[abu7shihab]

الحمدلله توصلت للحل :
If FOODLISTDataGridView.SelectedRows.Count > 0 Then
For i As Integer = FOODLISTDataGridView.SelectedRows.Count - 1 To 0 Step -1
FOODLISTDataGridView.SelectedRows(i).Cells(4).Value = TextBox14.Text.ToString
FOODLISTDataGridView.SelectedRows(i).Cells(5).Value = DateTimePicker3.Value.ToString
FOODLISTDataGridView.SelectedRows(i).Cells(6).Value = DateTimePicker4.Value.ToString
FOODLISTDataGridView.SelectedRows(i).Cells(7).Value = DateTimePicker1.Value.ToString
FOODLISTDataGridView.SelectedRows(i).Cells(8).Value = DateTimePicker2.Value.ToString
Next