如何在运行时为动态创建的控件添加事件处理程序？ [英] How to add event handler for dynamically created controls at runtime?

问题描述

我正在使用C＃Windows应用程序。我的应用程序从自定义控件库中获取控件（按钮，文本框，富文本框和组合框等），并在运行时动态地将其放入表单中。如何使用委托为该控件创建事件处理程序？以及如何在特定的自定义控件点击事件中添加业务逻辑？

I am working on C# windows application. my application get controls(button,text box,rich text box and combo box etc)from custom control library and placed them into form dynamically at run time. how i create event handler for that controls using delegate? and how to add business logic in particular custom control click event?

例如：

我有user1， user2，user3，当user1登录时，我只想显示保存按钮。当user2然后仅显示添加和删除按钮，而用户3仅显示添加和更新按钮时。根据用户创建的文本框和按钮登录从DB表中获取的信息。在这种情况下，我如何处理不同的事件（添加，保存，更新，删除），用于在动态创建表单控件时保存，添加，删除和更新按钮（保存，添加，删除和更新按钮对象来自同一按钮类）

i have user1, user2, user3, when user1 log in i want to show only "save" button. when user2 then only show "add and delete" buttons and user 3 only show "add and update" buttons.text boxes and button created as per user log in information taken from DB tables.in this scenario how i handle different event(adding,saving,updating,deleting) for button save,add,delete and update for different users when form is dynamically created controls(save,add,delete and update button object is from same button class)

推荐答案

使用匿名方法：

Button button1 = new Button();
button1.Click += delegate
                    {
                        // Do something 
                    };

使用带有显式参数的匿名方法：

With an anonymous method with explicit parameters:

Button button1 = new Button();
button1.Click += delegate (object sender, EventArgs e)
                    {
                        // Do something 
                    };

使用lambda语法表示匿名方法：

With lambda syntax for an anonymous method:

Button button1 = new Button();
button1.Click += (object sender, EventArgs e) =>
                    {
                        // Do something 
                    };

使用方法：

Button button1 = new Button();
button1.Click += button1_Click;

private void button1_Click(object sender, EventArgs e)
{
    // Do something
}

您可以在 MSDN文档。

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