public static DataTable SQL1(string SerialNumber, string type)
        {
            DataTable DT = new DataTable();
            string conString = "Data Source=; Initial Catalog=;User ID=;Password=";//连接数据库的字符
            string sql = "Data";//要调用的存储过程名  
            try
            {
                SqlConnection conStr = new SqlConnection(conString);//SQL数据库连接对象，以数据库链接字符串为参数  
                SqlCommand comStr = new SqlCommand(sql, conStr);//SQL语句执行对象，第一个参数是要执行的语句，第二个是数据库连接对象  
                comStr.CommandType = CommandType.StoredProcedure;//设置执行类型为存储过程  
                                                                 //依次设定存储过程的参数  
                comStr.Parameters.Add("@SerialNumber", SqlDbType.Text).Value = SerialNumber;
                comStr.Parameters.Add("@type", SqlDbType.Text).Value = type;

                conStr.Open();//打开数据库连接  
                SqlDataAdapter SqlDataAdapter1 = new SqlDataAdapter(comStr);
                SqlDataAdapter1.Fill(DT);
                conStr.Close();//关闭连接 
            }

            catch (Exception ex)
            {
                MessageBox.Show("操作不成功");
            }

            return DT;
        }

ALTER procedure Data 
@SerialNumber VarChar (50),
@type VarChar (10)

as 
BEGIN
SELECT b1.LotNumber FROM m_HL100GEEPROM_T b1 WHERE SerialNumber=@SerialNumber 
NED
GO