I had the following code :

Dim row As Integer = 0
For row = 0 To pdgvDataGridView.RowCount - 1
pdgvDataGridView.Rows(row).Cells(0).Value = row + 1
Next

it's to add auto number into first column of each row. The codes running well, but after the codes completed, the first column of each row remain empty. Is there any settings or codes I miss out?