现写了一段代码,可实现楼主需求。using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms;namespace TestKeyUp { public partial class Form1 : Form { public Form1() { InitializeComponent(); } int iEventID = 0;
在这个方法里,做判断,其中 sender 里是你的控件属性, e是你键盘操作
这样你想怎么组合都可以,也可以都拆开写,随你,给你写个例子,你看看 这样能解决你的问题不
private void KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyValue == 37 || e.KeyValue == 39)
//方法0 当输入 37,39时
return; if (e.KeyCode == Keys.F2)
{
//方法1 当键盘 输入 F2时
return;
} if (e.KeyCode == Keys.Enter)
{
//方法2当键盘 输入 F2时
return;
} if (sender == textBox1 && e.KeyCode == Keys.Enter)
{
//方法3 在控件 textBox1里 输入 回车
return;
}
else if (sender == textEdit_Depart_area_name )
{
//方法4 在 控件 textEdit_Depart_area_name 时
return;
}
}
BindingFlags myBindingFlags = BindingFlags.Static | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
Type t = typeof(System.Windows.Forms.Control);
EventInfo ei = btnInsert.GetType().GetEvent("KeyUp", myBindingFlags); FieldInfo fi = t.GetField("EventClick", myBindingFlags); EventHandlerList ehl = btn.GetType().GetProperty("Events", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy).GetValue(btn, null) as EventHandlerList; if (ehl != null)
{
Delegate d = ehl[fi.GetValue(btn)];
if (d != null&&d.GetInvocationList().Count()>0)
{
//已绑定
}
}
因为 Control.KeyDown 重新包装了,只有 add 和 remove
[SRDescription("ControlOnKeyDownDescr"), SRCategory("CatKey")]
public event KeyEventHandler KeyDown
{
add
{
base.Events.AddHandler(EventKeyDown, value);
}
remove
{
base.Events.RemoveHandler(EventKeyDown, value);
}
}如果你自定义的事件:
public event KeyEventHandler MyEvent;
这样就可以通过 != / == 判断是否添加过 Handler 建议lz换个思路判断,比如将 KeyDown 绑定到一个 DispatchedHandler 上
在 Dispatcher 里判断调用不同的方法。如果一定要通过 != / == 判断也可以用反射:
var bindingFlags = System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic;
var eventKeyDown = typeof(Control).GetField("EventKeyDown", bindingFlags).GetValue(null);
KeyEventHandler handler = (KeyEventHandler)base.Events[eventKeyDown];
if (handler != null)
MessageBox.Show("Has Handler");
else
MessageBox.Show("Not Handler");
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;namespace TestKeyUp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
int iEventID = 0;
delegate void MyKeyUp(object o, KeyEventArgs k);
event MyKeyUp OldEvent;
private void Form1_Load(object sender, EventArgs e)
{
SaveEvent();
}
private void Form1_KeyUpA(object sender, KeyEventArgs e)
{
MessageBox.Show("A");
iEventID++;
SaveEvent();
}
private void Form1_KeyUpB(object sender, KeyEventArgs e)
{
MessageBox.Show("B");
iEventID++;
SaveEvent();
}
private void Form1_KeyUpC(object sender, KeyEventArgs e)
{
MessageBox.Show("C");
iEventID = 0;
SaveEvent();
}
private void SaveEvent()
{
switch (iEventID)
{
case 0:
if (OldEvent != null)
{
this.KeyUp -= new System.Windows.Forms.KeyEventHandler(OldEvent);
}
OldEvent = this.Form1_KeyUpA;
this.KeyUp += new System.Windows.Forms.KeyEventHandler(OldEvent);
break;
case 1:
this.KeyUp -= new System.Windows.Forms.KeyEventHandler(OldEvent);
OldEvent = this.Form1_KeyUpB;
this.KeyUp += new System.Windows.Forms.KeyEventHandler(OldEvent);
break;
case 2:
this.KeyUp -= new System.Windows.Forms.KeyEventHandler(OldEvent);
OldEvent = this.Form1_KeyUpC;
this.KeyUp += new System.Windows.Forms.KeyEventHandler(OldEvent);
break;
}
}
}
}
你的Handler都绑定到你自定义事件上,这样通过自定义事件的 != null 也可以处理。
EventClick {object} object
EventClientSize {object} object
EventContextMenu {object} object
EventContextMenuStrip {object} object
EventControlAdded {object} object
EventControlRemoved {object} object
EventCursor {object} object
EventDock {object} object
EventDoubleClick {object} object
EventDragDrop {object} object
EventDragEnter {object} object
EventDragLeave {object} object
EventDragOver {object} object
EventEnabled {object} object
EventEnabledChanged {object} object
EventEnter {object} object
EventFont {object} object
EventForeColor {object} object
EventGiveFeedback {object} object
EventGotFocus {object} object他们均是以object类型存储的,
在你需要查询的控件Button的继承对象:
System.Windows.Forms.ButtonBase -->
System.Windows.Forms.Control -->
System.ComponentModel.Component -->
System.MarshalByRefObject -->
中的一个非公共属性“Events {System.ComponentModel.EventHandlerList}”中存储了所有的事件列表,他们存储的数据都在非公共属性中,还是继续使用反射才可以取得他们。
第一个事件在“head {System.ComponentModel.EventHandlerList.ListEntry}”中,head对象的属性“key {object}”就是上面的那些object,
head对象的属性“handler”中的“_invocationList {object[]}”属性便是所有事件的列表head对象的“next {System.ComponentModel.EventHandlerList.ListEntry}”属性为下一个委托列表,如果为null,那么没有委托,next对象与head的内容格式完全相同
这里的解决办法应该可以。