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| Title | Change the way a DataGridView control navigates when the user presses the Enter key in Visual Basic 2005 |
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| Description | This example shows how to change the way a DataGridView control navigates when the user presses the Enter key in Visual Basic 2005. |
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| Keywords | DataGridView, Enter, Return, navigate, focus, cell, row, column, Visual Basic 2005, VB 2005 |
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| Categories | Controls, VB.NET |
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When you are navigating in the control, intercept the KeyPress event. If the key is Return, select the next cell that you want and set e.Handled = True to tell the control not to process the Return key.
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' Ignore Return keys.
Private Sub DataGridView1_KeyDown(ByVal sender As Object, _
ByVal e As System.Windows.Forms.KeyEventArgs) Handles _
DataGridView1.KeyDown
If e.KeyCode = Keys.Return Then
Dim cur_cell As DataGridViewCell = _
DataGridView1.CurrentCell
Dim col As Integer = cur_cell.ColumnIndex
col = (col + 1) Mod DataGridView1.Columns.Count
cur_cell = DataGridView1.CurrentRow.Cells(col)
DataGridView1.CurrentCell = cur_cell
e.Handled = True
End If
End Sub
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Unfortunately when you are editing a value, the DataGridView control doesn't have focus, the editing control (normally a DataGridViewTextBoxEditingControl--now that's a mouthful!) does so you cannot catch the Return key as easily. When you press Return, the editing control hides and focus moves to the next cell down.
To handle this, catch the EditingControlShowing event that occurs when the editing control is displayed and save the current row number. In the SelectionChanged event handler, restore the row if we were just editing.
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' Save the current row number.
Private m_EditingRow As Integer = -1
Private Sub DataGridView1_EditingControlShowing(ByVal _
sender As Object, ByVal e As _
System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) _
Handles DataGridView1.EditingControlShowing
m_EditingRow = DataGridView1.CurrentRow.Index
End Sub
' If we just finished editing, restore the current row
' number.
Private Sub DataGridView1_SelectionChanged(ByVal sender As _
Object, ByVal e As System.EventArgs) Handles _
DataGridView1.SelectionChanged
If m_EditingRow >= 0 Then
Dim new_row As Integer = m_EditingRow
m_EditingRow = -1
DataGridView1.CurrentCell = _
DataGridView1.Rows(new_row). _
Cells(DataGridView1.CurrentCell.ColumnIndex)
End If
End Sub
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