Question

I using this code for sum selected cells. Its work good but when user selecte cell where is letter is throws exceptions : ) how can i secure when in selectet cells is letters dont make sum

Answer 1

private void dataGridView1_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e) 
    { 
        String filterStatus = DataGridViewAutoFilterColumnHeaderCell.GetFilterStatus(dataGridView1); 
        if (String.IsNullOrEmpty(filterStatus)) 
        { 
            showAllLabel.Visible = false; 
            filterStatusLabel.Visible = false; 
        } 
        else 
        { 
            int result = -1;
            Int32.TryParse(filterStatus, out result);
            if (result != 0)
            {
                 // it is a number
                 showAllLabel.Visible = true; 
                 filterStatusLabel.Visible = true; 
                 filterStatusLabel.Text = filterStatus; 
            }
            else
            {
                 // it can be a number yet won't help you with adding
            }
        } 
    }