How to find out the cell is empty in datagridview in c#.net

Question

In datagridview how to find out the cell is empty when iam leaving the cell,if it is empty i want to handle that cell,i.e ristrict the user go forward.if data fill user can go forword normally,how can acheave this task.

Answer 1

in the event of DataGridView CellValidating or RowValidating

private void dataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{
    if (dataGridView1.IsCurrentCellDirty)
        if (e.ColumnIndex == 0)
        {
            if (string.IsNullOrWhiteSpace(dataGridView1[e.ColumnIndex, e.RowIndex].EditedFormattedValue.ToString()))
            {
                e.Cancel = true;
                MessageBox.Show("Please enter some text before you leave.");
            }
            else
            {
                //Some logic here
            }
        }
}