从另一种形式调用监听器[关闭]

Question

我的主表单显示了一些信息，并且可以在第二个表单中编辑相同的信息。主页中的信息从数据库加载（到 DGV），并在触发 TabControl 侦听器时加载。在第二种形式中，我有一个更改数据库中该信息的按钮，当我更改它时，我的主窗体显示错误信息，直到我自己实际触发该 TabControl 侦听器。当我点击第二种形式的按钮时，我应该如何让 TabControl 监听器自动调用？

Answer 1

如果第二个表单是一个弹出对话框，将完成然后关闭，你可以这样做：

SecondForm secondForm = new SecondForm();
secondForm.ShowDialog();

// ShowDialog will block until the new form is closed.

RefreshData(); // we know that the user is done with the second form, so we can check for changes here.

否则，您可以传入对父表单的引用，并根据需要从子表单更新它。在您的父表单中：

SecondForm secondForm = new SecondForm(this); // pass a reference to the parent form into the child form's constructor
secondForm.Show(); // unlike ShowDialog(), Show() will not block the parent form.  The user can use both forms at the same time.

然后在您的子表单中：

FirstForm ParentForm { get; set; }

public SecondForm(FirstForm parent)
{
    InitializeComponent();
    this.ParentForm = parent; // store the reference for later use
}

private void button1_Click(object sender, EventArgs e)
{
    ParentForm.Name = txtName.Text; // set a public property on the parent form
    ParentForm.Address = txtAddress.Text;

}