C# 用一个方法控制多个组合框组合框\u选择的索引已更改

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。当组合框设置了新值时，如何仅使用一种方法捕获事件？

仅创建一个事件处理程序

组合框\u SelectedIndexChanged

，并将所有组合框订阅到此事件：

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
}

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如果需要，可以将相同的SelectedIndexChanged事件分配给所有组合框。