我正在研究传统的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。 我的目标是让孩子形式始终最大化(停靠)。
问题是,即使我将MaximizeBox
设置为false
,最大化/调整大小按钮也会显示在MDI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将ControlBox
设置为false
,但关闭按钮会消失(这不是我想要的)。
我已经尝试使用固定的FormBorderStyle
并在触发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,还是只是不可能?
最好的问候&提前致谢
我写了一个低级的方法(感谢@rfresia)处理我的孩子表格,它可以帮助其他人遇到同样的问题:
//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;
}
答案 0 :(得分:15)
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。然后确保重置子窗口的windowstate AFTER ,并调用Show()
方法。
示例:
private void ShowNewForm(object sender, EventArgs e)
{
Form childForm = new Form();
childForm.MdiParent = this;
childForm.Text = "Window " + childFormNumber++;
childForm.Show();
childForm.WindowState = FormWindowState.Maximized;
}
答案 1 :(得分:13)
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
答案 2 :(得分:4)
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;
答案 3 :(得分:2)
这就是我克服同样的问题,不记得我在哪里找到了代码。
private const int WM_SYSCOMMAND = 0x112;
private const int SC_MINIMIZE = 0xF020;
private const int SC_MAXIMIZE = 0xF030;
private const int SC_CLOSE = 0xF060;
private const int SC_RESTORE = 0xF120;
protected override void WndProc(ref Message msg)
{
if ((msg.Msg == WM_SYSCOMMAND) &&
(((int)msg.WParam == SC_MINIMIZE) || ((int)msg.WParam == SC_MAXIMIZE) ||
((int)msg.WParam == SC_CLOSE)) || ((int)msg.WParam == SC_RESTORE))
{
//do nothing
} // end if
else
{
base.WndProc(ref msg);
} // end else
}
答案 4 :(得分:0)
在我的应用程序中,我发现如果我只将这两行放在它运行的表单加载事件中。感谢sarvjeet的基本想法。为你+1 +1
this.WindowState = FormWindowState.Minimized;
this.WindowState = FormWindowState.Maximized;