c# - Winforms C# 中基类与派生类控件交互

Question

假设我有一个从“Form”继承的 FormBase 类，并且我有从 FormBase 继承的 winforms 表单，我如何访问和操作子表单中的控件，如下所示:

public class FormBase : Form
    {

        protected FormBase()
        {
          //for each Control in Child form Controls

          //Do something with the Controls
        }
    }

public partial class Products : FormBase 
    {
        public Products()
        {
            InitializeComponent();            
         }
    }

Answer 1

您不应在基本表单的构造函数中访问子表单的控件。因为基构造函数将首先运行，然后子构造函数运行。

相反，你应该这样做

public class FormBase : Form
{
   protected override void OnLoad(EventArgs e)
   {
     //access the child controls here. Take a look at Will A's answer
     base.OnLoad(e);
   }
}