Unable to add SelectedIndexChanged event from code behind

[Shawn]

I have a DataGrid with only one TemplateColumn wich contains a DropDownList.
After I bind the DataGrid I fill the dropDownLists with values in
ItemDataBound. None of the DropDownLists contains the same values. Some of
these DropDownLists have AutoPostBack set to true, but I'm having trouble
adding the SelectedIndexChanged event to them. This is my code:
ddlParameterValue = dataGridItem.FindControl("ddlParameterValue")
ddlParameterValue.AutoPostBack = True
AddHandler ddlParameterValue.SelectedIndexChanged, New
System.EventHandler(AddressOf ddlParameterValue_SelectedIndexChanged)


Public Sub ddlParameterValue_SelectedIndexChanged(ByVal sender As Object,
ByVal e As System.EventArgs)
....
End Sub

I put a brakepoint on the method, but it never gets called. The
AutoPostBack part works fine.

Any ideas?

Shawn

 

[Patrick.O.Ige]

About this
Public Sub ddlParameterValue_SelectedIndexChanged(ByVal sender As
Object,ByVal e As System.EventArgs) DDL.SelectedIndexChanged
Patrick

 

[Damien]

I have a DataGrid with only one TemplateColumn wich contains a DropDownList.
After I bind the DataGrid I fill the dropDownLists with values in
ItemDataBound. None of the DropDownLists contains the same values. Some of
these DropDownLists have AutoPostBack set to true, but I'm having trouble
adding the SelectedIndexChanged event to them. This is my code:
ddlParameterValue = dataGridItem.FindControl("ddlParameterValue")
ddlParameterValue.AutoPostBack = True
AddHandler ddlParameterValue.SelectedIndexChanged, New
System.EventHandler(AddressOf ddlParameterValue_SelectedIndexChanged)


Public Sub ddlParameterValue_SelectedIndexChanged(ByVal sender As Object,
ByVal e As System.EventArgs)
...
End Sub

I put a brakepoint on the method, but it never gets called. The
AutoPostBack part works fine.

Any ideas?

Shawn

Hi Shawn,

1) When are you adding the event handler,
2) Are other events working?

Even if the control exists already on the page, I believe you'd have to
make sure you add the handler during each page request (i.e. not just
the first time inside a If Not IsPostback block)

Damien

 

[Shawn]

You were right, I had to add the handler during each page request.