RE: Master Detail Event Handling?

Hi Bernie,

I think that what you are attempting is possible to be done. If you post
the entire code of your datalist that contains those other controls I might
get a more accurate description of the challenge you face in completing your
design.
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com


"bernadou" wrote:

> Phillip,
> Hi again. Thanks for your continued assistance.
>
> I took a look at your example and I get it. It is slightly different than
> what I'm trying to do, but, maybe that is because what I'm trying to do isn't
> possible.
>
> Your example hides the child records unless the user clicks the parent row.
> I like this approach, but, it isn't the direction I was going to go. Your
> example allows the parent's selected row index to remain in memory which you
> then use to identify the child control to work with the child control events.
> All very slick.
>
> I'm unsuccessfully trying to figure out a way to show all the rows (parent
> and child) at the same time, and, somehow identify what button from the child
> row was clicked. I may have to just punt and use your approach, but, I'm
> wondering if your clearly deeper knowledge on the subject has a quick
> suggestion how this might be done.
>
> The crux of the matter is here....
>
> If the user clicks the button at the end of any of the many ChildRows in my
> output, the Parent's ItemIndexChanged event doesn't fire (nor has it ever
> fired which leaves the parent's item index as Nothing), just the ChildGrid's
> ItemIndexChanged fires (atleast based on my debugging attempts). So when I
> try this test, I get a Null ref runtime err from the code below:
>
>
> Protected Sub ChildGrid_SelectedIndexChanged(ByVal sender As Object, ByVal e
> As System.EventArgs)
>
> ParentList1.SelectedItem.FindControl("ChildGrid").Visible = False
>
>
> End Sub
>
> So the question is how to identify the Parent row without actually clicking
> the parent row first? (I suspect this isn't possible....)
>
> Thanks once again for your input, it has been extreemly valuable.
>
> Bernie
>
> "Phillip Williams" wrote:
>
> > I can suggest 2 ways:
> > 1- declaratively define the event handling method, e.g.
> > OnSelectedIndexChanged="ChildGridView1_SelectedIndexChanged" within the
> > markup of the grid
> > 2- dynamically, during handling any of the events of the parent control,
> > normally in your scenario it would be during the DataList.ItemCreated Event,
> > wire up the event handler to the desired event of the child control.
> >
> > To see a demo (with source code) that uses both methods (where the nested
> > controls are GridVeiw->GridVeiw->DetailsVeiw) you may review this demo:
> > http://www.webswapp.com/CodeSamples/aspnet20/GridView_1c.aspx
> >
> > --
> > HTH,
> > Phillip Williams
> > http://www.societopia.net
> > http://www.webswapp.com
> >
> >
> > "bernadou" wrote:
> >
> > > I’m trying to use the DataList and GridView to accomplish a Parent (or
> > > master), child type of display (I’ve got that part), but I can’t seem to
> > > figure out how to handle events for the child GridView. The display looks
> > > like this:
> > >
> > > Parent Record
> > > Child Record [button]
> > > Child Record [button]
> > > Parent Record
> > > Child Record [button]
> > >
> > > This was accomplished by dragging and dropping a grid view into the item
> > > template of the DataList that creates the Parent Record, and, setting the
> > > record source on the GridView using a where clause in the SQL that attaches
> > > to a field in the parent record. All that works great!
> > >
> > > Handling the events is killing me. Usually you can simply go to the code
> > > behind and use the dropdown boxes and VS2005 creates the appropriate event
> > > handlers for your control. In this case (and if you are with me this far you
> > > might already understand what I’m about to write…) there isn’t an option for
> > > the GridView that makes up my child records.
> > >
> > > This is all very strange and I think I understand part of what is happening.
> > > The GridView is now a control of the DataList control (right?), but how do I
> > > work with the click event of the buttons that are created. I’m stumped.
> > >
> > > Thanks for any insight you can provide.
> > >
> > > B
> > >
.