DAL/ProductImgService.cs

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using System;
using System.Data;
using System.Text;
using System.Data.SqlClient;

namespace DAL
{
	/// <summary>
	/// 数据访问类:ProductImgService
	/// </summary>
	public partial class ProductImgService
	{
		public ProductImgService()
		{}
		#region  BasicMethod
        /// <summary>
        /// 新生成的资讯ID更新上传的图片信息中的产品ID
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public static int UpdateProductId(string ids,int maxId)
        {
            string sql = "update ProductImg set productId = " + maxId + " where id in (" + ids + ")";
            return DBHelperSQL.ExecuteSql(sql);
        }
		/// <summary>
		/// 是否存在该记录
		/// </summary>
		public bool Exists(int id)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("select count(1) from ProductImg");
			strSql.Append(" where id=@id");
			SqlParameter[] parameters = {
					new SqlParameter("@id", SqlDbType.Int,4)
			};
			parameters[0].Value = id;

			return DBHelperSQL.Exists(strSql.ToString(),parameters);
		}


		/// <summary>
		/// 增加一条数据
		/// </summary>
		public static int Add(Model.ProductImg model)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("insert into ProductImg(");
			strSql.Append("productId,imgURL,title,alt,linkurl,status,remark)");
			strSql.Append(" values (");
			strSql.Append("@productId,@imgURL,@title,@alt,@linkurl,@status,@remark)");
			strSql.Append(";select @@IDENTITY");
			SqlParameter[] parameters = {
					new SqlParameter("@productId", SqlDbType.Int,4),
					new SqlParameter("@imgURL", SqlDbType.VarChar,50),
					new SqlParameter("@title", SqlDbType.VarChar,150),
					new SqlParameter("@alt", SqlDbType.VarChar,150),
					new SqlParameter("@linkurl", SqlDbType.VarChar,150),
					new SqlParameter("@status", SqlDbType.Int,4),