Combobox not refreshing when linking to dataset

[Simon Verona]

I have a combobox that is contained within a user control.

Whilst the application is running, I'm attaching the combobox to a new
dataset. The problem I'm getting is that the combobox doesn't appear to
reflect the new dataset. The same code seems to work fine if the combobox
is set to the dataset on initialisation. What have I done wrong?

The code in full that I'm using to update the dataset and attach to the
combobox is as follows (the object jtmp is a link to a properietary
database, but I can see it cycling through this correctly).

dct = jtmp.ExtractDA( LookupAmc).DCou nt(m_DmsControl .VM)dt = New DataTable
ds = New DataSet
dv = New DataView
dt.TableName = "Data"
dt.Columns.Add( "Id", System.Type.Get Type("System.St ring"), "")
dt.Columns.Add( "Descriptio n", System.Type.Get Type("System.St ring"), "")
ds.Tables.Add(d t)
dv = ds.Tables("Data ").DefaultV iew
Dim dr As DataRow
For cnt = 1 To dct
Try
If jtmp.Extract(m_ LookupAmc, cnt).StartsWith ("*") = False Then
Try
dr = dt.NewRow
dr.Item("Id") = cnt
dr.Item("Descri ption") = jtmp.Extract(m_ LookupAmc, cnt)
dt.Rows.Add(dr)
Catch
End Try
End If
Catch
End Try
Next cnt
dv.Sort = "Descriptio n"
txtLookup.Value Member = Nothing
txtLookup.DataS ource = Nothing
txtLookup.Displ ayMember = Nothing
txtLookup.Displ ayMember = "Descriptio n"
txtLookup.Value Member = "Id"
txtLookup.DataS ource = dv
txtLookup.Refre sh()
Any clues as to what I've done wrong?

Thanks in advance

Simon

[Cor Ligthert [MVP]]

Simon,

I think that you first of all have to remove all the code that you created
around your code to suppress the showing of all normal errors (without any
action at all).

Than the next problem can be done, however as you show it, have you
declared your usercontrol as bellow? Otherwise the code should not work in
my opinion or you should have created a lot of extra properties..

txtLookup as control
inherits Combobox

Is that true?

Cor

[Simon Verona]

The usercontrol inherits from System.Windows. Forms.UserContr ol - this is because the usercontrol also has a button on it as well.

I've put some traps in the "catch" areas of my try/catch/end try to make sure it's not hitting an error, which it doesn't appear to be.

I'm not sure why not inheriting from UserControl should in itself cause a problem, surely this is how the usercontrol is supposed to work?

Regards
Simon
"Cor Ligthert [MVP]" <no************ @planet.nl> wrote in message news:eO******** ******@TK2MSFTN GP11.phx.gbl...

Simon,

I think that you first of all have to remove all the code that you created
around your code to suppress the showing of all normal errors (without any
action at all).

Than the next problem can be done, however as you show it, have you
declared your usercontrol as bellow? Otherwise the code should not work in
my opinion or you should have created a lot of extra properties..

txtLookup as control
inherits Combobox

Is that true?

Cor