ListBox Control

[straydawg@hotmail.com]

Creating listbox for Role and initially populating with loop

myDataTable = myDataSet.Table s(1)
lbRole.Items.Cl ear()
Dim dataRow_t As DataRow
For Each dataRow_t In myDataTable.Row s
lbRole.Items.Ad d(dataRow_t("Ro le_Desc"))
Next dataRow_t
lbRole.Selected Index = -1

Thought I would try using binding

lbRole.Items.Cl ear()
lbRole.DisplayM ember = "role_desc"
lbRole.ValueMem ber = "role_id"
lbRole.DataSour ce = myDataSet.Table s(1)
lbRole.Selected Index = -1

When I use looping method, I am able to set lbRole.Selected Index = -1
so no value is selected for the listbox. When I try the same method for
the binding, I still get a value selected.

I would like to bind, but need to be able allow input with no role
selected.

Thanks in advance...

[Kerry Moorman]

RE: ListBox Control

Dawg,

Does setting it twice have the desired effect? For example:

lbRole.Selected Index = -1
lbRole.Selected Index = -1

Kerry Moorman


"straydawg@hotm ail.com" wrote:
[color=blue]
> Creating listbox for Role and initially populating with loop
>
> myDataTable = myDataSet.Table s(1)
> lbRole.Items.Cl ear()
> Dim dataRow_t As DataRow
> For Each dataRow_t In myDataTable.Row s
> lbRole.Items.Ad d(dataRow_t("Ro le_Desc"))
> Next dataRow_t
> lbRole.Selected Index = -1
>
> Thought I would try using binding
>
> lbRole.Items.Cl ear()
> lbRole.DisplayM ember = "role_desc"
> lbRole.ValueMem ber = "role_id"
> lbRole.DataSour ce = myDataSet.Table s(1)
> lbRole.Selected Index = -1
>
> When I use looping method, I am able to set lbRole.Selected Index = -1
> so no value is selected for the listbox. When I try the same method for
> the binding, I still get a value selected.
>
> I would like to bind, but need to be able allow input with no role
> selected.
>
> Thanks in advance...
>
>[/color]

[straydawg@hotmail.com]

Re: ListBox Control

Thanks Kerry...

Not really. I see the the value for the lbRole.Selected Index is -1, but
when looking at the listbox on the form, there still is a value
selected. ??

D

[Mythran]

Re: ListBox Control


<straydawg@hotm ail.com> wrote in message
news:1145996259 .082338.88460@i 40g2000cwc.goog legroups.com...[color=blue]
> Creating listbox for Role and initially populating with loop
>
> myDataTable = myDataSet.Table s(1)
> lbRole.Items.Cl ear()
> Dim dataRow_t As DataRow
> For Each dataRow_t In myDataTable.Row s
> lbRole.Items.Ad d(dataRow_t("Ro le_Desc"))
> Next dataRow_t
> lbRole.Selected Index = -1
>
> Thought I would try using binding
>
> lbRole.Items.Cl ear()
> lbRole.DisplayM ember = "role_desc"
> lbRole.ValueMem ber = "role_id"
> lbRole.DataSour ce = myDataSet.Table s(1)
> lbRole.Selected Index = -1
>
> When I use looping method, I am able to set lbRole.Selected Index = -1
> so no value is selected for the listbox. When I try the same method for
> the binding, I still get a value selected.
>
> I would like to bind, but need to be able allow input with no role
> selected.
>
> Thanks in advance...
>[/color]

In ASP.Net, we would, after the data bind, add a new item to the list (empty
item). Then you can set the SelectedValue/SelectedItem.

HTH,
Mythran

[Cor Ligthert [MVP]]

Re: ListBox Control

Sraydaw,

Is it not a little bit strange that when you bind a box in the listbox. You
want to bind one box to nothing, you can add an empty row in your datatable,
but that gives your mostly more problems than results.

Cor

<straydawg@hotm ail.com> schreef in bericht
news:1145996259 .082338.88460@i 40g2000cwc.goog legroups.com...[color=blue]
> Creating listbox for Role and initially populating with loop
>
> myDataTable = myDataSet.Table s(1)
> lbRole.Items.Cl ear()
> Dim dataRow_t As DataRow
> For Each dataRow_t In myDataTable.Row s
> lbRole.Items.Ad d(dataRow_t("Ro le_Desc"))
> Next dataRow_t
> lbRole.Selected Index = -1
>
> Thought I would try using binding
>
> lbRole.Items.Cl ear()
> lbRole.DisplayM ember = "role_desc"
> lbRole.ValueMem ber = "role_id"
> lbRole.DataSour ce = myDataSet.Table s(1)
> lbRole.Selected Index = -1
>
> When I use looping method, I am able to set lbRole.Selected Index = -1
> so no value is selected for the listbox. When I try the same method for
> the binding, I still get a value selected.
>
> I would like to bind, but need to be able allow input with no role
> selected.
>
> Thanks in advance...
>[/color]