CloudComputingFinalProject/App.code/DAL/albums.cs

using System;
using System.Data;
using System.Text;
using System.Data.SqlClient;
using System.Collections.Generic;

namespace Basic.DAL
{
    /// <summary>
    /// ����
    /// </summary>
    public partial class albums
    {

        /// <summary>
        /// ����һ������
        /// </summary>
        public int Add(Basic.Model.albums model)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("insert into tb_albums(");
            strSql.Append("paixu,guid,big_img,small_img,remark)");
            strSql.Append(" values (");
            strSql.Append("@paixu,@guid,@big_img,@small_img,@remark)");
            strSql.Append(";select @@IDENTITY");

            SqlParameter[] parameters = { 
                new SqlParameter("@paixu", SqlDbType.Int,10),
                new SqlParameter("@guid", SqlDbType.NVarChar,50),
                new SqlParameter("@big_img", SqlDbType.NVarChar,255),
                new SqlParameter("@small_img", SqlDbType.NVarChar,255),
                new SqlParameter("@remark", SqlDbType.NVarChar,500)};
            parameters[0].Value = model.paixu;
            parameters[1].Value = model.guid;
            parameters[2].Value = model.big_img;
            parameters[3].Value = model.small_img;
            parameters[4].Value = model.remark;

            object obj = DbHelperSQL.GetSingle(strSql.ToString(), parameters);
            if (obj == null)
            {
                return 0;
            }
            else
            {
                return Convert.ToInt32(obj);
            }
        }

        /// <summary>
        /// ����һ������
        /// </summary>
        public bool Update(Basic.Model.albums model)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("update tb_albums set ");
            strSql.Append("paixu=@paixu,");
            strSql.Append("guid=@guid,");
            strSql.Append("big_img=@big_img,");
            strSql.Append("small_img=@small_img,");
            strSql.Append("remark=@remark");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = { 
                new SqlParameter("@paixu", SqlDbType.Int,10),
                new SqlParameter("@guid", SqlDbType.NVarChar,50),
                new SqlParameter("@big_img", SqlDbType.NVarChar,255),
                new SqlParameter("@small_img", SqlDbType.NVarChar,255),
                new SqlParameter("@remark", SqlDbType.NVarChar,500),
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = model.paixu;
            parameters[1].Value = model.guid;
            parameters[2].Value = model.big_img;
            parameters[3].Value = model.small_img;
            parameters[4].Value = model.remark;
            parameters[5].Value = model.id;
            int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// ɾ��һ������
        /// </summary>
        public bool Delete(int id)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("delete from  tb_albums");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = { 
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;
            int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// �õ�һ������ʵ��
        /// </summary>
        public Basic.Model.albums GetModel(int id)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select top 1 id,paixu,guid,big_img,small_img,remark from tb_albums");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = { 
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;
            Basic.Model.albums model = new Basic.Model.albums();
            DataSet ds = DbHelperSQL.Query(strSql.ToString(), parameters);
            if (ds.Tables[0].Rows.Count > 0)
            {
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["id"].ToString()))
                {
                    model.id = int.Parse(ds.Tables[0].Rows[0]["id"].ToString());
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["paixu"].ToString()))
                {
                    model.paixu = int.Parse(ds.Tables[0].Rows[0]["paixu"].ToString());
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["guid"].ToString()))
                {
                    model.guid = ds.Tables[0].Rows[0]["guid"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["big_img"].ToString()))
                {
                    model.big_img = ds.Tables[0].Rows[0]["big_img"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["small_img"].ToString()))
                {
                    model.small_img = ds.Tables[0].Rows[0]["small_img"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["remark"].ToString()))
                {
                    model.remark = ds.Tables[0].Rows[0]["remark"].ToString();
                }
                return model;
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// ���������б�
        /// </summary>
        public List<Basic.Model.albums> GetList(string _guid)
        {
            List<Basic.Model.albums> modelList = new List<Basic.Model.albums>();

            StringBuilder strSql = new StringBuilder();
            strSql.Append("select * ");
            strSql.Append(" from tb_albums ");
            strSql.Append(" where guid='" + _guid + "'");
            DataTable dt = DbHelperSQL.Query(strSql.ToString()).Tables[0];

            int rowsCount = dt.Rows.Count;
            if (rowsCount > 0)
            {
                Basic.Model.albums model;
                for (int n = 0; n < rowsCount; n++)
                {
                    model = new Basic.Model.albums();
                    if (dt.Rows[n]["id"] != null && dt.Rows[n]["id"].ToString() != "")
                    {
                        model.id = int.Parse(dt.Rows[n]["id"].ToString());
                    }
                    if (dt.Rows[n]["paixu"] != null && dt.Rows[n]["paixu"].ToString() != "")
                    {
                        model.paixu = int.Parse(dt.Rows[n]["paixu"].ToString());
                    }
                    if (dt.Rows[n]["guid"] != null && dt.Rows[n]["guid"].ToString() != "")
                    {
                        model.guid = dt.Rows[n]["guid"].ToString();
                    }
                    if (dt.Rows[n]["big_img"] != null && dt.Rows[n]["big_img"].ToString() != "")
                    {
                        model.big_img = dt.Rows[n]["big_img"].ToString();
                    }
                    if (dt.Rows[n]["small_img"] != null && dt.Rows[n]["small_img"].ToString() != "")
                    {
                        model.small_img = dt.Rows[n]["small_img"].ToString();
                    }
                    if (dt.Rows[n]["remark"] != null && dt.Rows[n]["remark"].ToString() != "")
                    {
                        model.remark = dt.Rows[n]["remark"].ToString();
                    }
                    modelList.Add(model);
                }
            }
            return modelList;
        }

        /// <summary>
        /// ���Ҳ����ڵ�ͼƬ��ɾ����ɾ����ͼƬ������
        /// </summary>
        public void DeleteList(List<Basic.Model.albums> models, string _guid)
        {
            StringBuilder idList = new StringBuilder();
            if (models != null)
            {
                foreach (Basic.Model.albums modelt in models)
                {
                    if (modelt.id > 0)
                    {
                        idList.Append(modelt.id + ",");
                    }
                }
            }
            string id_list = Basic.Tools.Utils.DelLastChar(idList.ToString(), ",");
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select id,big_img,small_img from tb_albums where guid='" + _guid + "'");
            if (!string.IsNullOrEmpty(id_list))
            {
                strSql.Append(" and id not in(" + id_list + ")");
            }
            Basic.BasicPage bp = new BasicPage();
            DataSet ds = bp.SelectDataBase("tb_albums", strSql.ToString());
            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                bool result = Delete(int.Parse(dr["id"].ToString()));//ɾ������
                if (result)
                {
                    Basic.Tools.Utils.DeleteFile("../.." + dr["big_img"].ToString()); //ɾ��ԭͼ
                    Basic.Tools.Utils.DeleteFile("../.." + dr["small_img"].ToString()); //ɾ������ͼ
                }
            }
        }
        /// <summary>
        /// ɾ�����ݺ�ͼƬ
        /// </summary>
        public void Delete(string _guid)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select id,big_img,small_img from tb_albums where guid='" + _guid + "'");

            Basic.BasicPage bp = new BasicPage();
            DataSet ds = bp.SelectDataBase("tb_albums", strSql.ToString());
            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                bool result = Delete(int.Parse(dr["id"].ToString()));//ɾ������
                if (result)
                {
                    Basic.Tools.Utils.DeleteFile("../../" + dr["big_img"].ToString()); //ɾ��ԭͼ
                    Basic.Tools.Utils.DeleteFile("../../" + dr["small_img"].ToString()); //ɾ������ͼ
                }
            }
        }
    }
}