Show Blank value in Combo Box

I need to display a blank value as well as other values. I do not want to
alter any current records but just be able to display this blank value
amongst the list.
I have not been able to figure out how to do this in a combo box. Any help
will be greatly appreciated.

carlt@gicw.org

Lateralus
Thu Sep 02 23:01:04 CDT 2004

Carl, usually what I do is I'll add a new row to the view.


//assume ds is a dataset

DataRow myRow = ds.Tables[0].NewRow();
myRow[valueMember] = DBNull.Value;
myRow[displayMember] = "";
ds.Tables[0].Rows.InsertAt(myRow,0);

control.DataSource = ds.Tables[0].DefaultView;
control.DisplayMember = "DISPLAY_COLUMN_NAME";
control.ValueMember = "VALUE_COLUMN_NAME";

--
Lateralus [MCAD]


"CarlT" <CarlT@discussions.microsoft.com> wrote in message
news:8C38B571-7923-41A1-94CA-E73B8503A157@microsoft.com...
>I need to display a blank value as well as other values. I do not want to
> alter any current records but just be able to display this blank value
> amongst the list.
> I have not been able to figure out how to do this in a combo box. Any help
> will be greatly appreciated.
>
> carlt@gicw.org

Lateralus
Thu Sep 02 23:06:47 CDT 2004

Carl,
I think it's getting too late at night to be doing this. I'm making too
many typos....Anyway, here is the code from my previous post. It should be
OK now.

DataRow myRow = ds.Tables[0].NewRow();
myRow["VALUE_COLUMN_NAME"] = DBNull.Value;
myRow["DISPLAY_COLUMN_NAME"] = "";
ds.Tables[0].Rows.InsertAt(myRow,0);

control.DataSource = ds.Tables[0].DefaultView;
control.DisplayMember = "DISPLAY_COLUMN_NAME";
control.ValueMember = "VALUE_COLUMN_NAME";

--
Lateralus [MCAD]


"CarlT" <CarlT@discussions.microsoft.com> wrote in message
news:8C38B571-7923-41A1-94CA-E73B8503A157@microsoft.com...
>I need to display a blank value as well as other values. I do not want to
> alter any current records but just be able to display this blank value
> amongst the list.
> I have not been able to figure out how to do this in a combo box. Any help
> will be greatly appreciated.
>
> carlt@gicw.org

Joey
Fri Sep 03 01:40:44 CDT 2004

Follow up question:

I believe adding an empty row to the datatable to be bound to a combobox is
an ideal thing to do since without it, one need to add additional handling
on clearing a selection, etc. However until now, I haven't encountered any
tips about this issue, can you lighten me up.


"Lateralus [MCAD]" <dnorm252_at_yahoo.com> wrote in message
news:eHZV$sWkEHA.3400@TK2MSFTNGP14.phx.gbl...
> Carl,
> I think it's getting too late at night to be doing this. I'm making
too
> many typos....Anyway, here is the code from my previous post. It should be
> OK now.
>
> DataRow myRow = ds.Tables[0].NewRow();
> myRow["VALUE_COLUMN_NAME"] = DBNull.Value;
> myRow["DISPLAY_COLUMN_NAME"] = "";
> ds.Tables[0].Rows.InsertAt(myRow,0);
>
> control.DataSource = ds.Tables[0].DefaultView;
> control.DisplayMember = "DISPLAY_COLUMN_NAME";
> control.ValueMember = "VALUE_COLUMN_NAME";
>
> --
> Lateralus [MCAD]
>
>
> "CarlT" <CarlT@discussions.microsoft.com> wrote in message
> news:8C38B571-7923-41A1-94CA-E73B8503A157@microsoft.com...
> >I need to display a blank value as well as other values. I do not want to
> > alter any current records but just be able to display this blank value
> > amongst the list.
> > I have not been able to figure out how to do this in a combo box. Any
help
> > will be greatly appreciated.
> >
> > carlt@gicw.org
>
>