Cannot implicitly convert type 'int' to 'string'

Question

My code:

public void FillMaxBankCode()
{
    try
    {
        DataSet ds = new DataSet();
        ds = bol.SelectMaxBankCode();
        string j = ds.Tables[0].         


        

Answer 1

public void FillMaxBankCode()
        {
            try
            {
                DataSet ds = new DataSet();
                ds = bol.SelectMaxBankCode();
                string j = ds.Tables[0].Rows[0].ToString();
                txtbankid.Text = j;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }