C＃面板作爲MDI容器

Question

在C＃中，我想創建一個具有MDI容器屬性的面板。 isMdiContainer = true。

我想是這樣的

form.MDIParent = this.panel1; 

但這不工作。有什麼建議麼？

Answer 1

您可以創建自定義表單，刪除所有邊框和工具欄，使之儘可能接近看面板越好。然後使新的自定義窗體成爲MdiContainer。

基本上，你只能設置一個窗體上IsMdiContainer屬性。這意味着只有一個表單可以是MdiContainer。

Answer 2

它可以創建一個MDI面板和顯示形式在面板上，像下面的代碼將做的工作

MDI面板definiton：

public class MdiClientPanel : Panel 
{ 
    private Form mdiForm; 
    private MdiClient ctlClient = new MdiClient(); 

    public MdiClientPanel() 
    { 
     base.Controls.Add(this.ctlClient); 
    } 

    public Form MdiForm 
    { 
     get 
     { 
      if (this.mdiForm == null) 
      { 
       this.mdiForm = new Form(); 
       /// set the hidden ctlClient field which is used to determine if the form is an MDI form 
       System.Reflection.FieldInfo field = typeof(Form).GetField("ctlClient", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance); 
       field.SetValue(this.mdiForm, this.ctlClient); 
      } 
      return this.mdiForm; 
     } 
    } 
} 

用法：

/// mdiChildForm is the form that should be showed in the panel 
/// mdiClientPanel is an instance of the MdiClientPanel 
myMdiChildForm.MdiParent = mdiClientPanel1.MdiForm; 

Answer 3

我用馬蒂亞斯的回答以上，並能擺脫大部分在意見中提出的問題。我還爲子表單創建了一個輔助類，以防有人想使用它和/或使其更好。

public class MdiClientPanel : Panel 
{ 
    private MdiClient _ctlClient = new MdiClient(); 

    // Callback event when a child is activated 
    public delegate void ActivateHandler(object sender, MdiClientForm child); 
    public event ActivateHandler OnChildActivated; 

    /// <summary> 
    /// The current active child form 
    /// </summary> 
    public Form ActiveMDIWnd 
    { 
     get; 
     set; 
    } 

    /// <summary> 
    /// List of available forms 
    /// </summary> 
    public List<MdiClientForm> ChildForms = new List<MdiClientForm>(); 

    /// <summary> 
    /// Std constructor 
    /// </summary> 
    public MdiClientPanel() 
    { 
     base.Controls.Add(_ctlClient); 
    } 

    private Form _mdiForm = null; 
    public Form MdiForm 
    { 
     get 
     { 
      if (_mdiForm == null) 
      { 
       _mdiForm = new Form(); 
       // Set the hidden _ctlClient field which is used to determine if the form is an MDI form 
       System.Reflection.FieldInfo field = typeof(Form).GetField("ctlClient", 
        System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance); 

       field.SetValue(_mdiForm, _ctlClient); 
      } 
      return _mdiForm; 
     } 
    } 

    private void InitializeComponent() 
    { 
     SuspendLayout(); 
     ResumeLayout(false); 
    } 

    /// <summary> 
    /// Add this Form to our list of children and set the MDI relationship up 
    /// </summary> 
    /// <param name="child">The new kid</param> 
    /// <returns>The new kid</returns> 
    public MdiClientForm AddChild(MdiClientForm child) 
    { 
     child.MyMdiContainer = this; 
     child.MdiParent = MdiForm; 
     ChildForms.Add(child); 

     return child; 
    } 

    /// <summary> 
    /// The user sent a "restore" command, so issue it to all children 
    /// </summary> 
    public void RestoreChildForms() 
    { 
     foreach (DataTableForm child in ChildForms) 
     { 
      child.WindowState = FormWindowState.Normal; 
      child.MaximizeBox = true; 
      child.MinimizeBox = true; 
     } 
    } 

    /// <summary> 
    /// Send the Activated message to the owner of this panel (if they are listening) 
    /// </summary> 
    /// <param name="child">The child that was just activated</param> 
    public void ChildActivated(MdiClientForm child) 
    { 
     ActiveMDIWnd = child; 

     if (OnChildActivated != null) 
      OnChildActivated(this, child); 
    } 

    /// <summary> 
    /// The child closed so remove them from our available form list 
    /// </summary> 
    /// <param name="child">The child that closed</param> 
    public void ChildClosed(MdiClientForm child) 
    { 
     ChildForms.Remove(child); 
    } 
} 

/// <summary> 
/// A wrapper class for any form wanting to be an MDI child of an MDI Panel 
/// </summary> 
public class MdiClientForm : Form 
{ 
    /// <summary> 
    /// My parent MDI container 
    /// </summary> 
    public MdiClientPanel MyMdiContainer { get; set; } 

    /// <summary> 
    /// Standard Constructor 
    /// </summary> 
    public MdiClientForm() 
    { 
     Activated += OnFormActivated; 
     FormClosed += OnFormClosed; 
    } 

    /// <summary> 
    /// Reports back to the container when we close 
    /// </summary> 
    void OnFormClosed(object sender, FormClosedEventArgs e) 
    { 
     MyMdiContainer.ChildClosed(this); 
    } 

    /// <summary> 
    /// Reports back to the parent container when we are activated 
    /// </summary> 
    private void OnFormActivated(object sender, EventArgs e) 
    { 
     MyMdiContainer.ChildActivated(this); 
    } 
}