User control reloads page data when webcontrol changes

[Matt Jensen]

Howdy all
Been searching and can't find a good answer to my problem.

I've got a usercontrol 'banner' at the top of my page, and when the
selection in the dropdown list changes I want the "host" webform/page to be
reload so the data on it (in repeaters) is reloaded using a new value from
the dropdownlist (and which btw is also stored in a session variable for
later use).

I'm not sure the best way to do this.
I could call a public method in the page class and try and repopulate this
but I'm not sure that with the .NET page
creation/initiation/render/whatever-the-correct-term-is order that this will
work, plus I can't get it to work anyhow (maybe I need to call the
InitializeCompo nent method generated by VS) but I don't really know what I'm
doing re this.

I've tried redirect the "host" page to itself but then I'm having problems
getting the dropdownlist to show the (just) selected value.

I was hoping there was a simple way to call the "host" page_load event from
the user control as this would make it much easier, but I'm not sure this
makes sense the in the .NET page load/creation order anyway. I read
something about delegates but I didn't really understand it and couldn't see
how to apply it to my case.

Any help would be greatly appreciated.
Cheers
Matt

[Santhi Maadhaven]

Matt,
Problem of urs will be solved by checking for IsPostBack and do logic
for binding data to ur repeater control.

"Matt Jensen" wrote:

Howdy all
Been searching and can't find a good answer to my problem.

I've got a usercontrol 'banner' at the top of my page, and when the
selection in the dropdown list changes I want the "host" webform/page to be
reload so the data on it (in repeaters) is reloaded using a new value from
the dropdownlist (and which btw is also stored in a session variable for
later use).

I'm not sure the best way to do this.
I could call a public method in the page class and try and repopulate this
but I'm not sure that with the .NET page
creation/initiation/render/whatever-the-correct-term-is order that this will
work, plus I can't get it to work anyhow (maybe I need to call the
InitializeCompo nent method generated by VS) but I don't really know what I'm
doing re this.

I've tried redirect the "host" page to itself but then I'm having problems
getting the dropdownlist to show the (just) selected value.

I was hoping there was a simple way to call the "host" page_load event from
the user control as this would make it much easier, but I'm not sure this
makes sense the in the .NET page load/creation order anyway. I read
something about delegates but I didn't really understand it and couldn't see
how to apply it to my case.

Any help would be greatly appreciated.
Cheers
Matt

[Matt Jensen]

Good point, I think I must be going insane at the moment...!
:-)
Matt

"Santhi Maadhaven" <Sa************ *@discussions.m icrosoft.com> wrote in
message news:D8******** *************** ***********@mic rosoft.com...

Matt,
Problem of urs will be solved by checking for IsPostBack and do logic
for binding data to ur repeater control.

"Matt Jensen" wrote:

Howdy all
Been searching and can't find a good answer to my problem.

I've got a usercontrol 'banner' at the top of my page, and when the
selection in the dropdown list changes I want the "host" webform/page to
be
reload so the data on it (in repeaters) is reloaded using a new value
from
the dropdownlist (and which btw is also stored in a session variable for
later use).

I'm not sure the best way to do this.
I could call a public method in the page class and try and repopulate
this
but I'm not sure that with the .NET page
creation/initiation/render/whatever-the-correct-term-is order that this
will
work, plus I can't get it to work anyhow (maybe I need to call the
InitializeCompo nent method generated by VS) but I don't really know what
I'm
doing re this.

I've tried redirect the "host" page to itself but then I'm having
problems
getting the dropdownlist to show the (just) selected value.

I was hoping there was a simple way to call the "host" page_load event
from
the user control as this would make it much easier, but I'm not sure this
makes sense the in the .NET page load/creation order anyway. I read
something about delegates but I didn't really understand it and couldn't
see
how to apply it to my case.

Any help would be greatly appreciated.
Cheers
Matt

[Matt Jensen]

Hmm, I think my problem is related to the order of a dropdownlist
selectindexchan ged event firing in relation to the page ispostback event.
Which fires first?
Cheers
Matt

"Santhi Maadhaven" <Sa************ *@discussions.m icrosoft.com> wrote in
message news:D8******** *************** ***********@mic rosoft.com...

Matt,
Problem of urs will be solved by checking for IsPostBack and do logic
for binding data to ur repeater control.

"Matt Jensen" wrote:

Howdy all
Been searching and can't find a good answer to my problem.

I've got a usercontrol 'banner' at the top of my page, and when the
selection in the dropdown list changes I want the "host" webform/page to
be
reload so the data on it (in repeaters) is reloaded using a new value
from
the dropdownlist (and which btw is also stored in a session variable for
later use).

I'm not sure the best way to do this.
I could call a public method in the page class and try and repopulate
this
but I'm not sure that with the .NET page
creation/initiation/render/whatever-the-correct-term-is order that this
will
work, plus I can't get it to work anyhow (maybe I need to call the
InitializeCompo nent method generated by VS) but I don't really know what
I'm
doing re this.

I've tried redirect the "host" page to itself but then I'm having
problems
getting the dropdownlist to show the (just) selected value.

I was hoping there was a simple way to call the "host" page_load event
from
the user control as this would make it much easier, but I'm not sure this
makes sense the in the .NET page load/creation order anyway. I read
something about delegates but I didn't really understand it and couldn't
see
how to apply it to my case.

Any help would be greatly appreciated.
Cheers
Matt

[Tomas Vera]

Matt,
What I've used a lot in the past

1. Ensure that your DropDownList control has "AutoPostBa ck = true"
set.
2. Create a handler for the SelectedIndexCh anged event from the
DropDownList.
3. In the handler add code that looks something like this

private void DropDownList1_S electedIndexCha nged(object sender,
System.EventArg s e)
{
// Get the selected value from the DDL
string selectedValue = DropDownList1.S electedValue;

// Call a function to update the repeaters with the
// the new value from the DDL control
UpdateRepeaters (selectedValue) ;
}

In this manner, you can use the postback event to udpate the repeaters
on your page.

Hope this helps.

-tomas
On Fri, 25 Nov 2005 15:22:06 -0000, "Matt Jensen"
<re************ ***@microsoft.c om> wrote:

Hmm, I think my problem is related to the order of a dropdownlist
selectindexcha nged event firing in relation to the page ispostback event.
Which fires first?
Cheers
Matt

"Santhi Maadhaven" <Sa************ *@discussions.m icrosoft.com> wrote in
message news:D8******** *************** ***********@mic rosoft.com...

Matt,
Problem of urs will be solved by checking for IsPostBack and do logic
for binding data to ur repeater control.

"Matt Jensen" wrote:

Howdy all
Been searching and can't find a good answer to my problem.

I've got a usercontrol 'banner' at the top of my page, and when the
selection in the dropdown list changes I want the "host" webform/page to
be
reload so the data on it (in repeaters) is reloaded using a new value
from
the dropdownlist (and which btw is also stored in a session variable for
later use).

I'm not sure the best way to do this.
I could call a public method in the page class and try and repopulate
this
but I'm not sure that with the .NET page
creation/initiation/render/whatever-the-correct-term-is order that this
will
work, plus I can't get it to work anyhow (maybe I need to call the
InitializeCompo nent method generated by VS) but I don't really know what
I'm
doing re this.

I've tried redirect the "host" page to itself but then I'm having
problems
getting the dropdownlist to show the (just) selected value.

I was hoping there was a simple way to call the "host" page_load event
from
the user control as this would make it much easier, but I'm not sure this
makes sense the in the .NET page load/creation order anyway. I read
something about delegates but I didn't really understand it and couldn't
see
how to apply it to my case.

Any help would be greatly appreciated.
Cheers
Matt