参数化Insert

public void Insert(Customer item) {
            string sql = @"
USE [WXCustomerCard]
GO

INSERT INTO [dbo].[customer_info]
           ([customer_id]
           ,[member_id]
           ,[grade_id]
           ,[nick_name]
           ,[name]
           ,[tel]
           ,[country]
           ,[province]
           ,[city]
           ,[town]
           ,[address]
           ,[postcode]
           ,[shop_name]
           ,[modify_date]
           ,[score]
           ,[goods_total]
           ,[trade_count]
           ,[trade_total]
           ,[back_count]
           ,[balance]
           ,[usedscore]
           ,[allowusescore]
           ,[arrearagevalue]
           ,[email]
           ,[birthday])
     VALUES
           (@Customer_id   
           ,@Member_id     
           ,@Grade_id      
           ,@Nick_name     
           ,@Name          
           ,@Tel           
           ,@Country       
           ,@Province      
           ,@City          
           ,@Town          
           ,@Address       
           ,@Postcode      
           ,@Shop_name     
           ,@Modify_date   
           ,@Score         
           ,@Goods_total   
           ,@Trade_count   
           ,@Trade_total   
           ,@Back_count    
           ,@Balance       
           ,@Usedscore     
           ,@Allowusescore
           ,@Arrearagevalue
           ,@Email         
           ,@Birthday)       

";
            List<DbParameter> ps = new List<DbParameter>(){
                    new SqlParameter("@Customer_id",item.Customer_id),
                    new SqlParameter("@Member_id",item.Member_id),
                    new SqlParameter("@Grade_id",item.Grade_id),
                    new SqlParameter("@Nick_name",item.Nick_name),
                    new SqlParameter("@Name",item.Name),
                    new SqlParameter("@Tel",item.Tel),
                    new SqlParameter("@Country",item.Country),
                    new SqlParameter("@Province",item.Province),
                    new SqlParameter("@City",item.City),
                    new SqlParameter("@Town",item.Town),
                    new SqlParameter("@Address",item.Address),
                    new SqlParameter("@Postcode",item.Postcode),
                    new SqlParameter("@Shop_name",item.Shop_name),
                    new SqlParameter("@Modify_date",item.Modify_date),
                    new SqlParameter("@Score",item.Score),
                    new SqlParameter("@Goods_total",item.Goods_total),
                    new SqlParameter("@Trade_count",item.Trade_count),
                    new SqlParameter("@Trade_total",item.Trade_total),
                    new SqlParameter("@Back_count",item.Back_count),
                    new SqlParameter("@Balance",item.Balance),
                    new SqlParameter("@Usedscore",item.Usedscore),
                    new SqlParameter("@Allowusescore",item.Allowusescore),
                    new SqlParameter("@Arrearagevalue",item.Arrearagevalue),
                    new SqlParameter("@Email",item.Email),
                    new SqlParameter("@Birthday",item.Birthday),
                    new SqlParameter("@OpenId",item.OpenId)
                };
            db.ExecuteNonQuery(sql, ps);

        }