我正在試圖利用我正在嘗試開發的事件方面的插件體系結構。我可以在單個應用程序中做到這一點:(顯然,這是我試圖完成的一個非常簡化的版本,如果這是我的代碼,有更簡單的方法來完成此操作,只需遵循邏輯;)在插件體系結構中激發事件與單個應用程序
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)
{
...
}
}
不過,現在我有一個插件架構,其中插件實現裏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 -=
}
}
????