"Digital Slug" <DigitalSlugnospamalias@newsgroups.nospam> wrote in message
news:43C15731-E6C3-4189-851D-A0295166B41F@microsoft.com...
> Hello,
>
> When I navigate a table in a dataset using CurrencyManager, each row that
> has been navigated/selected/scrolled-through is marked with a RowState of
> 'Modified'.
>
> Of course, all of the rows are updated even though no row data has changed
> when DataAdapter.Update is invoked. This occurs regardless of field type.
>
> Other than unchanged rows being marked as Modified, the CurrencyManager
> functions as expected.
>
> Details:
>
> 1) CurrencyManager is instantiated and bound at runtime.

>
> Need a little here.....   :-P
> Thanks
>

"Digital Slug" <DigitalSlugnospamalias@newsgroups.nospam> wrote in message
news:CB7450EE-185F-43DD-9638-99D4D6A2B932@microsoft.com...
> Hello,
>
>> 1) CurrencyManager is instantiated and bound at runtime.
>> Not sure what you mean by that, you don't bind a CurrencyManager.
>
> I mispoke....
> I instantiate the CurrencyManager using the Bindingcontext.
>
> genericCurrencyManager =
> (System.Windows.Forms.CurrencyManager)this.BindingContext[this.MY_DATASET,
> MY_DATASET_TABLE_NAME];
>
> Nothing out of the ordinary...nothing more....
>
> I get the same "Modified Row" scenario regardless if I use custom controls
> or generic controls. Originally, I though this problem was caused by my
> custom controls, but this is not the case.
>
> It occurs when:
>
> Generic Controls added to a Form - (TextBox, DataTimePicker, ComboBoxes)
> -And-
> Custom Controls placed on a Form - Custom controls incorporate TextBox,
> DataTimePicker, ComboBox, etc.

>
>>  Most of the standard Control
>> properties you want to bind to have such an event.  Which Control
>> properties
>> are you binding ?
>
> As mentioned above, it happens when I bind to a simple TextBox on a form
> and
> when I bind to generic controls included in Custom (User) Controls. In
> regard
> to custom control binding, I provide properties that expose the underlying
> control.
>
> Example:
>
> public string FirstName
> {
> get{return firstName.Text;}
> set{firstName.Text = value;}
> }
>
> QUESTION 1: Do I need to expose or trigger events as well?

>
> Thank you for you help and suggestions.
>


>

"Bart Mermuys" wrote:

> Hi,
>
> "Digital Slug" <DigitalSlugnospamalias@newsgroups.nospam> wrote in message
> news:CB7450EE-185F-43DD-9638-99D4D6A2B932@microsoft.com...
> > Hello,
> >
> >> 1) CurrencyManager is instantiated and bound at runtime.
> >> Not sure what you mean by that, you don't bind a CurrencyManager.
> >
> > I mispoke....
> > I instantiate the CurrencyManager using the Bindingcontext.
> >
> > genericCurrencyManager =
> > (System.Windows.Forms.CurrencyManager)this.BindingContext[this.MY_DATASET,
> > MY_DATASET_TABLE_NAME];
> >
> > Nothing out of the ordinary...nothing more....
> >
> > I get the same "Modified Row" scenario regardless if I use custom controls
> > or generic controls. Originally, I though this problem was caused by my
> > custom controls, but this is not the case.
> >
> > It occurs when:
> >
> > Generic Controls added to a Form - (TextBox, DataTimePicker, ComboBoxes)
> > -And-
> > Custom Controls placed on a Form - Custom controls incorporate TextBox,
> > DataTimePicker, ComboBox, etc.
>
> But you don't mention what properties you are binding, assuming we are
> talking about the most used ones: TextBox.Text, DateTimePicker.Value/Text,
> ComboBox.Text/SelectedIndex/SelectedValue/SelectedItem, then your problem
> should definitely not occur.
>
> >
> >>  Most of the standard Control
> >> properties you want to bind to have such an event.  Which Control
> >> properties
> >> are you binding ?
> >
> > As mentioned above, it happens when I bind to a simple TextBox on a form
> > and
> > when I bind to generic controls included in Custom (User) Controls. In
> > regard
> > to custom control binding, I provide properties that expose the underlying
> > control.
> >
> > Example:
> >
> > public string FirstName
> > {
> > get{return firstName.Text;}
> > set{firstName.Text = value;}
> > }
> >
> > QUESTION 1: Do I need to expose or trigger events as well?
>
> Yes, you do.  Something like:
>
> public class SomeUserControl : UserControl
> {
>   // carefull not to forget the event keyword, it  won't
>   // cause any errors, but it won't work either
>   public event EventHandler FirstNameChanged;
>
>   public string FirstName
>   {
>     get { return firstName.Text; }
>     set { firstName.Text = value; }
>   }
>
>   // add eventhandler to firstName.TextChanged
>   private void firstName_TextChanged(object Sender, EventArgs e)
>   {
>     if ( FirstNameChanged != null )
>         FirstNameChanged( this, EventArgs.Empty );
>   }
>
> }
>
> > Again, I have the same problem if I drop a textbox directly onto a form
> > (bypassing the custom controls altogether).
>
> Are you really sure ... it's a bit coincidental you have been using
> UserControls.
>
> >
> > QUESTION 2: Should I expect the same of different results if I unbind all
> > controls and simply toggle through all datarows using
> > CurrencyManager.Position?
>
> If you unbind all Control properties then your problem shouldn't occur.
> There might be a chance something else is causing this (can't think of
> anything right now).  Nevertheless if the cause would be something else then
> you still need to implement the [PropName]Changed events on the UserControls
> or you will have it again.
>
> HTH,
> Greetings
>
>
>
> >
> > Thank you for you help and suggestions.
> >
>
>
> >
>
>
>