Performing operations on out of focus windows forms VB 2005

One way would be to make a public sub on the form with the datagridview to move the highlight and call this sub from the buttons on your other form.

The sub could look like:

Public Sub ChangeRow(ByVal UpDown As Boolean)
' UpDown True moves Up
' UpDown False moves Down
Dim Row As Integer = DGV1.CurrentRow.Index
Dim Column As Integer = DGV1.CurrentCell.ColumnIndex
If Row = 0 And UpDown Then Exit Sub
If Row = DGV1.RowCount - 1 And Not UpDown Then Exit Sub
If UpDown Then
DGV1.CurrentCell = DGV1(Column, Row - 1)
Else
DGV1.CurrentCell = DGV1(Column, Row + 1)
End If
End Sub

Dave299 at 2007-9-4 >

So I have been giving it a try but it seems when I try to get back to the datagrid screen from the details screen the col and row properties are set back to 0 for the gridview object.

Actually they go to 0 when the grid is out of focus.

CoderD at 2007-9-4 >

Datagrid form:

Private Sub dgvDatagrid_CellDoubleClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgvDatagrid.CellDoubleClick

Dim strSubID As String = dgvViewSubscriber.SelectedCells.Item(1).Value.ToString
m_intGridRow = dgvViewSubscriber.CurrentCell.RowIndex
m_intGridCol = dgvViewSubscriber.CurrentCell.ColumnIndex
...
...
...
Dim detailsForm As new DetailsForm
detailsForm.show()
....
...

End Sub

Here is the function as per your suggestion.

Public Sub ChangeCursor(ByVal boolUp As Boolean)

If m_intGridRow = 0 And boolUp Then Exit Sub
If m_intGridRow = dgvDatagrid.RowCount - 1 And Not boolUp Then Exit Sub

If boolUp Then
dgvDatagrid.CurrentCell = dgvDatagrid(m_intGridCol, m_intGridRow - 1)
Else
dgvDatagrid.CurrentCell = dgvDatagrid(m_intGridCol, m_intGridRow + 1)
End If

End Sub

Details Form:

frmGrid.ChangeCursor(false)
....
End Sub

So this throws a ArgumentOutOfRange Exception. While debugging the properties for the datagrid are 0. However when the grid form is in focus the properties such as rowcount are back to 100 which they should be. I hope this gives some sort of idea of what I am trying to do.

CoderD at 2007-9-4 >

The currentcellchanged event is only raised when the current cell is changed. Setting the m_intGridRow and m_intgridCol values in the currentcellchanged event cannot produce the exception you are experiencing.

Are you trying to set these values somewhere else, such as the Form load event - that will produce the exception your are seeing. I cannot think of any reason why you would need to set these values other than in the cellchanged event so try removing the code that is setting them elsewhere and see if that solves the problem. If not then please post all the code where these values are being set.

Dave299 at 2007-9-4 >