"Huber Peter" <hupe@aabbcc.com> wrote in message
news:3c7ff$456dbddc$54496b8a$4819@news.hispeed.ch...
> hello
>
> when I enter data into a bound control, but the datasource has no items,
> the
> data is not saved anywhere and lost. How can I avoid someone can enter
> some
> data into an bound control, what is not positioned to an vaild current
> field
> in the datasource.
>

> thnaks
>
>

On Nov 30, 6:21 pm, "Bart Mermuys" <bmermuys.nos...@hotmail.com> wrote:
> Hi,
>
> "Huber Peter" <h...@aabbcc.com> wrote in messagenews:3c7ff$456dbddc$54496b8a$4819@news.hispeed.ch...
>
> > hello
>
> > when I enter data into a bound control, but the datasource has no items,
> > the
> > data is not saved anywhere and lost. How can I avoid someone can enter
> > some
> > data into an bound control, what is not positioned to an vaild current
> > field
> > in the datasource.* If you have a BindingSource then attach an eventhandler to
> BindingSource.PositionChanged, when Position is -1 then disable the Controls
> otherwise enable them, eg. :
>
> bindingSource.PositionChanged += new
> EventHandler(bindingSource_PositionChanged);
>
> private void bindingSource_PositionChanged( object sender, EventArgs e )
> {
> bool enabled = (bindingSource.Position != - 1);
> textBox1.Enabled = enabled;
> textBox2.Enabled = enabled;
>
> }* If you can put your Controls inside a Panel or GroupBox then you only need
> to disable the Panel/GroupBox.
>
> * If you don't have a BindingSource, then you can use the PositionChanged
> event and Position property on the CurrencyManager which you can get from
> the BindingContext.
>
> HTH,
> Greetings
>
> > thnaks