Hi,

How can I see if the Data is changed by the user in my DataGrid so I can ask
him to save the changes or not?

Thanks,

Pieter

Pieter,

You can check if the underlaying datatable has changes.

Unluckely there is no method datatable.haschanges.

So you should use a workaround something as pseudo

myNewTable as new datatable = datasource.table.getchanges
And than test if that is filled with rows.

I hope that this gives an idea?

Cor

Hm thanks, that seems to work.
But what if I have 2 bound DataTables in my DataGrid, and I wan't only do
the check on the records that are currently in the DataView?

Pieter

"Cor Ligthert" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Pieter,
>
> You can check if the underlaying datatable has changes.
>
> Unluckely there is no method datatable.haschanges.
>
> So you should use a workaround something as pseudo
>
> myNewTable as new datatable = datasource.table.getchanges
> And than test if that is filled with rows.
>
> I hope that this gives an idea?
>
> Cor
>
>

Pieter,

The dataview has as well a table property which tells which table it
references

Cor

> Hm thanks, that seems to work.
> But what if I have 2 bound DataTables in my DataGrid, and I wan't only do
> the check on the records that are currently in the DataView?
>

You could also make a loop foreach through all rows and check their RowState
property - it should be even faster than calling GetChanges.

--
Miha Markic [MVP C#] - RightHand .NET consulting & development
miha at rthand com
www.rthand.com

"DraguVaso" <(E-Mail Removed)> wrote in message
news:%23$(E-Mail Removed)...
> Hi,
>
> How can I see if the Data is changed by the user in my DataGrid so I can
> ask
> him to save the changes or not?
>
> Thanks,
>
> Pieter
>
>

Miha,

I like to have the datatable.haschanges

And in a chat was told that they where thinking about it. I think it is
easier than making for every table an own dataset what is as well an
alternative.

Do you understand now?

However I do not think that looping or getchanges would make difference.

:-)

Cor

Thanks,

I gave it a try and it looked at least as fast as the solution of Cor. Maybe
I'm gonna see a difference when I work with bigger DataSets.

Thanks a lot!

Pieter


"Miha Markic [MVP C#]" <miha at rthand com> wrote in message
news:ea4A%(E-Mail Removed)...
> You could also make a loop foreach through all rows and check their
RowState
> property - it should be even faster than calling GetChanges.
>
> --
> Miha Markic [MVP C#] - RightHand .NET consulting & development
> miha at rthand com
> www.rthand.com
>
> "DraguVaso" <(E-Mail Removed)> wrote in message
> news:%23$(E-Mail Removed)...
> > Hi,
> >
> > How can I see if the Data is changed by the user in my DataGrid so I can
> > ask
> > him to save the changes or not?
> >
> > Thanks,
> >
> > Pieter
> >
> >
>
>

Hi Cor,

"Cor Ligthert" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Miha,
>
> I like to have the datatable.haschanges

Yes, me too :-)

>
> And in a chat was told that they where thinking about it. I think it is
> easier than making for every table an own dataset what is as well an
> alternative.
>
> Do you understand now?

Yes, I did understand before, too :-)
>
> However I do not think that looping or getchanges would make difference.

Oh, it does make a difference.
Imagine a table with 10000 rows and all of them are changed.
If you invoke GetChanges you'll get back a nice copy of entire table while
using a loop, there is no overhead of data returned and you can stop at the
first changed row: :-)

--
Miha Markic [MVP C#] - RightHand .NET consulting & development
miha at rthand com
www.rthand.com

Miha,

> Oh, it does make a difference.
> Imagine a table with 10000 rows and all of them are changed.
> If you invoke GetChanges you'll get back a nice copy of entire table while
> using a loop, there is no overhead of data returned and you can stop at
the
> first changed row: :-)

You win this time, I did not think on that, good one.

:-)

Cor

> You win this time, I did not think on that, good one.
>
> :-)
>

That makes Slovenia: Netherland 1:0 :-)
Hey Cor, many people, many solutions. Sometimes you win sometimes you don't.
However, it is not about wining, I really like to see many different
solutions - so I can learn.

--
Miha Markic [MVP C#] - RightHand .NET consulting & development
miha at rthand com
www.rthand.com