raise a bubble event.

[Lucifer]

Hi

I am trying to raise a bubble event.

I have a dropdownlist and a datalist in a datalist.

I want to use the postback from the dropdownlist to rebind the nested
datalist. But i need the event to be a datalist Command so i have
access to e.item for the main datalist

the aspx code

<asp:datalist id=PostageGroup s
OnSelectedIndex Changed="ddlGro upStatus_Select edIndexChanged"
AutoPostBack="T rue" ' etc...
<ItemTemplate >
'my dropdown for picking the status
'of the items to be listed in
<asp:dropdownli st id=ItemStatus ...
</asp:dropdownlis t>
'nested datalist
<asp:datalist id=PostageItems
'some more code...
</asp:datalist:as p>
</ItemTemplate>
</asp:datalist>

i am trying to catch the datalist PostageGroups postback for the
dropdownlist ItemStatus so i can rebind the rested datalist

the aspx.vb code:

Public Event Command As
System.Web.UI.W ebControls.Comm andEventHandler

Protected Overridable Sub OnCommand(ByVal e As
System.Web.UI.W ebControls.Comm andEventArgs, ByVal source As Object)

RaiseEvent Command(source, e)

RaiseBubbleEven t(source, e)

End Sub

Public Sub ddlGroupStatus_ SelectedIndexCh anged(ByVal sender As
Object, ByVal e As System.EventArg s)

OnCommand(New
System.Web.UI.W ebControls.Comm andEventArgs("D ropDown", CType(sender,
DropDownList).S electedValue), CType(sender, DropDownList))

End Sub

Private Sub PostageTypes_It emCommand(ByVal source As Object,
ByVal e As System.Web.UI.W ebControls.Data ListCommandEven tArgs) Handles
PostageTypes.It emCommand

If e.CommandName = "DropDown" Then

Dim GroupID As Integer =
CType(CType(e.I tem.FindControl ("lblDeliveryGr oupID"), Label).Text,
Integer)
Dim Status As Boolean =
CBool(CType(e.I tem.FindControl ("ddlGroupStatu s"),
DropDownList).S electedValue)
Dim myPostage As New Ecom_PostageDB

With CType(PostageTy pes.FindControl ("PostageList") ,
DataList)
..SelectedIndex = -1
..DataSource =
myPostage.GetPo stageItemsBySta tusAndGroup(Sta tus, GroupID)
..DataBind()
End With

End If

[Scott Allen]

Hi Lucifer,

When the DropDownList fires a SelectIndexchan ged event, the sender
parameter in the event handler will represent the DropDownList. You
can use the Parent property of the DropDownList to get back to the
DataListItem, and from there grab the nested DataList (perhaps with
FindControl).

I have two articles that could help you. They deal with DataGrid and
Repeaters, but the approach is the same.

DropDownList Controls In an ASP.Net DataGrid
http://odetocode.com/Articles/231.aspx

In Search Of ASP.NET Controls
http://www.odetocode.com/Articles/116.aspx

HTH,

--
Scott
http://www.OdeToCode.com/blogs/scott/

On 13 Oct 2004 07:34:13 -0700, "Lucifer" <rs******@zethi cs.com> wrote:

Hi

I am trying to raise a bubble event.

I have a dropdownlist and a datalist in a datalist.

I want to use the postback from the dropdownlist to rebind the nested
datalist. But i need the event to be a datalist Command so i have
access to e.item for the main datalist

the aspx code

<asp:datalis t id=PostageGroup s
OnSelectedInde xChanged="ddlGr oupStatus_Selec tedIndexChanged "
AutoPostBack=" True" ' etc...
<ItemTemplat e>
'my dropdown for picking the status
'of the items to be listed in
<asp:dropdownl ist id=ItemStatus ...
</asp:dropdownlis t>
'nested datalist
<asp:datalis t id=PostageItems
'some more code...
</asp:datalist:as p>
</ItemTemplate>
</asp:datalist>

i am trying to catch the datalist PostageGroups postback for the
dropdownlist ItemStatus so i can rebind the rested datalist

the aspx.vb code:

Public Event Command As
System.Web.UI. WebControls.Com mandEventHandle r

Protected Overridable Sub OnCommand(ByVal e As
System.Web.UI. WebControls.Com mandEventArgs, ByVal source As Object)

RaiseEvent Command(source, e)

RaiseBubbleEve nt(source, e)

End Sub

Public Sub ddlGroupStatus_ SelectedIndexCh anged(ByVal sender As
Object, ByVal e As System.EventArg s)

OnCommand(Ne w
System.Web.UI. WebControls.Com mandEventArgs(" DropDown", CType(sender,
DropDownList). SelectedValue), CType(sender, DropDownList))

End Sub

Private Sub PostageTypes_It emCommand(ByVal source As Object,
ByVal e As System.Web.UI.W ebControls.Data ListCommandEven tArgs) Handles
PostageTypes.I temCommand

If e.CommandName = "DropDown" Then

Dim GroupID As Integer =
CType(CType(e. Item.FindContro l("lblDeliveryG roupID"), Label).Text,
Integer)
Dim Status As Boolean =
CBool(CType(e. Item.FindContro l("ddlGroupStat us"),
DropDownList). SelectedValue)
Dim myPostage As New Ecom_PostageDB

With CType(PostageTy pes.FindControl ("PostageList") ,
DataList)
.SelectedInd ex = -1
.DataSource =
myPostage.GetP ostageItemsBySt atusAndGroup(St atus, GroupID)
.DataBind()
End With

End If