Detect when user modifies a value in a bound textbox

Hi,
I have a form which views exactly one record from a dataset. It uses a
BindingSource and has bindings linking several textboxes to the data.

I would like to enable / disable the "Close" "OK" and "Cancel" buttons on
the form according to the row status; What is the best way to do this? I
can't find an event which fires when the user modifies a value in a bound
text box - I don't want to add a handler for every "TextChanged" event!

Thanks for any ideas,
James

Hi James,

Did you try using BindingSource.CurrentItemChanged event?

--
Miha Markic [MVP C#]
RightHand .NET consulting & development www.rthand.com
Blog: http://cs.rthand.com/blogs/blog_with_righthand/

"James Minns" <minns@DELETEME.inwind.it> wrote in message
news:ea2gQTElGHA.4508@TK2MSFTNGP05.phx.gbl...
> Hi,
> I have a form which views exactly one record from a dataset. It uses a
> BindingSource and has bindings linking several textboxes to the data.
>
> I would like to enable / disable the "Close" "OK" and "Cancel" buttons on
> the form according to the row status; What is the best way to do this? I
> can't find an event which fires when the user modifies a value in a bound
> text box - I don't want to add a handler for every "TextChanged" event!
>
> Thanks for any ideas,
> James
>

I did try that; the event fires four times during the initialization of the
form when I press the OK button, but never when a bound text box is
modified.

This works if I call it every second, but I need an event:

Dim drView As DataRowView = MyBindingSource.Current
If drView.Row.HasVersion(DataRowVersion.Proposed) Then
UserHasModifiedSomething = True
James



"Miha Markic [MVP C#]" <miha at rthand com> wrote in message
news:%23qu2xcElGHA.2304@TK2MSFTNGP02.phx.gbl...
> Hi James,
>
> Did you try using BindingSource.CurrentItemChanged event?
>
> --
> Miha Markic [MVP C#]
> RightHand .NET consulting & development www.rthand.com
> Blog: http://cs.rthand.com/blogs/blog_with_righthand/
>
> "James Minns" <minns@DELETEME.inwind.it> wrote in message
> news:ea2gQTElGHA.4508@TK2MSFTNGP05.phx.gbl...
>> Hi,
>> I have a form which views exactly one record from a dataset. It uses a
>> BindingSource and has bindings linking several textboxes to the data.
>>
>> I would like to enable / disable the "Close" "OK" and "Cancel" buttons on
>> the form according to the row status; What is the best way to do this? I
>> can't find an event which fires when the user modifies a value in a bound
>> text box - I don't want to add a handler for every "TextChanged" event!
>>
>> Thanks for any ideas,
>> James
>>
>
>

You might implement DataTable.ColumnChanged event then.

--
Miha Markic [MVP C#]
RightHand .NET consulting & development www.rthand.com
Blog: http://cs.rthand.com/blogs/blog_with_righthand/

"James Minns" <minns@DELETEME.inwind.it> wrote in message
news:eqllp4ElGHA.3816@TK2MSFTNGP02.phx.gbl...
>I did try that; the event fires four times during the initialization of the
>form when I press the OK button, but never when a bound text box is
>modified.
>
> This works if I call it every second, but I need an event:
>
> Dim drView As DataRowView = MyBindingSource.Current
> If drView.Row.HasVersion(DataRowVersion.Proposed) Then
> UserHasModifiedSomething = True
> James
>
>
>
> "Miha Markic [MVP C#]" <miha at rthand com> wrote in message
> news:%23qu2xcElGHA.2304@TK2MSFTNGP02.phx.gbl...
>> Hi James,
>>
>> Did you try using BindingSource.CurrentItemChanged event?
>>
>> --
>> Miha Markic [MVP C#]
>> RightHand .NET consulting & development www.rthand.com
>> Blog: http://cs.rthand.com/blogs/blog_with_righthand/
>>
>> "James Minns" <minns@DELETEME.inwind.it> wrote in message
>> news:ea2gQTElGHA.4508@TK2MSFTNGP05.phx.gbl...
>>> Hi,
>>> I have a form which views exactly one record from a dataset. It uses a
>>> BindingSource and has bindings linking several textboxes to the data.
>>>
>>> I would like to enable / disable the "Close" "OK" and "Cancel" buttons
>>> on the form according to the row status; What is the best way to do
>>> this? I can't find an event which fires when the user modifies a value
>>> in a bound text box - I don't want to add a handler for every
>>> "TextChanged" event!
>>>
>>> Thanks for any ideas,
>>> James
>>>
>>
>>
>
>

Perfect - problem solved!
Thank you very much.

James

"Miha Markic [MVP C#]" <miha at rthand com> wrote in message
news:eolUnJFlGHA.1264@TK2MSFTNGP05.phx.gbl...
> You might implement DataTable.ColumnChanged event then.
>
> --
> Miha Markic [MVP C#]
> RightHand .NET consulting & development www.rthand.com
> Blog: http://cs.rthand.com/blogs/blog_with_righthand/
>
> "James Minns" <minns@DELETEME.inwind.it> wrote in message
> news:eqllp4ElGHA.3816@TK2MSFTNGP02.phx.gbl...
>>I did try that; the event fires four times during the initialization of
>>the form when I press the OK button, but never when a bound text box is
>>modified.
>>
>> This works if I call it every second, but I need an event:
>>
>> Dim drView As DataRowView = MyBindingSource.Current
>> If drView.Row.HasVersion(DataRowVersion.Proposed) Then
>> UserHasModifiedSomething = True
>> James
>>
>>
>>
>> "Miha Markic [MVP C#]" <miha at rthand com> wrote in message
>> news:%23qu2xcElGHA.2304@TK2MSFTNGP02.phx.gbl...
>>> Hi James,
>>>
>>> Did you try using BindingSource.CurrentItemChanged event?
>>>
>>> --
>>> Miha Markic [MVP C#]
>>> RightHand .NET consulting & development www.rthand.com
>>> Blog: http://cs.rthand.com/blogs/blog_with_righthand/
>>>
>>> "James Minns" <minns@DELETEME.inwind.it> wrote in message
>>> news:ea2gQTElGHA.4508@TK2MSFTNGP05.phx.gbl...
>>>> Hi,
>>>> I have a form which views exactly one record from a dataset. It uses a
>>>> BindingSource and has bindings linking several textboxes to the data.
>>>>
>>>> I would like to enable / disable the "Close" "OK" and "Cancel" buttons
>>>> on the form according to the row status; What is the best way to do
>>>> this? I can't find an event which fires when the user modifies a value
>>>> in a bound text box - I don't want to add a handler for every
>>>> "TextChanged" event!
>>>>
>>>> Thanks for any ideas,
>>>> James