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某些内容时,这将触发。所以,我可以读取socket上的数据。
我在另一个项目中使用过这个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并在主项目中(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<MyEventArgs> 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
公共类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永远不会发生。 谢谢你的帮助...
答案 0 :(得分:5)
你在这里写的是一个事件发生时调用的事件处理程序。必须有一个包含此事件处理程序的类。不是编写全局响应变量,而是声明并调用另一个事件,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;
}
}
}
来自来电者,你可以这样使用它:
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,您需要将<TheClassInDLL>
和<TheCallingClassOutsideDLL>
替换为真实的班级名称!创建其他课程当然不起作用!
答案 1 :(得分:0)
为此,您必须定义自己的事件并在需要时提升它... 例如 - &gt;在您设置“响应”变量的类中定义一个事件
//your custom event
public event EventHandler<CustomEventArgs> MyCustomEvent;
//This will raise your event and notify all who registered
private void RaiseMyCustomEvent(CustomEventArgs e)
{
var handler = MyCustomEvent;
if (handler != null)
{
handler(this, e);
}
}
也许你还需要CustomEventArgs(在上面的例子中使用)
public class CustomEventArgs : EventArgs
{
public String Message {get;private set;}
public CustomEventArgs(String message){
this.Message = message;
}
}
使用dll并希望收到通知的类需要注册此事件
YourDllClassInstance.MyCustomEvent += OnMyCustomEvent;
public void OnMyCustomEvent(object sender, CustomEventArgs e){
Console.WriteLine("Event received");
}
这意味着在您的dll课程中,当您想要举起活动时,您必须执行以下操作
response = "blablabla";
RaiseMyCustomEvent(new CustomEventArgs(response);
这就是你要求的吗?