is there a way to refer to public properties in other user controls

  • Thread starter Thread starter Web Search Store
  • Start date Start date
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Web Search Store

Hello,

I set up a web page with 2 user controls.

In classic asp, the first one did all the declarations, and the second one
used the values, and could reset it.

In ASP.Net so far I can't see how to relate them so this will work.

This user control defines the properties:



<%@ Control ClassName="topdcl" %>

<script language="vb" runat="server">


Private m_addressesstring as String= "adr,phone,zip,"

Public Property addressesstring() As String


Get

Return m_addressesstring

End Get

Set(ByVal value As String)

m_addressesstring = Value

End Set

End Property


Public Sub topdcl1()


addressesstring= "adr,phone,zip,"


End Sub

</script>





This user control tries to access the public property 'addressstring', but
can't:



<%@ Control ClassName="w" %>

<script language="vb" runat="server">

Public Sub w1()


my_topdcl.addressesstring = addressesstring & ",zip"


End Sub

</script>



Here's the page that calls them:



<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb"
Inherits="_Default" %>

<%@ Register TagPrefix="Utils" TagName="topdcl" Src="utils/topdcl_try.ascx"
%>

<%@ Register TagPrefix="Utils" TagName="w" Src="utils/w_try.ascx" %>




<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

<title>Untitled Page</title>

</head>

<body>


<form id="form1" runat="server">

<div>


</div>

</form>



<Utils:topdcl id="My_topdcl" runat="server"/>

<Utils:w id="My_w" runat="server"/>


</body>

</html>



Here's the code behind for this page:



Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Handles Me.Load

My_topdcl.topdcl1()

My_w.w1()


End Sub

I would really appreciate any help.

At this point, my only working solution seems to be to combine all the code
into 1 usercontrol, instead of having several. Then variables can refer to
variables in their own class with no problem.



In classic asp, I used includes with all the 'dim' statements in the first,
and the subroutines in later includes.



Thanks.



Scott Baxter.
 
Hello,

I set up a web page with 2 user controls.

In classic asp, the first one did all the declarations, and the second one
used the values, and could reset it.

In ASP.Net so far I can't see how to relate them so this will work.

This user control defines the properties:

<%@ Control ClassName="topdcl" %>

<script language="vb" runat="server">

Private m_addressesstring as String= "adr,phone,zip,"

Public Property addressesstring() As String

Get

Return m_addressesstring

End Get

Set(ByVal value As String)

m_addressesstring = Value

End Set

End Property

Public Sub topdcl1()

addressesstring= "adr,phone,zip,"

End Sub

</script>

This user control tries to access the public property 'addressstring', but
can't:

<%@ Control ClassName="w" %>

<script language="vb" runat="server">

Public Sub w1()

my_topdcl.addressesstring = addressesstring & ",zip"

End Sub

</script>

Here's the page that calls them:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb"
Inherits="_Default" %>

<%@ Register TagPrefix="Utils" TagName="topdcl" Src="utils/topdcl_try.ascx"
%>

<%@ Register TagPrefix="Utils" TagName="w" Src="utils/w_try.ascx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

<title>Untitled Page</title>

</head>

<body>

<form id="form1" runat="server">

<div>

</div>

</form>

<Utils:topdcl id="My_topdcl" runat="server"/>

<Utils:w id="My_w" runat="server"/>

</body>

</html>

Here's the code behind for this page:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Handles Me.Load

My_topdcl.topdcl1()

My_w.w1()

 End Sub

 I would really appreciate any help.

At this point, my only working solution seems to be to combine all the code
into 1 usercontrol, instead of having several.  Then variables can referto
variables in their own class with no problem.

In classic asp, I used includes with all the 'dim' statements in the first,
and the subroutines in later includes.

Thanks.

Scott Baxter.
Click to expand...

Dear Scott

Forget classic asp

ASP.NET is an entirely different platform. It is not merely an
extension of ASP and inherits practically nothing from it. VB.NET is
not the same as the VB used in ASP.

If you want re-usable code or global variables that are not integral
to any visual controls then create them in a separate .vb code file
and store it in the APP_CODE folder of the web site. Any namespaces or
classes created there will be within scope of all pages without the
need for include directives.

User controls are for re-usable visual controls and layouts. They are
not designed to act as an application-wide repository for code.
Anything contained within them that is publicly scoped is accessible
only from a host page that contains an instance of it. For example if
a page has an instance of topdcl placed on it (there can be as many of
them as you like) it will have a unique identifier e.g. topdcl1 The
property named "addressesstring" then becomes topdcl1.addressstring.
It will not be accessible from any other user control either within
the same or a different page, furthermore the value is only relevent
to that particular instance of topdcl.

HTH
 
Thank you for that insight.

I'll try putting a class in the app_code folder and see if I can get what I
want.

I'm fully aware that classic .asp is a totally different story. I'm just
trying to accomplish what I used to be able to do there.

Anyway. I'll give it a try.

Thanks.

Scott
Hello,

I set up a web page with 2 user controls.

In classic asp, the first one did all the declarations, and the second one
used the values, and could reset it.

In ASP.Net so far I can't see how to relate them so this will work.

This user control defines the properties:

<%@ Control ClassName="topdcl" %>

<script language="vb" runat="server">

Private m_addressesstring as String= "adr,phone,zip,"

Public Property addressesstring() As String

Get

Return m_addressesstring

End Get

Set(ByVal value As String)

m_addressesstring = Value

End Set

End Property

Public Sub topdcl1()

addressesstring= "adr,phone,zip,"

End Sub

</script>

This user control tries to access the public property 'addressstring', but
can't:

<%@ Control ClassName="w" %>

<script language="vb" runat="server">

Public Sub w1()

my_topdcl.addressesstring = addressesstring & ",zip"

End Sub

</script>

Here's the page that calls them:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb"
Inherits="_Default" %>

<%@ Register TagPrefix="Utils" TagName="topdcl"
Src="utils/topdcl_try.ascx"
%>

<%@ Register TagPrefix="Utils" TagName="w" Src="utils/w_try.ascx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

<title>Untitled Page</title>

</head>

<body>

<form id="form1" runat="server">

<div>

</div>

</form>

<Utils:topdcl id="My_topdcl" runat="server"/>

<Utils:w id="My_w" runat="server"/>

</body>

</html>

Here's the code behind for this page:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArgs)
Handles Me.Load

My_topdcl.topdcl1()

My_w.w1()

End Sub

I would really appreciate any help.

At this point, my only working solution seems to be to combine all the
code
into 1 usercontrol, instead of having several. Then variables can refer to
variables in their own class with no problem.

In classic asp, I used includes with all the 'dim' statements in the
first,
and the subroutines in later includes.

Thanks.

Scott Baxter.
Click to expand...

Dear Scott

Forget classic asp

ASP.NET is an entirely different platform. It is not merely an
extension of ASP and inherits practically nothing from it. VB.NET is
not the same as the VB used in ASP.

If you want re-usable code or global variables that are not integral
to any visual controls then create them in a separate .vb code file
and store it in the APP_CODE folder of the web site. Any namespaces or
classes created there will be within scope of all pages without the
need for include directives.

User controls are for re-usable visual controls and layouts. They are
not designed to act as an application-wide repository for code.
Anything contained within them that is publicly scoped is accessible
only from a host page that contains an instance of it. For example if
a page has an instance of topdcl placed on it (there can be as many of
them as you like) it will have a unique identifier e.g. topdcl1 The
property named "addressesstring" then becomes topdcl1.addressstring.
It will not be accessible from any other user control either within
the same or a different page, furthermore the value is only relevent
to that particular instance of topdcl.

HTH
 
Hello,

Sorry to be so dense. I have been reading about the App_code folder and
trying to put a class in there with a global variable.

Here's what I have:

in a file globals.vb:

Partial Class allofthem

Public ccc As String = "howdy"

End Class



Then, I rightclicked the project, and added existing item, and added this
file, which is in the app_code folder. But the project doesn't seem to know
about it.

What do I do next? My project didn't have an app_code folder, I created it
manually.



Do I need to put an 'inherit' or import statement in?



any help would be appreciated.

scott





Hello,

I set up a web page with 2 user controls.

In classic asp, the first one did all the declarations, and the second one
used the values, and could reset it.

In ASP.Net so far I can't see how to relate them so this will work.

This user control defines the properties:

<%@ Control ClassName="topdcl" %>

<script language="vb" runat="server">

Private m_addressesstring as String= "adr,phone,zip,"

Public Property addressesstring() As String

Get

Return m_addressesstring

End Get

Set(ByVal value As String)

m_addressesstring = Value

End Set

End Property

Public Sub topdcl1()

addressesstring= "adr,phone,zip,"

End Sub

</script>

This user control tries to access the public property 'addressstring', but
can't:

<%@ Control ClassName="w" %>

<script language="vb" runat="server">

Public Sub w1()

my_topdcl.addressesstring = addressesstring & ",zip"

End Sub

</script>

Here's the page that calls them:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb"
Inherits="_Default" %>

<%@ Register TagPrefix="Utils" TagName="topdcl"
Src="utils/topdcl_try.ascx"
%>

<%@ Register TagPrefix="Utils" TagName="w" Src="utils/w_try.ascx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

<title>Untitled Page</title>

</head>

<body>

<form id="form1" runat="server">

<div>

</div>

</form>

<Utils:topdcl id="My_topdcl" runat="server"/>

<Utils:w id="My_w" runat="server"/>

</body>

</html>

Here's the code behind for this page:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArgs)
Handles Me.Load

My_topdcl.topdcl1()

My_w.w1()

End Sub

I would really appreciate any help.

At this point, my only working solution seems to be to combine all the
code
into 1 usercontrol, instead of having several. Then variables can refer to
variables in their own class with no problem.

In classic asp, I used includes with all the 'dim' statements in the
first,
and the subroutines in later includes.

Thanks.

Scott Baxter.
Click to expand...

Dear Scott

Forget classic asp

ASP.NET is an entirely different platform. It is not merely an
extension of ASP and inherits practically nothing from it. VB.NET is
not the same as the VB used in ASP.

If you want re-usable code or global variables that are not integral
to any visual controls then create them in a separate .vb code file
and store it in the APP_CODE folder of the web site. Any namespaces or
classes created there will be within scope of all pages without the
need for include directives.

User controls are for re-usable visual controls and layouts. They are
not designed to act as an application-wide repository for code.
Anything contained within them that is publicly scoped is accessible
only from a host page that contains an instance of it. For example if
a page has an instance of topdcl placed on it (there can be as many of
them as you like) it will have a unique identifier e.g. topdcl1 The
property named "addressesstring" then becomes topdcl1.addressstring.
It will not be accessible from any other user control either within
the same or a different page, furthermore the value is only relevent
to that particular instance of topdcl.

HTH
 
Hello,

Sorry to be so dense.  I have been reading about the App_code folder and
trying to put a class in there with a global variable.

Here's what I have:

in a file globals.vb:

Partial Class allofthem

Public ccc As String = "howdy"

End Class

Then, I rightclicked the project, and added existing item, and added this
file, which is in the app_code folder.  But the project doesn't seem to know
about it.

What do I do next?  My project didn't have an app_code folder, I createdit
manually.

Do I need to put an 'inherit' or import statement in?

any help would be appreciated.

scott
Click to expand...

Hi

I've tried the same scenario as you and in the same manner but
everything seems to work fine. (There is no need for any specific
import or inherit statement)

Just as a check. Did you create an ordinary web page and try some code
along the following lines (in say the Page_Load event):

Dim aot As New allofthem
Response.Write(aot.ccc)

BTW the App_Code folder can be added to the site by right-clicking the
root of the site in Solution Explorer and choosing the option:

"Add ASP.NET folder" --> App_Code

One other tip. If you add the modifier "Shared" there is no need to
create an instance of the class to access publicly scoped variables
e.g.

Public Shared AString = "some text"

Then the content of Astring can be accesses in one line thus:

Response.Write(allofthem.AString)

Stan
 
Hello again:

I've just spotted the mistake.

Your class declaration needs to have the "public" attribute as well
thus:

Public Class allofthem

....

Stan

(P.S. the attribute "Partial" is to allow Class code to be spread over
more than one file.)
 
Thanks.

I'll try what you have said.

Scott
Hello,

Sorry to be so dense. I have been reading about the App_code folder and
trying to put a class in there with a global variable.

Here's what I have:

in a file globals.vb:

Partial Class allofthem

Public ccc As String = "howdy"

End Class

Then, I rightclicked the project, and added existing item, and added this
file, which is in the app_code folder. But the project doesn't seem to
know
about it.

What do I do next? My project didn't have an app_code folder, I created it
manually.

Do I need to put an 'inherit' or import statement in?

any help would be appreciated.

scott
Click to expand...

Hi

I've tried the same scenario as you and in the same manner but
everything seems to work fine. (There is no need for any specific
import or inherit statement)

Just as a check. Did you create an ordinary web page and try some code
along the following lines (in say the Page_Load event):

Dim aot As New allofthem
Response.Write(aot.ccc)

BTW the App_Code folder can be added to the site by right-clicking the
root of the site in Solution Explorer and choosing the option:

"Add ASP.NET folder" --> App_Code

One other tip. If you add the modifier "Shared" there is no need to
create an instance of the class to access publicly scoped variables
e.g.

Public Shared AString = "some text"

Then the content of Astring can be accesses in one line thus:

Response.Write(allofthem.AString)

Stan
 
Hello,

I think you finally hit on what I needed. Thanks a lot. I have some user
controls that I want to refer to some public arrays, without having to
instantiate a new version of them each time. This class:

Imports Microsoft.VisualBasic

Public Class Try2

Public Shared ihope As String = "whoknows"

End Class

in the 'App_Code' folder seems to do what I need.



I can refer to the variable ihope in the page_load like this:



response.write (try2.ihope)



Also, I can refer to it in my usercontrol like this:



<%@ Control ClassName="w" %>

helloooo

<script language="vb" runat="server">

Public Sub w1()

Response.Write("again" & Try2.ihope)

End Sub

</script>

I think this will accomplish what I want, without a lot of extra property
declarations and all that.



I will see.



Thanks.



Scott

Hello,

Sorry to be so dense. I have been reading about the App_code folder and
trying to put a class in there with a global variable.

Here's what I have:

in a file globals.vb:

Partial Class allofthem

Public ccc As String = "howdy"

End Class

Then, I rightclicked the project, and added existing item, and added this
file, which is in the app_code folder. But the project doesn't seem to
know
about it.

What do I do next? My project didn't have an app_code folder, I created it
manually.

Do I need to put an 'inherit' or import statement in?

any help would be appreciated.

scott
Click to expand...

Hi

I've tried the same scenario as you and in the same manner but
everything seems to work fine. (There is no need for any specific
import or inherit statement)

Just as a check. Did you create an ordinary web page and try some code
along the following lines (in say the Page_Load event):

Dim aot As New allofthem
Response.Write(aot.ccc)

BTW the App_Code folder can be added to the site by right-clicking the
root of the site in Solution Explorer and choosing the option:

"Add ASP.NET folder" --> App_Code

One other tip. If you add the modifier "Shared" there is no need to
create an instance of the class to access publicly scoped variables
e.g.

Public Shared AString = "some text"

Then the content of Astring can be accesses in one line thus:

Response.Write(allofthem.AString)

Stan
 
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