winforms - 在Form构造函数中传递参数，winforms c#

Question

我有以下继承层次结构:

A类:表格
B级:A级

A 类需要能够接受一个参数，以便我可以像这样创建 B 类的实例:

ClassB mynewFrm = new ClassB(param);

如何在 A 类中定义这样的构造函数？

谢谢!

我在 .net 3.5、c# 中使用 Winforms

编辑:
A 类和 B 类被定义为表单，使用部分类。
所以我想这变成了一个关于部分类和自定义(覆盖)构造函数的问题。

Answer 1

这是一个完整的演示示例，用于演示所需的行为。

为了方便大家学习，我选择了字符串 您根据情况调整的类型参数。

要测试它，请创建一个新的 Visual Studio *C#* 项目和填充 程序.cs 使用以下代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace Stackoverflow
{

    public class ClassA : Form
    {
        public ClassA()
        {
            InitializeComponent();
        }

        public ClassA(string WindowTitleParameter)
        {
            InitializeComponent();
            this.Text = WindowTitleParameter;
            MessageBox.Show("Hi! I am ClassB constructor and I have 1 argument. Clic OK and look at next windows title");
        }

        private void InitializeComponent() // Usually, this method is located on ClassA.Designer.cs partial class definition
        {
            // ClassA initialization code goes here
        }

    }

    public class ClassB : ClassA
    {
        // The following defition will prevent ClassA's construtor with no arguments from being runned
        public ClassB(string WindowTitleParameter) : base(WindowTitleParameter) 
        {
            InitializeComponent();
            //this.Text = WindowTitleParameter;
            //MessageBox.Show("Hi! I am ClassB constructor and I have 1 argument. Clic OK and look at next windows title");
        }

        private void InitializeComponent() // Usually, this method is located on ClassA.Designer.cs partial class definition
        {
            // ClassB initialization code goes here
        }

    }

    static class Program
    {
        /// <summary> 
        /// The main entry point for the application. 
        /// </summary> 
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            // If you debug this code using StepInto, you will notice that contructor of ClassA (argumentless)
            // will run prior to contructor of classB (1 argument)

            Application.Run(new ClassB("Look at me!"));
        }
    }
}