在构造函数中的C＃调用事件

如果您正在使用，winform请查看以下代码

public partial class Form1 : Form //Your initial form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        LaunchWorkForm();
    }
    private void LaunchWorkForm()
    {
        var form2 = new Form2();
        form2.OnStatusUpdated += form2_OnStatusUpdated;
        form2.ShowDialog();
    }

    private void form2_OnStatusUpdated(string status)
    {
        //message comes from Working Form
        //Invoke UI thread and update UI here
    }
}

现在，这是您的表单或对话框，需要做很多工作

public partial class Form2 : Form
{
    public delegate void UpdateStatusHandler(string status);
    public event UpdateStatusHandler OnStatusUpdated;
    public Form2()
    {
        //Start thread here
        if (OnStatusUpdated != null)
        {
            OnStatusUpdated("I am going to start work");
        }
        //Doing a lot of work here
        if (OnStatusUpdated != null)
        {
            OnStatusUpdated("Some of work has been done");
        }
        //Do other
        if (OnStatusUpdated != null)
        {
            OnStatusUpdated("Now I am ready to load the form");
        }
    }
}