最大化MDI子表单

Question

我正在研究一个传统的WinForms MDI应用程序,并且在使子表单按我的意愿运行时遇到一些麻烦.我的目标是让孩子的形式始终最大化(停靠).

问题是,即使我设置MaximizeBox为false最大化/调整大小按钮出现在MDIs工具条中,并让用户调整(取消停靠)子窗体.避免这种情况的唯一方法是设置ControlBox为false但然后关闭按钮消失(这不是我想要的).

我已经尝试使用一个固定的FormBorderStyle并在调整resize事件时最大化子窗体,但我的方法都没有用.

我错过了什么超级秘密财产,还是不可能？

最好的问候和提前谢谢

更新

我写了一个低级方法(感谢@rfresia)来处理我的子表单,它可能会帮助其他遇到同样问题的人:

//All child forms derive from ChildForm
//Parent MDI Form implementation
//...
private void ShowForm(ChildForm form)
{
    //Check if an instance of the form already exists
    if (Forms.Any(x => x.GetType() == form.GetType()))
    {
        var f = Forms.First(x => x.GetType() == form.GetType());
        f.Focus();
        f.WindowState = FormWindowState.Maximized;
    }
    else
    {
        //Set the necessary properties (any other properties are set to default values)
        form.MdiParent = this;
        form.MaximizeBox = false;
        form.MinimizeBox = false;
        form.WindowState = FormWindowState.Maximized;
        Forms.Add(form);
        form.Forms = Forms;
        form.Show();
        form.Focus();
        //Lets make it nasty (some forms aren't rendered properly otherwise)
        form.WindowState = FormWindowState.Normal;
        form.WindowState = FormWindowState.Maximized;
    }
}
//...

//ChildForm implementation
//...
public List<Form> Forms { get; set; }
protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
{
    Forms.RemoveAll(x => x.GetType() == GetType());
}

protected override void OnResize(EventArgs e)
{
    WindowState = FormWindowState.Maximized;
}

Answer 1

这个问题不容易解决,但我偶然发现了答案,而且很简单; 默认情况下,将子窗体的windowstate设置为Normal.然后确保在调用方法后重置子窗口的windowstate Show().

例:

private void ShowNewForm(object sender, EventArgs e)
{
  Form childForm = new Form();
  childForm.MdiParent = this;
  childForm.Text = "Window " + childFormNumber++;
  childForm.Show();
  childForm.WindowState = FormWindowState.Maximized;
}

Answer 2

您可以覆盖要确保不会最小化的每个子表单的OnResize.或者创建一个BaseForm并从中继承所有子表单.

protected override void OnResize(EventArgs e)
{
   this.WindowState = FormWindowState.Maximized;
}

此外,您可以使用X,y坐标,但OnResize应该足够了.把它放在子表单构造函数中:

   this.WindowState = FormWindowState.Maximized;

   Point NewLoc = Screen.FromControl(this).WorkingArea.Location;
   //Modifiy the location so any toolbars & taskbar can be easily accessed.
   NewLoc.X += 1;
   NewLoc.Y += 1;
   this.Location = NewLoc;

   Size NewSize = Screen.FromControl(this).WorkingArea.Size;
   //Modifiy the size so any toolbars & taskbar can be easily accessed.
   NewSize.Height -= 1;
   NewSize.Width -= 1;
   this.Size = NewSize;

   this.MinimumSize = this.Size;
   this.MaximumSize = this.MinimumSize;

我从这里得到了X,Y的代码:http: //bytes.com/topic/c-sharp/answers/278649-how-do-i-prevent-form-resizing

Answer 3

form1 obj = new form1 ();
obj.MdiParent = MDIGracular.ActiveForm;
obj.StartPosition = FormStartPosition.CenterParent;
obj.WindowState = FormWindowState.Minimized;
obj.Dock = DockStyle.Fill;
obj.Show();
obj.WindowState = FormWindowState.Maximized;