MDI Window in Windows Forms Docking Manager

Provides support for residing multiple windows under a single parent window in the docking manager.

Enable MDI container

To enable MDI functionalities in the docking manager, the IsMdIContainer property of its parent form should be true.

Make MDI child

SetAsMDIChild function helps to set the docking window to the MDIChild window in the docking manager. You can set the docked control as an MDI child by using the MDI Child option in the context menu.

Option to make MDI windows in DockingManager

//To set as MDI Child window

this.dockingManager1.SetAsMDIChild(panel1, true);

this.dockingManager1.SetAsMDIChild(panel2, true);
'To set as MDI Child window

Me.dockingManager1.SetAsMDIChild(panel1, True)

Me.dockingManager1.SetAsMDIChild(panel2, True)

MDI windows for Windows Forms

NOTE

A sample that demonstrates MDI child transition is available in the following sample installation path.
C:\Users\<User>\AppData\Local\Syncfusion\EssentialStudio\Version Number\Windows\Tools.Windows\Samples\Docking Manager\MDI\CS

Make tabbed MDI child using client control

SetAsMDIChild function helps to set the docking window to the tabbed MDIChild window in the docking manager using the TabbedMDIManager control. You can set the docked control as an MDI child easily by using the Tabbed document option in the context menu. To enable this option, attach the parent form of docking manager to MDI container of TabbedMDIManager by using AttachToMdiContainer.

Option to create tabbed documents in DockingManager

//Initialize the TabbedMDI Manager

TabbedMDIManager tabbedMDI = new TabbedMDIManager();

//Attach the Form to TabbedMDI Manager.

tabbedMDI.AttachToMdiContainer(this);

tabbedMDI.TabStyle = typeof(Syncfusion.Windows.Forms.Tools.TabRendererOffice2016Colorful);
  
//To set as MDI Child window

this.dockingManager1.SetAsMDIChild(panel1, true);

this.dockingManager1.SetAsMDIChild(panel2, true);
'Initialize the TabbedMDI Manager

Dim tabbedMDI As New TabbedMDIManager()

'Attach the Form to TabbedMDI Manager.

tabbedMDI.AttachToMdiContainer(Me)

Me.tabbedMDIManager.TabStyle = GetType(Syncfusion.Windows.Forms.Tools.TabRendererOffice2016Colorful)
  
'To set as MDI Child window

Me.dockingManager1.SetAsMDIChild(panel1, True)

Me.dockingManager1.SetAsMDIChild(panel2, True)

Tabbed documents in DockingManager

NOTE

A sample that demonstrates MDI child transition as tabbed is available in the following sample installation path:
C:\Users\<User>\AppData\Local\Syncfusion\EssentialStudio\Version Number\Windows\Tools.Windows\Samples\Docking Manager\SDI\CS

Add icon in caption

SetMDIChildIcon function helps to set custom icons in the caption bar of MDIChild window in the docking manager.

System.Drawing.Icon icon = new System.Drawing.Icon(GetIconFile(GetIconFile(@"..\\..\\\$this.Icon.ico")));
          
//To set icon in MDI Child window
this.dockingManager1.SetMDIChildIcon(panel2, icon);

this.dockingManager1.SetAsMDIChild(panel1, true);

this.dockingManager1.SetAsMDIChild(panel2, true);

private string GetIconFile(string bitmapName)
{
   for (int n = 0; n < 10; n++)
   {
       if (System.IO.File.Exists(bitmapName))
          return bitmapName;

       bitmapName = @"..\" + bitmapName;
   }

   return bitmapName;
}
Dim icon As System.Drawing.Icon = New System.Drawing.Icon(GetIconFile(GetIconFile("..\\..\\\$this.Icon.ico")))

'To set icon in MDI Child window
Me.dockingManager1.SetMDIChildIcon(panel2, icon)

Me.dockingManager1.SetAsMDIChild(panel1, True)

Me.dockingManager1.SetAsMDIChild(panel2, True)

Private Function GetIconFile(ByVal bitmapName As String) As String
	 
   For n As Integer = 0 To 9
				
      If System.IO.File.Exists(bitmapName) Then

					Return bitmapName

			End If

			bitmapName = "..\" & bitmapName
			
   Next n

	 Return bitmapName

End Function

Add icons in caption of MDI window

Change MDI window size

SetAsMDIChild function helps to change the size of MDI window in the docking manager.

this.dockingManager1.SetAsMDIChild(panel1, true, new Rectangle(200, 400, 250, 250));

this.dockingManager1.SetAsMDIChild(panel2, true, new Rectangle(200, 400, 250, 250));
Me.dockingManager1.SetAsMDIChild(panel1,True, New Rectangle(200, 400, 250, 250))

Me.dockingManager1.SetAsMDIChild(panel2,True, New Rectangle(200, 400, 250, 250))

Change MDI window size in DockingManager

Change MDI window to dock window

The MDI window can be moved to dock state by using its ContextMenu option. This can also be done programmatically by using the SetAsMDIChild function.

//Sets the MDI child form to the normal Docking window.

this.dockingManager1.SetAsMDIChild(this.panel1,false);
'Sets the MDI child form to the normal Docking window.

Me.dockingManager1.SetAsMDIChild(Me.panel1,False)

Office 2007 style MDI child form

The MDI child form looks and functions as Office2007. It can be enabled using the Office2007MdiChildForm property.

Change color scheme for Office 2007 style MDI window

Color schemes are supported and specified by using the Office2007MdiColorScheme property.

this.dockingManager1.Office2007MdiChildForm = true;

//Sets the Silver Color scheme.

this.dockingManager1.Office2007MdiColorScheme = Office2007Theme.Silver;
Me.dockingManager1.Office2007MdiChildForm = True

'Sets the Silver Color scheme.

Me.dockingManager1.Office2007MdiColorScheme = Office2007Theme.Silver

Office 2007 theme MDI window

Identify control is in MDI mode or not

The docking manager IsMDIMode function is used to determine the MDI state of a docked window. This function takes the control as its argument and returns true when the specified control is in MDI child mode. Otherwise, it returns false.

MessageBox.Show(this.dockingManager1.IsMDIMode(this.panel1).ToString());
MessageBox.Show(Me.dockingManager1.IsMDIMode(Me.panel1).ToString())