IsPostBack not true when clicking hyperlink column in a programmaticall y created datagrid

[TB]

Hi All

For reasons unknown to me, the Page.IsPostBack is always false when I
click a link in a hyperlink column of a datagrid which is created
programmaticall y.

My code in a page called list.aspx:
sub creategrid()
dim Mydatagrid as datagrid = New DataGrid
Mydatagrid.ID = "mydatagrid "
Mydatagrid.Page Size = "5"
Mydatagrid.Data KeyField = "ID"
Mydatagrid.Auto GenerateColumns = False

etc, etc, and then:

Dim myboundcolumn As BoundColumn
myboundcolumn = New BoundColumn
myboundcolumn.D ataField = "Name"
myboundcolumn.H eaderText = "Name"
myboundcolumn.I temStyle.Width = Unit.Pixel(40)
Mydatagrid.Colu mns.Add(mybound column)

Dim myhyperlinkcolu mn As HyperLinkColumn
myhyperlinkcolu mn = New HyperLinkColumn
myhyperlinkcolu mn.HeaderText = "View"
myhyperlinkcolu mn.DataNavigate UrlField = "ID"
myhyperlinkcolu mn.DataNavigate UrlFormatString =
"list.aspx?deta il={0}"
myhyperlinkcolu mn.Text = "View details"
Mydatagrid.Colu mns.Add(myhyper linkcolumn)
plhnews.Control s.Add(Mydatagri d) ' I add it to a placeholder control
on the page.

End sub

What do have to add to this code in order to ensure that IsPostback =
true when a link in the hyperlinkcolumn is clicked?

Thanks

TB