Global property

[Mark Goldin]

I have main aspx page with a number of user controls.
How can I create a global property that will be visible in every user
control?

Thanks

[Karl]

create a public property

Say your page is of type WebForm1

Public Class WebForm1
inherits System.Web.UI.P age
private _myvalue as string = "SomeValue"
public readonly property MyValue() as string
get
return _myvalue
end get
end property

Sub Page Load...
....
End Sub

....
End class

In your user controls, you can access MyValue via:

dim pageValue as string = ctype(Page, WebForm1).MyVal ue
Every user control has access to the Page, and by casting it to the specific
type, you have access to it's public property/methods..

Karl
"Mark Goldin" <ma********@com cast.net> wrote in message
news:eH******** ********@TK2MSF TNGP12.phx.gbl. ..

I have main aspx page with a number of user controls.
How can I create a global property that will be visible in every user
control?

Thanks

[Greg Burns]

Karl,

This is quite interesting. But something doesn't seem right to me. A
usercontrol can be placed on any page. Won't this cause problems if you try
and cast the Page object it is "hosted" in to a specific class?

Problems may not be the right word. Shouldn't you do some sort of test to
be sure Page is of the correct type before casting?

If TypeOf (Page) Is WebForm1 Then
dim pageValue as string = ctype(Page, WebForm1).MyVal ue
End If

Greg

"Karl" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net> wrote in
message news:ew******** ********@TK2MSF TNGP14.phx.gbl. ..

create a public property

Say your page is of type WebForm1

Public Class WebForm1
inherits System.Web.UI.P age
private _myvalue as string = "SomeValue"
public readonly property MyValue() as string
get
return _myvalue
end get
end property

Sub Page Load...
...
End Sub

...
End class

In your user controls, you can access MyValue via:

dim pageValue as string = ctype(Page, WebForm1).MyVal ue
Every user control has access to the Page, and by casting it to the specific type, you have access to it's public property/methods..

Karl
"Mark Goldin" <ma********@com cast.net> wrote in message
news:eH******** ********@TK2MSF TNGP12.phx.gbl. ..

I have main aspx page with a number of user controls.
How can I create a global property that will be visible in every user
control?

Thanks

[Karl]

Yes,
Your problem statement didn't mention that.

If you need this from multiple page, the best solution is to make them
implement an interface and cast the page to said interface...if this is what
you need, lemme know.

Karl

"Greg Burns" <greg_burns@DON T_SPAM_ME_hotma il.com> wrote in message
news:uD******** ******@TK2MSFTN GP14.phx.gbl...

Karl,

This is quite interesting. But something doesn't seem right to me. A
usercontrol can be placed on any page. Won't this cause problems if you try and cast the Page object it is "hosted" in to a specific class?

Problems may not be the right word. Shouldn't you do some sort of test to
be sure Page is of the correct type before casting?

If TypeOf (Page) Is WebForm1 Then
dim pageValue as string = ctype(Page, WebForm1).MyVal ue
End If

Greg

"Karl" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net> wrote in
message news:ew******** ********@TK2MSF TNGP14.phx.gbl. ..

create a public property

Say your page is of type WebForm1

Public Class WebForm1
inherits System.Web.UI.P age
private _myvalue as string = "SomeValue"
public readonly property MyValue() as string
get
return _myvalue
end get
end property

Sub Page Load...
...
End Sub

...
End class

In your user controls, you can access MyValue via:

dim pageValue as string = ctype(Page, WebForm1).MyVal ue
Every user control has access to the Page, and by casting it to the

specific

type, you have access to it's public property/methods..

Karl
"Mark Goldin" <ma********@com cast.net> wrote in message
news:eH******** ********@TK2MSF TNGP12.phx.gbl. ..

I have main aspx page with a number of user controls.
How can I create a global property that will be visible in every user
control?

Thanks

[Karl]

Sorry Greg,..just realized you aren't the one who asked the original
question ... :)

Karl
"Greg Burns" <greg_burns@DON T_SPAM_ME_hotma il.com> wrote in message
news:uD******** ******@TK2MSFTN GP14.phx.gbl...

Karl,

This is quite interesting. But something doesn't seem right to me. A
usercontrol can be placed on any page. Won't this cause problems if you try and cast the Page object it is "hosted" in to a specific class?

Problems may not be the right word. Shouldn't you do some sort of test to
be sure Page is of the correct type before casting?

If TypeOf (Page) Is WebForm1 Then
dim pageValue as string = ctype(Page, WebForm1).MyVal ue
End If

Greg

"Karl" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net> wrote in
message news:ew******** ********@TK2MSF TNGP14.phx.gbl. ..

create a public property

Say your page is of type WebForm1

Public Class WebForm1
inherits System.Web.UI.P age
private _myvalue as string = "SomeValue"
public readonly property MyValue() as string
get
return _myvalue
end get
end property

Sub Page Load...
...
End Sub

...
End class

In your user controls, you can access MyValue via:

dim pageValue as string = ctype(Page, WebForm1).MyVal ue
Every user control has access to the Page, and by casting it to the

specific

type, you have access to it's public property/methods..

Karl
"Mark Goldin" <ma********@com cast.net> wrote in message
news:eH******** ********@TK2MSF TNGP12.phx.gbl. ..

I have main aspx page with a number of user controls.
How can I create a global property that will be visible in every user
control?

Thanks

[Greg Burns]

Ah, but I would love to see how to do that (the interface design) if you get
a chance. I have an app that utilizes a few user controls across a couple
of webforms. They all need to share the same state. My current method is
extremely ugly. I've made all the user controls have a public property (say
MySettings). In the page load I initialize all the usercontrols MySettings
properties to match the Page's MySettings. Every time there is a change, I
resync all the usercontrols (by raising custom events registered in the
hosting Page). It is very ugly as you can imagine.

I probably should have just shoved MySettings into a Session variable, but I
was trying to keep everything in ViewState instead. (Not sure I am made the
right decision here)

It is very interesting to me to be able to read a common property from the
hosting page directly. My problem is, like I mentioned, my usercontrols are
spread across mutliple webforms and doing a Select Case on a TypeOf seems
uglier yet.

Greg
"Karl" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net> wrote in
message news:e4******** *******@tk2msft ngp13.phx.gbl.. .

Sorry Greg,..just realized you aren't the one who asked the original
question ... :)

Karl
"Greg Burns" <greg_burns@DON T_SPAM_ME_hotma il.com> wrote in message
news:uD******** ******@TK2MSFTN GP14.phx.gbl...

Karl,

This is quite interesting. But something doesn't seem right to me. A
usercontrol can be placed on any page. Won't this cause problems if you

try

and cast the Page object it is "hosted" in to a specific class?

Problems may not be the right word. Shouldn't you do some sort of test to be sure Page is of the correct type before casting?

If TypeOf (Page) Is WebForm1 Then
dim pageValue as string = ctype(Page, WebForm1).MyVal ue
End If

Greg

"Karl" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net> wrote in message news:ew******** ********@TK2MSF TNGP14.phx.gbl. ..

create a public property

Say your page is of type WebForm1

Public Class WebForm1
inherits System.Web.UI.P age
private _myvalue as string = "SomeValue"
public readonly property MyValue() as string
get
return _myvalue
end get
end property

Sub Page Load...
...
End Sub

...
End class

In your user controls, you can access MyValue via:

dim pageValue as string = ctype(Page, WebForm1).MyVal ue
Every user control has access to the Page, and by casting it to the

specific

type, you have access to it's public property/methods..

Karl
"Mark Goldin" <ma********@com cast.net> wrote in message
news:eH******** ********@TK2MSF TNGP12.phx.gbl. ..
> I have main aspx page with a number of user controls.
> How can I create a global property that will be visible in every user > control?
>
> Thanks
>
>

[Karl]

You can either do it with a base page or an interface.

Public Interface ISettings
ReadOnly Property Settings() As Hashtable
End Interface

your pages:

Public Class TestPage
Inherits Page
Implements ISettings

private _settings as Hashtable
Public ReadOnly Property Settings() As Hashtable Implements
ISettings.Setti ngs
Get
return _settings
End Get
End Property
...
End Class

Public Class TestPage2
Inherits Page
Implements ISettings

private _settings as Hashtable
Public ReadOnly Property Settings() As Hashtable Implements
ISettings.Setti ngs
Get
return _settings
End Get
End Property
...
End Class

your user control:

if typeof (Page) is ISettings then
settings = ctype(Page, ISettings).Sett ings
end if
Is that what you wanted?

Karl

"Greg Burns" <greg_burns@DON T_SPAM_ME_hotma il.com> wrote in message
news:eZ******** ******@TK2MSFTN GP09.phx.gbl...

Ah, but I would love to see how to do that (the interface design) if you get a chance. I have an app that utilizes a few user controls across a couple
of webforms. They all need to share the same state. My current method is
extremely ugly. I've made all the user controls have a public property (say MySettings). In the page load I initialize all the usercontrols MySettings properties to match the Page's MySettings. Every time there is a change, I resync all the usercontrols (by raising custom events registered in the
hosting Page). It is very ugly as you can imagine.

I probably should have just shoved MySettings into a Session variable, but I was trying to keep everything in ViewState instead. (Not sure I am made the right decision here)

It is very interesting to me to be able to read a common property from the
hosting page directly. My problem is, like I mentioned, my usercontrols are spread across mutliple webforms and doing a Select Case on a TypeOf seems
uglier yet.

Greg
"Karl" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net> wrote in
message news:e4******** *******@tk2msft ngp13.phx.gbl.. .

Sorry Greg,..just realized you aren't the one who asked the original
question ... :)

Karl
"Greg Burns" <greg_burns@DON T_SPAM_ME_hotma il.com> wrote in message
news:uD******** ******@TK2MSFTN GP14.phx.gbl...

Karl,

This is quite interesting. But something doesn't seem right to me. A
usercontrol can be placed on any page. Won't this cause problems if

you

try

and cast the Page object it is "hosted" in to a specific class?

Problems may not be the right word. Shouldn't you do some sort of

test to be sure Page is of the correct type before casting?

If TypeOf (Page) Is WebForm1 Then
dim pageValue as string = ctype(Page, WebForm1).MyVal ue
End If

Greg

"Karl" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net> wrote in message news:ew******** ********@TK2MSF TNGP14.phx.gbl. ..
> create a public property
>
> Say your page is of type WebForm1
>
> Public Class WebForm1
> inherits System.Web.UI.P age
>
>
> private _myvalue as string = "SomeValue"
> public readonly property MyValue() as string
> get
> return _myvalue
> end get
> end property
>
> Sub Page Load...
> ...
> End Sub
>
> ...
> End class
>
> In your user controls, you can access MyValue via:
>
> dim pageValue as string = ctype(Page, WebForm1).MyVal ue
>
>
> Every user control has access to the Page, and by casting it to the
specific
> type, you have access to it's public property/methods..
>
> Karl
>
>
> "Mark Goldin" <ma********@com cast.net> wrote in message
> news:eH******** ********@TK2MSF TNGP12.phx.gbl. ..
> > I have main aspx page with a number of user controls.
> > How can I create a global property that will be visible in every user > > control?
> >
> > Thanks
> >
> >
>
>

[Greg Burns]

I believe so. Thanks!

Greg

Is that what you wanted?

Karl

[Mark Goldin]

How do I reference such a property from a user control?

"Karl" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net> wrote in
message news:ew******** ******@TK2MSFTN GP14.phx.gbl...

create a public property

Say your page is of type WebForm1

Public Class WebForm1
inherits System.Web.UI.P age
private _myvalue as string = "SomeValue"
public readonly property MyValue() as string
get
return _myvalue
end get
end property

Sub Page Load...
...
End Sub

...
End class

In your user controls, you can access MyValue via:

dim pageValue as string = ctype(Page, WebForm1).MyVal ue
Every user control has access to the Page, and by casting it to the specific type, you have access to it's public property/methods..

Karl
"Mark Goldin" <ma********@com cast.net> wrote in message
news:eH******** ********@TK2MSF TNGP12.phx.gbl. ..

I have main aspx page with a number of user controls.
How can I create a global property that will be visible in every user
control?

Thanks

[Greg Burns]

In your usercontrol, you just do like Karl says:

dim pageValue as string = ctype(Page, WebForm1).MyVal ue

where MyValue is a property of your WebForm1 class

Now, if you go the extra mile and make your WebForm1 implement an interface
(says ISettings), then you can do this:

dim pageValue as string = ctype(Page, ISettings).MyVa lue

Which is more generic and useful.

Let me know if you need more help. Not sure about the language barrier.
(I'm a VB'er)
Greg
"Mark Goldin" <ma********@com cast.net> wrote in message
news:OT******** ******@TK2MSFTN GP11.phx.gbl...

How do I reference such a property from a user control?

"Karl" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net> wrote in
message news:ew******** ******@TK2MSFTN GP14.phx.gbl...

create a public property

Say your page is of type WebForm1

Public Class WebForm1
inherits System.Web.UI.P age
private _myvalue as string = "SomeValue"
public readonly property MyValue() as string
get
return _myvalue
end get
end property

Sub Page Load...
...
End Sub

...
End class

In your user controls, you can access MyValue via:

dim pageValue as string = ctype(Page, WebForm1).MyVal ue
Every user control has access to the Page, and by casting it to the

specific

type, you have access to it's public property/methods..

Karl
"Mark Goldin" <ma********@com cast.net> wrote in message
news:eH******** ********@TK2MSF TNGP12.phx.gbl. ..

> I have main aspx page with a number of user controls.
> How can I create a global property that will be visible in every user
> control?
>
> Thanks
>
>