I have been encountering a problem reported by a number of people:
Data entered in a Windows Forms datagrid is not updated in the underlying
data
until the entry focus has been updated to the next row/column.
Specifically, my UI has a  DataGrid on a tab page, and I want the data
to get updated from the grid when switching between tabs
A few observations of my own:
I) The most common suggestion to handle this issue is to call the
currencymanger EndCurrentEdit method or the DataRowView.EndEdit method.
Comment: It seems to me that this will only remove the necessity of moving
to the next *Row*
of the grid. If you do not move to the next Column, then this does not force
the update.
II) I have found a workaround to this by creating an inherited
DataGridColumnStyle,
and exposing a public method "CommitChange" which called the protected
overridden "Commit". :

   Public Sub CommitChange(ByVal oCurMgr As CurrencyManager, ByVal
intRowNumber As Integer)
       me.Commit(oCurMgr, intRowNumber)
   End Sub

Then calling from the relevant form event:

Dim cm As CurrencyManager = _
CType(dgGrid1.BindingContext(dgGrid1.DataSource, dgGrid1.DataMemer)    ,
CurrencyManager)

Dim cd As CustomGridColumnStyle = _
CType(dgGrid1.TableStyles(0).GridColumnStyles(<UpdatingClumnNUmber>),
CustomGridColumnStyle)
cd.CommitChange(cm, dgRoster.CurrentCell.RowNumber)

This appears to work, though ,
    1)It seems tToo complicated to me.
    2) *DISCLAIMER* I am new to the whole .net/databinding thing, so I don't
know what
inherent bugs are in this code.

III) What I am currently using to solve this problem is putting the code

    dgDataGrid1.Select(0)

in the event handler for dgDataGrid1.Leave.

The final comment I have is that this kind of thing is exactly why  I have
always
avoided using grids for data entry, preferring instead read-only grids with
associated
discrete data entry controls. Unfortunately, my users insist on a grid in my
current project.

Jonathan Steinberg
BRCorp
jsteinberg@NOTBrcorp.com  (Not NOT for real address)

microsoft.public.dotnet.framework.windowsforms.controls