使用一个方法comboBox_SelectedIndexChanged控制许多组合框

Question

例如，我有100个组合框，需要在选择新索引时更新特定的组合框。当组合框设置新值时，如何仅使用一种方法来捕获事件？

Answer 1

只创建一个事件处理程序ComboBox_SelectedIndexChanged，并为此事件订阅所有组合框：

combobox1.SelectedIndexChanged += ComboBox_SelectedIndexChanged;
combobox2.SelectedIndexChanged += ComboBox_SelectedIndexChanged;
combobox3.SelectedIndexChanged += ComboBox_SelectedIndexChanged;
combobox4.SelectedIndexChanged += ComboBox_SelectedIndexChanged;
//and so on

事件处理程序代码：

private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
    //now "sender" is the reference to the combo box raised the event
    //so just cast it
    ComboBox combobox = sender as ComboBox;

    //now access it as you want
}