CloudComputingFinalProject/App.code/DAL/databackup.cs

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

namespace Basic.DAL
{
    /// <summary>
    /// ���ݷ��ʲ�databackup
    /// </summary>
    public partial class databackup
    {
        /// <summary>
        /// ����һ������
        /// </summary>
        public int Add(Basic.Model.databackup model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("insert into tb_databackup(");
            strSql.Append("title,paixu,storage,user_name,add_time)");
            strSql.Append(" values (");
            strSql.Append("@title,@paixu,@storage,@user_name,@add_time)");
            strSql.Append(";select @@IDENTITY");

            SqlParameter[] parameters = { 
                new SqlParameter("@title", SqlDbType.NVarChar,100),
                new SqlParameter("@paixu", SqlDbType.Int,10),
                new SqlParameter("@storage", SqlDbType.NVarChar,100),
                new SqlParameter("@user_name", SqlDbType.NVarChar,100),
                new SqlParameter("@add_time", SqlDbType.DateTime,23)};
            parameters[0].Value = model.title;
            parameters[1].Value = model.paixu;
            parameters[2].Value = model.storage;
            parameters[3].Value = model.user_name;
            parameters[4].Value = model.add_time;

            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.databackup model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("update tb_databackup set ");
            strSql.Append("title=@title,");
            strSql.Append("paixu=@paixu,");
            strSql.Append("storage=@storage,");
            strSql.Append("user_name=@user_name,");
            strSql.Append("add_time=@add_time");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = { 
                new SqlParameter("@title", SqlDbType.NVarChar,100),
                new SqlParameter("@paixu", SqlDbType.Int,10),
                new SqlParameter("@storage", SqlDbType.NVarChar,100),
                new SqlParameter("@user_name", SqlDbType.NVarChar,100),
                new SqlParameter("@add_time", SqlDbType.DateTime,23),
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = model.title;
            parameters[1].Value = model.paixu;
            parameters[2].Value = model.storage;
            parameters[3].Value = model.user_name;
            parameters[4].Value = model.add_time;
            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_databackup");
            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.databackup GetModel(int id)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("select top 1 id,title,paixu,storage,user_name,add_time from tb_databackup");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = { 
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;
            Basic.Model.databackup model = new Basic.Model.databackup();
            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]["title"].ToString()))
                {
                    model.title = ds.Tables[0].Rows[0]["title"].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]["storage"].ToString()))
                {
                    model.storage = ds.Tables[0].Rows[0]["storage"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["user_name"].ToString()))
                {
                    model.user_name = ds.Tables[0].Rows[0]["user_name"].ToString();
                }
                if (!string.IsNullOrEmpty(ds.Tables[0].Rows[0]["add_time"].ToString()))
                {
                    model.add_time = DateTime.Parse(ds.Tables[0].Rows[0]["add_time"].ToString());
                }
                return model;
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// ����ǰ��������
        /// </summary>
        public DataSet GetList(int Top, string strWhere, string filedOrder)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("select ");
            if (Top > 0)
            {
                strSql.Append(" top " + Top.ToString());
            }
            strSql.Append("id,title,paixu,storage,user_name,add_time");
            strSql.Append(" from tb_databackup");
            if (strWhere.Trim() != "")
            {
                strSql.Append(" where " + strWhere);
            }
            strSql.Append(" order by " + filedOrder);
            return DbHelperSQL.Query(strSql.ToString());
        }

        /// <summary>
        /// �Ƿ����ڸü�¼
        /// </summary>
        public bool Exists(int id)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("select count(1) from tb_databackup");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = {
                new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;

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

        //���ӵ�============================================================================================================
        /// <summary>
        /// ���ò�ѯ��ҳ����
        /// </summary>
        public DataSet GetList(string _strWhere, string _orderby, int _pageSize, int _page, out int recordCount)
        {
            BasicPage bp = new BasicPage();
            StringBuilder str_Sql = new StringBuilder();
            str_Sql.Append("select top " + _pageSize + " * from tb_databackup");
            str_Sql.Append(" where ");
            str_Sql.Append(_strWhere);
            str_Sql.Append(" and id not in ");
            str_Sql.Append(" ( ");
            str_Sql.Append(" select top " + (_page - 1) * _pageSize + " id from tb_databackup ");
            str_Sql.Append(" where ");
            str_Sql.Append(_strWhere);
            str_Sql.Append(" order by ");
            str_Sql.Append(_orderby);
            str_Sql.Append(" ) ");
            str_Sql.Append(" order by ");
            str_Sql.Append(_orderby);
            DataSet dst = bp.SelectDataBase("tb_databackup", str_Sql.ToString());
            //
            recordCount = totlePage(showTotal(_strWhere), _pageSize);
            return dst;
        }

        //��ҳ��
        public int totlePage(int Total, int PageSize)
        {
            if (Total % PageSize == 0)
            {
                return Total / PageSize;
            }
            else
            {
                return Total / PageSize + 1;
            }
        }

        //������
        protected int showTotal(string strSql)
        {
            BasicPage bp = new BasicPage();
            int intTotal = 0;
            SqlDataReader myread = bp.getRead("select count(id) as CountId from tb_databackup where " + strSql);
            if (myread.Read())
            {
                intTotal = Convert.ToInt32(myread["CountId"].ToString());
            }
            myread.Close();
            return intTotal;
        }

        /// <summary>
        /// �޸�һ������
        /// </summary>
        public void UpdateField(int id, string strValue)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("update tb_databackup set " + strValue);
            strSql.Append(" where id=" + id);
            DbHelperSQL.ExecuteSql(strSql.ToString());
        }
    }
}