c# - 如何为 mdi 容器创建函数

Question

如何为我的以下代码创建一个函数，这样我就不必编写以下整个代码来使表单用作 MDICHILD 表单。

Students stu = null;
private void studentsToolStripMenuItem1_Click(object sender, EventArgs e)
{
  if (stu == null || stu.IsDisposed)
  {
    stu = new Students();
    stu.MdiParent = this;
    stu.Show();
  }
  else
  {
    stu.Activate();
  }
}

Answer 1

您的代码没有任何问题。你可以通过一些反射(reflection)让它变干:

    public Form CreateMdiChild(Type type, bool singleton) {
        if (singleton) {
            foreach (var child in this.MdiChildren) {
                if (child.GetType() == type) {
                    child.WindowState = FormWindowState.Normal;
                    child.Show();
                    child.Activate();
                    return child;
                }
            }
        }
        Form form = (Form)Activator.CreateInstance(type);
        form.MdiParent = this;
        form.Show();
        return form;
    }

用法:

 CreateMdiChild(typeof(Students), true);