问

如何知道dll事件何时被触发

风行汽车-赣州景通4S店发布于 2023-01-01 18:26

dll

我创建了一个包含此事件处理程序的DLL:

public void tcp1_Data(object sender, Sockets.DataEventArgs e)
{
  Tcp tcp = (Tcp)sender;

  response = "Socket Connection" + tcp.Tag.ToString() + " replied : " + e.Data.ToString();

  tcp.Close();
}

当服务器在套接字连接中写入一些东西时,这将触发所以,通过这个,我可以读取socket上的数据.

我在另一个项目中使用了这个dll.我想在我的项目(使用dll)中知道服务器在套接字连接上写入数据的确切时间.正如你在tcp1_Data事件中看到的那样,我将结果设置为响应变量,在主项目中(使用了dll),我检查了这个变量polling(如果响应不为null,则表示此事件被触发).但它不是我想要的.我不想一直检查这个变量.

还有其他方法吗？

我试过这个,因为@ThorstenDittmar说:

我的dll项目(名称为ClientSample)包含:

TheClassInDLL Class

public class TheClassInDLL
{

    public event EventHandler DataEventCalled;

    public void tcp1_Data(object sender, Sockets.DataEventArgs e)
    {
        Tcp tcp = (Tcp)sender;

        // Note: LOCAL variable
        string myresponse = "Socket Connection" + tcp.Tag.ToString() + " replied : " + e.Data.ToString();

        // Call the new event here
        if (DataEventCalled != null)
            DataEventCalled(this, new MyEventArgs(myresponse));

        tcp.Close();
    }

    // We use this class to pass arguments to the event handler
    public class MyEventArgs : EventArgs
    {
        public MyEventArgs(string response)
        {
            this.Response = response;
        }

        public string Response
        {
            get;
            private set;
        }
    }
}

TCPSample class

public class TCPSample {Tcp tcp = new Tcp(); tcp.Data + = new System.EventHandler

在我上面使用的另一个项目中:

public partial class Form1 : Form
{
    private TheClassInDLL myClass;
    ClientSample.TCPSample t = new ClientSample.TCPSample();

    public Form1()
    {
        InitializeComponent();

        myClass = new TheClassInDLL();
        myClass.DataEventCalled += DataEvent;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        t.newTCP();
    }

    private void DataEvent(object sender, TheClassInDLL.MyEventArgs e)
    {
        MessageBox.Show(e.Response);
    }

}

但它没有用,DataEvent从未发生过.谢谢你的帮助......

1 个回答

你在这里写的是一个事件处理程序,当事情发生时调用.必须有一个包含此事件处理程序的类.声明并调用另一个事件而不是编写全局响应变量,您可以从该类外部订阅,如下所示:

public class <TheClassInDLL>
{
    public event EventHandler<MyEventArgs> DataEventCalled;

    // SNIP: All the other code that leads to tcp1_Data being called
    ...

    // The event handler that's called by some code in the class
    public void tcp1_Data(object sender, Dart.Sockets.DataEventArgs e)
    {
        Tcp tcp = (Tcp)sender;

        // Note: LOCAL variable
        string myresponse = "Socket Connection" + tcp.Tag.ToString() + " replied : " + e.Data.ToString();

        // Call the new event here
        if (DataEventCalled != null)
            DataEventCalled(this, new MyEventArgs(myresponse));

        tcp.Close();
    }

    // We use this class to pass arguments to the event handler
    public class MyEventArgs : EventArgs
    {
        public MyEventArgs(string response)
        {
            this.Response = response;
        }

        public string Response
        {
            get;
            private set;
        }
    }
}

来自调用者,您可以像这样使用它:

public class <TheCallingClassOutsideDLL>
{
    private <TheClassInDLL> myClass;

    public TheCallingClassOutsideDLL()
    {
        myClass = new TheClassInDLL();
        myClass.DataEventCalled += DataEvent;
    }

    private void DataEvent(object sender, <TheClassInDLL>.MyEventArgs e)
    {
        Console.WriteLine(e.Response);
    }
}

当然,你需要更换<TheClassInDLL>,并<TheCallingClassOutsideDLL>与真实的类名!创建其他课程当然不起作用!

2023-01-01 18:27 回答

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