错误'WindowsFormsApplication1.Form1.Delobj'是'type'，在给定的上下文中无效

Question

这是我的代码：

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public delegate void Delobj();
        Delobj obj;

        private void Form1_Load(object sender, EventArgs e)
        {
            Form2 obj2 = new Form2();
            obj2.Show();
            Form3 obj3 = new Form3();
            obj3.Show();
            Delobj += obj2.getmessage();
            Delobj += obj3.getmessage();    
        }

        private void button1_Click(object sender, EventArgs e)
        {
            obj.Invoke();
        }
    }
}

我收到此错误：

  

错误1'WindowsFormsApplication1.Form1.Delobj'是'type'，在给定的上下文中无效E：\ net \ projects \ WindowsFormsApplication1 \ WindowsFormsApplication1 \ Form1.cs 33 13 WindowsFormsApplication1

Answer 1

Delobj是委托的类型。您需要设置为不接受任何参数的有效void方法的Delobj类型的实际实例变量称为obj

  obj += obj2.getmessage();
  obj += obj3.getmessage();