ip.Address,iPortNo);
            //connect to the remote host
            m_socClient.Connect ( ipEnd );
            EnableCommands(false);
            //wait for data to arrive 
            WaitForData();
        }
        catch(SocketException se)
        {
            MessageBox.Show (se.Message );
            EnableCommands(true);
        }

        page_counter();
    }

但是现在我希望此代码在没有任何人点击的情况下自动运行。我想这样做是因为我希望任务调度程序每天运行此代码来进行更新。这个程序将在后面运行，并且没有与用户交互。因此，我希望这个程序自动连接。这可能吗？请指教。

Answer 1

您可以将此代码放在方法中而不是按钮单击，并从按钮单击事件调用该方法，也可以在InitializeComponent（）之后从Form的构造函数调用该方法。

public partial class Sample : Form
    {
        public Sample()
        {
            InitializeComponent();
            CmdConnect(txtIPAddr.Text, txtPort.Text);
        }

        private void cmdConnect_Click(object sender, System.EventArgs e)
        {
            CmdConnect(txtIPAddr.Text, txtPort.Text);
        }

        private void CmdConnect(string txtIPAddr, string txtPort)
        {
            try
            {
                EnableCommands(true);
                //Creating instance of Socket
                m_socClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

                // retrieve the remote machines IP address
                IPAddress ip = IPAddress.Parse(txtIPAddr);
                //A printer has open port 9100 which can be used to connect to printer
                int iPortNo = System.Convert.ToInt16(txtPort);
                //create the end point 
                IPEndPoint ipEnd = new IPEndPoint(ip.Address, iPortNo);
                //connect to the remote host
                m_socClient.Connect(ipEnd);
                EnableCommands(false);
                //wait for data to arrive 
                WaitForData();
            }
            catch (SocketException se)
            {
                MessageBox.Show(se.Message);
                EnableCommands(true);
            }
            page_counter();
        }

// Other Methods
}

Answer 2

在构造函数中调用cmdConnect_Click(null, null)或者首先运行它的位置。

Answer 3

您可以通过在FormLoad（）事件上调用PerformClick()来提升按钮控件的单击事件。因此，它会自动运行，无需任何人点击它或Task Scheduler运行您的应用程序进行更新。

cmdConnect.PerformClick();

但我认为发送点击事件是最好的方式。

如果您只想从表单中的其他位置运行try块中的代码，请将代码放入单独的方法（如DoWork()）中，并从需要使用它的任何位置调用该方法。这样你就可以访问该功能了。

实施例

private void NetworkConnection()
{
    try
    {
        EnableCommands(true);
        //Creating instance of Socket
        m_socClient = new Socket (AddressFamily.InterNetwork,SocketType.Stream ,ProtocolType.Tcp );

        // retrieve the remote machines IP address
        IPAddress ip = IPAddress.Parse (txtIPAddr.Text);
        //A printer has open port 9100 which can be used to connect to printer
        int iPortNo = System.Convert.ToInt16 ( txtPort.Text);
        //create the end point 
        IPEndPoint ipEnd = new IPEndPoint (ip.Address,iPortNo);
        //connect to the remote host
        m_socClient.Connect ( ipEnd );
        EnableCommands(false);
        //wait for data to arrive 
        WaitForData();
    }
    catch(SocketException se)
    {
        MessageBox.Show (se.Message );
        EnableCommands(true);
    }

    page_counter();
}

在按钮点击事件中，只需调用NetworkConnection()方法：

private void cmdConnect_Click(object sender, System.EventArgs e)
{
    NetworkConnection();
}

winform中的自动点击按钮c＃

3 个答案:

实施例