public bool checkExistingCustomer()
{
try
{
CustomerDA cda = new CustomerDA();
DataSet ds = cda.CheckExistingCustomer();
foreach (DataTable DT in ds.Tables)
{
foreach (DataRow DR in DT.Rows)
{
if (Convert.ToBoolean(DR[1].ToString()))
return true;
}
}
}
catch (Exception ex)
{
}
return false;
}