Setting default property value for user control

  • Thread starter Thread starter Brian Henry
  • Start date Start date
B

Brian Henry

Hi,

I have a user control who's class starts like this

Imports System.Drawing

Imports System.Drawing.Drawing2D

Imports System.ComponentModel



<ToolboxBitmap(GetType(Windows.Forms.Panel)), Category("test")> _

Public Class dialogTopBar

Inherits System.Windows.Forms.UserControl



what I want to do is set the dock property's default value to top so when
its added to the form it automatically docks to the top dock location, how
would I go about doing that in this declaration? thanks
 
Brian Henry said:
Hi,

I have a user control who's class starts like this

Imports System.Drawing

Imports System.Drawing.Drawing2D

Imports System.ComponentModel



<ToolboxBitmap(GetType(Windows.Forms.Panel)), Category("test")> _

Public Class dialogTopBar

Inherits System.Windows.Forms.UserControl



what I want to do is set the dock property's default value to top so when
its added to the form it automatically docks to the top dock location, how
would I go about doing that in this declaration? thanks
Click to expand...

You will need a custom designer, and in the OnSetComponentDefaults override,
do something like:

MyBase.Control.Dock = ...

Let me know if you need more info on custom designers. Meantime, a look at
DesignerAttribute should point you the right direction to get going.

Best Regards,

Andy
 
Hi Brian,

I agree with Andy's suggestion, here goes the code.
<DesignerAttribute(GetType(TestControlDesigner))> _
Public Class UserControl1
Inherits System.Windows.Forms.UserControl

'........ omit the generated code

End Class

Public Class TestControlDesigner
Inherits System.Windows.Forms.Design.ControlDesigner
Public Overrides Sub OnSetComponentDefaults()
MyBase.Control.Dock = DockStyle.Top
End Sub
End Class

You may also take a look at the ControlDesigner Class.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/
frlrfsystemwindowsformsdesigncontroldesignerclasstopic.asp

Best regards,

Peter Huang
Microsoft Online Partner Support

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This posting is provided "AS IS" with no warranties, and confers no rights.
 
i cant get the designerattribute property to show up... even with importing
all these...

Imports System

Imports System.ComponentModel

Imports System.ComponentModel.Design

Imports System.Collections

Imports System.Drawing

Imports System.Diagnostics

Imports System.Windows.Forms

Imports System.Windows.Forms.Design
 
Brian Henry said:
i cant get the designerattribute property to show up... even with importing
all these...
Click to expand...

Oops, that is a confusing part about attributes. You don't acually use
include "Attribute". Try this:

System.ComponentModel.Designer(GetType(...

Best Regards,

Andy
 
When I follow the example in the MDSN on DesignerAttrributes, for the statement

Inherits System.Windows.Forms.Design.ControlDesigner

I get an error saying that the type is not defined. I copied all the
imports and other parts directly from the MSDN using cut and paste. Any idea
what's going on?
 
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