为多个表单设置单个事件处理程序 [英] Set up single event handler for multiple forms
问题描述
我已经尝试实现一个共享类，并将Eventhandler链接到那个功能，但是当我给予功能必要的保护等级时，它抱怨它是非静态的，我也必须使它静止。
我是不是静态功能的粉丝，所以问：有更好的方法吗？
（如果上述不清楚：我想这样做： a href =https://stackoverflow.com/questions/4157851/set-up-single-event-handler-for-multiple-buttons-in-net>在.NET中为多个按钮设置单个事件处理程序？，但使用多种形式而不是多重控件）
编辑：根据更多信息的要求：
我对于代码重复是相当的OCD，而且我的程序在同一时间有多个表单是主动/隐藏的，显然我想要按下这个x来关闭整个程序：
class Shared
{
public static void FormClosed（object sender，FormClosedEventArgs e）
{
Application.Exit （）;
}
public static void FormClosing（object sender，FormClosingEventArgs e）
{
if（MessageBox.Show（你确定要退出吗？ 确认退出，MessageBoxButtons.YesNo，MessageBoxIcon.Question）== DialogResult.No）{
e.Cancel = true;
}
}
}
非常简单的功能，我知道，但我不喜欢重复：P
public static的上述配置工作正常，但我只是想知道是否有更好的方式 （tm）
如果你不想要一个静态类，你有两个简单的选项来满足大多数偏好： p>
- singleton
- 传递参数以形成ctor
单身人士：
class EventMangler {
private static readonly _instance = new SomeHandler（）;
//虽然你不喜欢静态方法:(
static EventMangler Instance {
get {return _instance;}
public void SomeEventHandler对象发件人，EventArgs e）{
//处理事件
}
}
//使用EventMangler.Instance
public MyForm（）{
InitializeComponent（）;
button1.Click + = EventMangler.Instance.SomeEventHandler;
}
要将参数传递给Form的构造函数，您有更多的选择：（a）将引用传递给处理程序的对象，或者（b）传递对处理程序本身的引用，我更喜欢选项（b）处理程序，否则，如果父对象 - 例如 EventMangler - 有多个处理程序，请使用选项（a）：
//从EventMangler中删除单例实例方法
//在程序中实例化EventMangler并传递给Form ctors
//将单个处理程序引用传递为Action
public MyForm（Action < object，EventArgs> handler）{
InitializeComponent（）;
button1.Click + = handler;
}
I have some forms, and in them i have some event functions which are basically identical
I have tried to implement a 'Shared' class and link the Eventhandler to that function, but when i give the function the necessary protection level, it complains about it's non-static-ness and i have to make it static also.
I'm not a fan of static functions, and so ask: Is there a better way to do it?
(In case the above is unclear: I want to do this: Set up single event handler for multiple buttons in .NET? but with multiple forms instead of multiple controls)
EDIT: as per request for more info:
I'm fairly OCD about code duplication, and my program has multiple forms active/hidden at the same time, and obviously i want to close the whole program when the 'x' is pressed so:
class Shared
{
public static void FormClosed(object sender, FormClosedEventArgs e)
{
Application.Exit();
}
public static void FormClosing(object sender, FormClosingEventArgs e)
{
if (MessageBox.Show("Are you sure you want to exit?", "Confirm exit", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No) {
e.Cancel = true;
}
}
}
Very simple functions, i know, but i don't like duplication :P
The above 'configuration' of 'public static' works fine, but i just wondered if there was a 'better way' (tm)
If you don't want a static class, you have 2 easy options to suit most preferences:
- singleton
- pass parameter to form ctor
For a singleton:
class EventMangler {
private static readonly _instance = new SomeHandler ();
// although you don't like static methods :(
static EventMangler Instance {
get { return _instance; }
public void SomeEventHandler (object sender, EventArgs e) {
// handle event
}
}
// use EventMangler.Instance
public MyForm () {
InitializeComponent();
button1.Click += EventMangler.Instance.SomeEventHandler;
}
To pass a parameter to the Form's constructor, you have more choices: (a) pass reference to the handler's object, or (b) pass a reference to the handler itself. I prefer option (b) for a single handler. Otherwise, if the parent object - e.g. EventMangler - has multiple handlers, use option (a):
// remove singleton Instance method from EventMangler
// instantiate EventMangler in Program and pass to Form ctors
// pass a single handler reference as Action
public MyForm (Action<object, EventArgs> handler) {
InitializeComponent();
button1.Click += handler;
}
这篇关于为多个表单设置单个事件处理程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
