Control Properties of Type System.Drawing.Color

[Nathan Sokalski]

I have a control with a property of type System.Drawing.Color. When I use
the control, the Property Grid in Visual Studio 2005 shows it, and even
gives me a dropdown list to select a color from. But it does not like the
value that gets put in the source. I get warnings like:

Generation of designer file failed: Cannot create an object of type
'System.Drawing.Color' from its string representation 'Green' for the
'BackgroundColor' property.

Am I not allowed to use colors as properties? Is there a property attribute
I need to add? It seems like a color should be a simple thing to add, since
there is only one value that needs specified in order choose it, and since
Visual Studio automatically gives me a list in the Property Grid to choose
from, I am assuming I am just missing something simple that I don't know
about. Any help would be appreciated. Thanks.

 

[James Hahn]

This is presumably a user control. What is your code for the
BackgroundColor property?

 

[Nathan Sokalski]

Actually, it is a custom control that inherits System.Web.UI.Control. My
code for the BackgroundColor property is:

Public WriteOnly Property BackgroundColor() As System.Drawing.Color
Set(ByVal value As System.Drawing.Color)
Me._backgroundcolor = value
End Set
End Property

Me._backgroundcolor is declared as:

Private _backgroundcolor As System.Drawing.Color

I know that my syntax for the property declaration is correct, I have used
it many times in other classes for other types (such as String, Integer,
etc.), just never with System.Drawing.Color. Any ideas? Thanks.

 

[Jeff Johnson]

Actually, it is a custom control that inherits System.Web.UI.Control. My
code for the BackgroundColor property is:

Public WriteOnly Property BackgroundColor() As System.Drawing.Color
Set(ByVal value As System.Drawing.Color)
Me._backgroundcolor = value
End Set
End Property

Me._backgroundcolor is declared as:

Private _backgroundcolor As System.Drawing.Color

I know that my syntax for the property declaration is correct, I have used
it many times in other classes for other types (such as String, Integer,
etc.), just never with System.Drawing.Color. Any ideas? Thanks.

Since this is derived from a Web class, I can't really help much, being a
desktop guy, but I have to wonder: why WriteOnly?

 

[Nathan Sokalski]

Sometimes when developing my controls I don't add the Get's until later so
that I can see more of the properties on the screen at once. And since it is
a control intended primarily for declarative usage, it will allow me to use
it normally when testing. Yes, I do plan on adding the Get's before putting
it on my site, and maybe I do have a strange style, but most of the controls
I write are simply for the enjoyment, so who cares?

 

[James Hahn]

That looks like proper Property set code to me. What is the line of code
that the designer is generating in the Sub InitializeComponent for a color
that you select in the Properties Settings?