Need help with accessing control in inherited form

[Joe]

Hello All:

I have two webforms (WebForm1.aspx and WebForm2.aspx) that inherit from
BasePage.aspx. BasePage.aspx inherits System.Web.UI.Page and has one hidden
field (hdnSessionId) that I want to use to cache a value that the web app
needs. I can not use Session, ViewState or QueryString to cache this value
(client requirement). The hidden field is dimmed in the BasePage.aspx.vb
code-behind as Protected WithEvents hdnFormSessionId As
System.Web.UI.HtmlControls.HtmlInputHidden.

Here's my question: How do I reference hdnSessionId from within
WebForm1.aspx and WebForm2.aspx (the child forms that inherit BasePage.aspx)?

Any help would be appreciated.

TIA,
--
Joe

[Karl Seguin [MVP]]

If it's protected, you should be able to reference it simply by name.
Protected members, unlike private ones, are available to child-class (the
point of protected).

Karl

"Joe" <Jo*@discussions.microsoft.com> wrote in message
news:8B**********************************@microsof t.com...

Hello All:

I have two webforms (WebForm1.aspx and WebForm2.aspx) that inherit from
BasePage.aspx. BasePage.aspx inherits System.Web.UI.Page and has one
hidden
field (hdnSessionId) that I want to use to cache a value that the web app
needs. I can not use Session, ViewState or QueryString to cache this
value
(client requirement). The hidden field is dimmed in the BasePage.aspx.vb
code-behind as Protected WithEvents hdnFormSessionId As
System.Web.UI.HtmlControls.HtmlInputHidden.

Here's my question: How do I reference hdnSessionId from within
WebForm1.aspx and WebForm2.aspx (the child forms that inherit
BasePage.aspx)?

Any help would be appreciated.

TIA,
--
Joe

[Joe]

Hi Karl,

Maybe you can help me understand something:

In BasePage.aspx I have an hidden field defined in the HTML as

<INPUT id="hdnSessionId" type="hidden" name="hdnSessionId" runat="server">.

I have an idetical declaration in WebForm1.aspx's HTML.

In BasePage,aspx's code-behind I have declared Protected WithEvents
hdnFormSessionId As System.Web.UI.HtmlControls.HtmlInputHidden. There is no
such declaration in WebForm1.aspx's code-behind.

When I run the code and populate WebForm1.aspx's hidden field, I see the
same value in BasePage.aspx's hidden field (checking with
Ctype(MyBase.FindControl("Form1").FindControl("hdn SessionId"),
HtmlInputHidden).Value in the immediate window). But I see the value without
explicitly populating the hidden field in BasePage.aspx. I don't understand
this.

Do you understand this? Why would I see this behavior?

--
Joe
"Karl Seguin [MVP]" wrote:

If it's protected, you should be able to reference it simply by name.
Protected members, unlike private ones, are available to child-class (the
point of protected).

Karl

"Joe" <Jo*@discussions.microsoft.com> wrote in message
news:8B**********************************@microsof t.com...

Hello All:

I have two webforms (WebForm1.aspx and WebForm2.aspx) that inherit from
BasePage.aspx. BasePage.aspx inherits System.Web.UI.Page and has one
hidden
field (hdnSessionId) that I want to use to cache a value that the web app
needs. I can not use Session, ViewState or QueryString to cache this
value
(client requirement). The hidden field is dimmed in the BasePage.aspx.vb
code-behind as Protected WithEvents hdnFormSessionId As
System.Web.UI.HtmlControls.HtmlInputHidden.

Here's my question: How do I reference hdnSessionId from within
WebForm1.aspx and WebForm2.aspx (the child forms that inherit
BasePage.aspx)?

Any help would be appreciated.

TIA,
--
Joe

[Karl Seguin [MVP]]

Base classes aren't ideal for representing visual elements. You should
consider using a MasterPage instead of your base page.
(http://www.metabuilders.com/Tools/MasterPages.aspx)
There's only 1 hidden field, so wherever you modify it, you'll see the value
reflected.

Karl
--
http://www.openmymind.net/
http://www.fuelindustries.com/
"Joe" <Jo*@discussions.microsoft.com> wrote in message
news:EB**********************************@microsof t.com...

Hi Karl,

Maybe you can help me understand something:

In BasePage.aspx I have an hidden field defined in the HTML as

<INPUT id="hdnSessionId" type="hidden" name="hdnSessionId"
runat="server">.

I have an idetical declaration in WebForm1.aspx's HTML.

In BasePage,aspx's code-behind I have declared Protected WithEvents
hdnFormSessionId As System.Web.UI.HtmlControls.HtmlInputHidden. There is
no
such declaration in WebForm1.aspx's code-behind.

When I run the code and populate WebForm1.aspx's hidden field, I see the
same value in BasePage.aspx's hidden field (checking with
Ctype(MyBase.FindControl("Form1").FindControl("hdn SessionId"),
HtmlInputHidden).Value in the immediate window). But I see the value
without
explicitly populating the hidden field in BasePage.aspx. I don't
understand
this.

Do you understand this? Why would I see this behavior?

--
Joe
"Karl Seguin [MVP]" wrote:

If it's protected, you should be able to reference it simply by name.
Protected members, unlike private ones, are available to child-class (the
point of protected).

Karl

"Joe" <Jo*@discussions.microsoft.com> wrote in message
news:8B**********************************@microsof t.com...

> Hello All:
>
> I have two webforms (WebForm1.aspx and WebForm2.aspx) that inherit from
> BasePage.aspx. BasePage.aspx inherits System.Web.UI.Page and has one
> hidden
> field (hdnSessionId) that I want to use to cache a value that the web
> app
> needs. I can not use Session, ViewState or QueryString to cache this
> value
> (client requirement). The hidden field is dimmed in the
> BasePage.aspx.vb
> code-behind as Protected WithEvents hdnFormSessionId As
> System.Web.UI.HtmlControls.HtmlInputHidden.
>
> Here's my question: How do I reference hdnSessionId from within
> WebForm1.aspx and WebForm2.aspx (the child forms that inherit
> BasePage.aspx)?
>
> Any help would be appreciated.
>
> TIA,
> --
> Joe