我正在试图利用我正在尝试开发的事件方面的插件体系结构。我可以在单个应用程序中做到这一点:(显然,这是我试图完成的一个非常简化的版本,如果这是我的代码,有更简单的方法来完成此操作,只需遵循逻辑;)在插件体系结构中激发事件与单个应用程序
public Form1()
{
public event EventHandler OnValueOver5Chars;
Main()
{
OnValueOver5Chars+= new EventHandler(WarnUser);
....
}
private void textBox_Changed(object sender, EventArgs e)
{
if(sender.Text.count() > 5)
OnValueOver5Chars(sender, e); // WORKS HERE
}
private void WarnUser(object sender, EventArgs e)
{
...
}
}
不过,现在我有一个插件架构,其中插件实现里面有我的事件的接口:
// Interface.cs
public interface IPlugin
{
event EventHandler OnValueOver5Chars;
...
}
// Plugin1.cs
public class Plugin1 : IPlugin
{
public event EventHandler OnValueOver5Chars;
Plugin1()
{
OnValueOver5Chars += new EventHandler(Plugin1WarnUser);
}
private void Plugin1WarnUser(object sender, EventArgs e)
{
...
}
}
// Form.cs
public class Form1 : Form
{
public Form1()
{
Assembly SampleAssembly = Assembly.LoadFrom("Plugin1.dll");
Type myType = SampleAssembly.GetTypes()[0];
if (myType.GetInterfaces().Contains(typeof(IPlugin)))
{
IPlugin myInstance = Activator.CreateInstance(myType) as IPlugin;
myInstance.OnValueOver5Chars(this, new EventArgs());
// Compiler Error CS0079 - The event 'event' can only appear on the left hand side of += or -=
}
}
????