user control problem

[adshocker]

hi all,

i created a user control and inherited a textbox.

is it possible to remove some of the inherited properties of the user control?

like to Multi-Line, PasswordChar etc... also at the Form Design, when selecting the user control, there's an arrow on the upper-right which i also want to remove. how can i do this?

thanks

[jmcilhinney]

First up, a user control is a class that inherits UserControl. If you inherited TextBox then it's more correctly a custom control.

As for the first question, you can't actually remove an inherited member. All you can do is hide the member from the IDE. The following code creates a custom TextBox control that will not display its Multiline property in either the design window or the Intellisense lists in the code window:

Imports System.ComponentModel
 
Public Class TextBoxEx
    Inherits TextBox
 
    <EditorBrowsable(EditorBrowsableState.Never), Browsable(False)> _
    Public Shadows Property Multiline() As Boolean
        Get
            Return MyBase.Multiline
        End Get
        Set(ByVal value As Boolean)
            MyBase.Multiline = value
        End Set
    End Property
 
End Class

The member still exists, so it can still be accessed in code. you just won't get any help from the IDE to do so.

As for the last question, that is called a smart tag and is created using XML. I don't how you'd remove it, or even if you can, but if you were to read up about how they're created in the first place then that might lead you to a way to remove it in a derived class.

[adshocker]

thanks...

this is able to hide the property at design time...

i did try a few search regarding the smart tag and came across a thread that suggested i should override the PostFilterProperties.

    Protected Overridable Sub PostFilterProperties(ByVal properties As IDictionary)
        With properties
            .Remove("Multiline")
        End With
    End Sub

can't get it to work yet... still digging.