Binded text fields don't update the database

[Ville Mattila]

Hi there,

I will post my question to this group too bacause the .data group seems
to be rather quiet.

I've been playing with VB.NET and ADO for a week now and find the
different data handling functions very easy and nice. Anyway, I'm afraid
that I haven't understood the data binding things correct.

I'm using MySQL Connector/.NET to access my database from the
application. The queries work find and I'm able to fill the dataset from
data adapter to access the data.

I've binded a few text fields to the dataset in the code (I don't want
to use the Server Explorer).
Me.txtID.DataBindings.Clear()
Me.txtID.DataBindings.Add("Text", dDataset, "table.id")

For debug purposes, I've connected also a DataGrid to the dataset:
Me.DataGrid1.DataSource = dDataset

I fetch a row from the database by SELECT * FROM table WHERE
name="Ville". No problems with getting the correct values to the
textboxes. But now I try to edit the data.

I understood that since a textbox is binded to a dataset, changes made
to the textbox content will update the dataset automatically. OK, it
seems to do that correctly. I edit a textbox, the column content changes
in a datagrid as it should. Now I try to update the database with my
changes:
dAdapter.Update(dDataset, "table")

For some reason, the changes won't reach the database at all. Anyway, no
exception is thrown either.

If I edit the same field value in a datagrid and then call the update of
the data adapter, the modified data will be updated to the databse
without any problems.

Any ideeas?

Thanks for your help!

Ville

[Cor Ligthert]

Ville,

Mostly is the answer to put before the update the sentence

BindingContext(ds.Tables(0)).EndCurrentEdit()

The data is pushed down in the datasource by a rowchange, and with that
command above is that forced.

When you are searching for a good ADONET newsgroup than it the newsgroup

microsoft.public.dotnet.framework.adonet
the one you are looking for

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I hope this helps?

Cor
"Ville Mattila" <vi***@mattila.fi>

Hi there,

I will post my question to this group too bacause the .data group seems to
be rather quiet.

I've been playing with VB.NET and ADO for a week now and find the
different data handling functions very easy and nice. Anyway, I'm afraid
that I haven't understood the data binding things correct.

I'm using MySQL Connector/.NET to access my database from the
application. The queries work find and I'm able to fill the dataset from
data adapter to access the data.

I've binded a few text fields to the dataset in the code (I don't want
to use the Server Explorer).
Me.txtID.DataBindings.Clear()
Me.txtID.DataBindings.Add("Text", dDataset, "table.id")

For debug purposes, I've connected also a DataGrid to the dataset:
Me.DataGrid1.DataSource = dDataset

I fetch a row from the database by SELECT * FROM table WHERE
name="Ville". No problems with getting the correct values to the
textboxes. But now I try to edit the data.

I understood that since a textbox is binded to a dataset, changes made
to the textbox content will update the dataset automatically. OK, it
seems to do that correctly. I edit a textbox, the column content changes
in a datagrid as it should. Now I try to update the database with my
changes:
dAdapter.Update(dDataset, "table")

For some reason, the changes won't reach the database at all. Anyway, no
exception is thrown either.

If I edit the same field value in a datagrid and then call the update of
the data adapter, the modified data will be updated to the databse
without any problems.

Any ideeas?

Thanks for your help!

Ville

[Ville Mattila]

Cor Ligthert wrote:

Mostly is the answer to put before the update the sentence

BindingContext(ds.Tables(0)).EndCurrentEdit()
Thank you Cor! I added that row to the code and the data was correctly
updated.
When you are searching for a good ADONET newsgroup than it the newsgroup

microsoft.public.dotnet.framework.adonet
the one you are looking for

Thanks for a tip too. I will subscribe there and follow the discussion
for future questions.

Best regards,
Ville