How to determine if a form IsDirty

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Jim Rand - 29 Jan 2007 22:12 GMT

Let's say you have a form with a bunch of text boxes bound to a binding
source. The form also has a "Save" button which you want enabled only if
the user has made changes. The Save button will call
bindingSource.EndEdit() and will then instruct the dataset to update the
database.

Other than catching the text control's EditValueChanged event, is there a
simpler way that applies to the whole form?

It would be nice if the binding source had a IsDirty property that is set to
true prior to the EndEdit().

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Bart Mermuys - 31 Jan 2007 19:20 GMT

Hi,

> Let's say you have a form with a bunch of text boxes bound to a binding
> source. The form also has a "Save" button which you want enabled only if
[quoted text clipped - 4 lines]
> Other than catching the text control's EditValueChanged event, is there a
> simpler way that applies to the whole form?

No ,don't think so, it seems to be a missing feature.

If you are binding to ADO.NET, you could use:
((DataRowView)BindingSource.Current).Row.HasVersion(DataRowVersion.Proposed)
to check for changes, but as someone previously pointed out, there isn't an
event you can handle for this.

HTH,
Greetings

> It would be nice if the binding source had a IsDirty property that is set
> to true prior to the EndEdit().

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Jim Rand - 31 Jan 2007 20:49 GMT

Bart,

You have solved the problem no one else has! Great idea!

Here is how I implemented it.

private void dataNavigator_PositionChanged(...)
{
btnSave.Enabled = false;
if ( _RWAccess ) { timer.Enabled = true; }
}

private void timer_Tick(...)
{
if
(((DataRowView)bs1Office.Current).Row.HasVersion(DataRowVersion.Proposed))
{
timer.Enabled = false;
btnSave.Enabled = true;
}
}

You have saved me an incredible amount of work!

Thanks
Jim

> Hi,
>
[quoted text clipped - 19 lines]
>> It would be nice if the binding source had a IsDirty property that is set
>> to true prior to the EndEdit().

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How to determine if a form IsDirty

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