如何获取谁在委托

Question

比如一个button1,有如下的委托事件
button1.Click += new System.EventHandler(this.menuClick);        private void menuClick(object sender, EventArgs e)
        { 
        
        }怎么能根据事件"menuClick"获取到button1对象.

Answer 1

Button button1=sender as Button;

Answer 2

        private void menuClick(object sender, EventArgs e) 
        { 
        
        } 

Answer 3

反射场景描述的详细点你是想获取运行时的实参？有没有试过：
public class StackFrame
    Member of System.Diagnostics

Answer 4

没有写明白
另外还有若干个button也引用了这个委托,怎么在一个方法内,将这些引用的button找到,而不是在这个事件内找到.

Answer 5

  foreach (Delegate delItem in Click.GetInvocationList())
                {
                    delItem.Target
                  
                }

Answer 6

        List<Button> GetMethodObject(string method)
        {
            List<Button> list = new List<Button>();
            PropertyInfo pi = typeof(Component).GetProperty("Events", BindingFlags.NonPublic | BindingFlags.Instance);
            foreach (FieldInfo fi in this.GetType().GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static))
            {
                if (fi.FieldType == typeof(Button))
                {
                    Button btn = fi.GetValue(this) as Button;
                    EventHandlerList ehl = pi.GetValue(btn, null) as EventHandlerList;
                    object key = typeof(Control).GetField("EventClick", BindingFlags.NonPublic | BindingFlags.Static).GetValue(null);
                    Delegate del = ehl[key];
                    foreach (Delegate de in del.GetInvocationList())
                        if (de.Method.Name == method)
                            list.Add(btn);
                }
            }
            return list;
        }

Answer 7

我扩展了一下button类型,马上结贴        private List<Control> GetMethodObject(string method)
        {
            List<Control> list = new List<Control>();
            PropertyInfo pi = typeof(Component).GetProperty("Events", BindingFlags.NonPublic | BindingFlags.Instance);
            foreach (FieldInfo fi in this.GetType().GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static))
            {
                if (fi.FieldType == typeof(Button))
                {
                    Control btn = fi.GetValue(this) as Control;
                    EventHandlerList ehl = pi.GetValue(btn, null) as EventHandlerList;
                    object key = typeof(Control).GetField("EventClick", BindingFlags.NonPublic | BindingFlags.Static).GetValue(null);
                    Delegate del = ehl[key];
                    foreach (Delegate de in del.GetInvocationList())
                        if (de.Method.Name == method)
                            list.Add(btn);
                }
            }
            return list;
        }

Answer 8

if (fi.FieldType == typeof(Button)) 
=>
if (fi.FieldType == typeof(Control)) 

Answer 9

最终的版本        private List<Control> GetMethodObject(string method)
        {
            List<Control> list = new List<Control>();
            PropertyInfo pi = typeof(Component).GetProperty("Events", BindingFlags.NonPublic | BindingFlags.Instance);
            foreach (FieldInfo fi in this.GetType().GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static))
            {
               
                if (fi.FieldType.IsSubclassOf(typeof(Control)))
                {
                    Control ctl = fi.GetValue(this) as Control;
                    EventHandlerList ehl = pi.GetValue(ctl, null) as EventHandlerList;
                    object key = typeof(Control).GetField("EventClick", BindingFlags.NonPublic | BindingFlags.Static).GetValue(null);
                    Delegate del = ehl[key];
                    if (del != null)
                    {
                        foreach (Delegate de in del.GetInvocationList())
                        {
                            if (de.Method.Name == method)
                                list.Add(ctl);
                        }
                    }
                }
            }
            return list;
        }