EventHandler具有自定义参数 [英] EventHandler with custom arguments

问题描述

我一直在寻找谷歌大约一个小时的答案，但我没有找到我正在寻找的东西。

I've been looking for an answer for about an hour on Google but I did not found exactly what I'm looking for.

基本上，我有一个静态助手类，帮助执行我在应用程序中频繁执行的许多事情。在这种情况下，我有一个名为CreateDataContextMenu的方法，它在给定的TreeView控件上创建一个上下文菜单。

Basically, I have a static Helper class that helps perform many things I do frequently in my App. In this case, I have a method named "CreateDataContextMenu" that creates a context menu on a given TreeView control.

public static void CreateDataContextMenu(Form parent, TreeView owner, string dataType)
{ ... }

TreeView所有者是我将关联我的上下文菜单的控件。

TreeView owner is the control in which I will associate my context menu.

然后在我添加一个Click事件到一个MenuItem像这样：

Then later on I add a Click event to a MenuItem like this:

menuItemFolder.Click += new System.EventHandler(menuItemFolder_Click);

我在这里遇到的问题是我想将owner和dataType作为参数传递给menuItemFolder_Click事件。

The problem I have here is that I want to pass "owner" and "dataType" as arguments to the menuItemFolder_Click event.

我尝试过以下操作：

menuItemFolder.Click += new System.EventHandler(menuItemFolder_Click(sender,e,owner,dataType));
(...)
private static void menuItemFolder_Click(object sender, System.EventArgs e, Treeview owner, string dataType)
{...}

但它根本不起作用。这样做可能非常天真，但是我对事件处理程序还不太满意。

But it doesn't work at all. It might be very naive of me to do it that way but I"m not very comfortable with event handler yet.

有什么想法可以这样做？
我的第一个猜测是，我需要为这个具体的案例创建自己的EventHandler，我是否正确的方向？

Any idea on how I could do that? My first guess is that I need to create my own EventHandler for this specific case. Am I going in the right direction with that?

推荐答案

您应该创建一个 lambda表达式，该表达式调用一个方法额外的参数：

You should create a lambda expression that calls a method with the extra parameters:

menuItemFolder.Click += (sender, e) => YourMethod(owner, dataType);

这篇关于EventHandler具有自定义参数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！