ADO.NET数据访问模板整理

     /// <summary>
     /// 数据访问类:hi_test
     /// </summary>
     public partial class TestDA
     {
         public TestDA()
         {}
         #region  Method

         /// <summary>
         /// 增加一条数据
         /// </summary>
         public bool Add(TestEN model)
         {
             StringBuilder strSql=new StringBuilder();
             strSql.Append("insert into hi_test(");
             strSql.Append("name,showpage,status,create_time)");
             strSql.Append(" values (");
             strSql.Append("?name,?showpage,?status,?create_time)");
             MySqlParameter[] parameters = {
                     new MySqlParameter("?name", model.Name),
                     new MySqlParameter("?showpage", model.ShowPage),
                     new MySqlParameter("?status", model.Status),
                     new MySqlParameter("?create_time", model.CreateTime)};

             int rows = MySqlHelper.ExecuteNonQuery(ConnStrs.AndroidConnStrForWrite, strSql.ToString(), parameters);
             if (rows > )
             {
                 return true;
             }
             else
             {
                 return false;
             }
         }
         /// <summary>
         /// 更新一条数据
         /// </summary>
         public bool Update(TestEN model)
         {
             StringBuilder strSql=new StringBuilder();
             strSql.Append("update hi_test set ");
             strSql.Append("name=?name,");
             strSql.Append("showpage=?showpage,");
             strSql.Append("status=?status");
             strSql.Append("create_time=?create_time");
             strSql.Append(" where id=?id");
             MySqlParameter[] parameters = {
                     new MySqlParameter("?name", model.Name),
                     new MySqlParameter("?showpage",model.ShowPage),
                     new MySqlParameter("?status", model.Status),
                     new MySqlParameter("?create_time",model.CreateTime),
                     new MySqlParameter("?id",model.Id)};

             int rows = MySqlHelper.ExecuteNonQuery(ConnStrs.AndroidConnStrForWrite, strSql.ToString(), parameters);
             if (rows > )
             {
                 return true;
             }
             else
             {
                 return false;
             }
         }

         /// <summary>
         /// 删除一条数据
         /// </summary>
         public bool Delete(int Id)
         {

             StringBuilder strSql=new StringBuilder();
             strSql.Append("delete from hi_test ");
             strSql.Append(" where id=?id");
             MySqlParameter[] parameters = {
                     new MySqlParameter("?id",Id)
             };

             int rows = MySqlHelper.ExecuteNonQuery(ConnStrs.AndroidConnStrForWrite, strSql.ToString(), parameters);
             if (rows > )
             {
                 return true;
             }
             else
             {
                 return false;
             }
         }

         public IList<TestEN> Find(int pageIndex, int pageSize, TestEN condition, ref int totalCount)
         {
             string dataTableKey = "hi_test";
             string dataCodeKey = "id";
             string selectColumn = " id,name,showpage,status,create_time ";

             string sortString = " create_time desc ";

             string searchCondition = " 1=1 ";
             if (condition != null)
             {
                  searchCondition += !string.IsNullOrEmpty(condition.Name) ? string.Format(" AND name like ?name escape '^' ") : string.Empty;//模糊匹配
                  //searchCondition += !string.IsNullOrEmpty(condition.Name) ? string.Format(" AND name=?name ") : string.Empty;//精确匹配
                  searchCondition += condition.ShowPage != - ? string.Format(" AND showpage={0} ", condition.ShowPage) : string.Empty;
                  searchCondition += condition.Status != - ? string.Format(" AND status={0} ", condition.Status) : string.Empty;
               //   searchCondition += condition.CreateTime != -1 ? string.Format(" AND create_time={0} ", condition.CreateTime) : string.Empty;
             }
             try
             {
                 List<MySqlParameter> parameters = new List<MySqlParameter>();
                 parameters.Add(new MySqlParameter("name", string.IsNullOrEmpty(condition.Name) ? string.Empty : "%" + condition.Name.Replace("%", "^%").Replace("_", "^_") + "%"));
                 //parameters.Add(new MySqlParameter("name", string.IsNullOrEmpty(condition.Name) ? string.Empty : condition.Name));
                 parameters.Add(new MySqlParameter("showpage", condition.ShowPage != - ? condition.ShowPage.ToString() : string.Empty));
                 parameters.Add(new MySqlParameter("status", condition.Status != - ? condition.Status.ToString() : string.Empty));
               //  parameters.Add(new MySqlParameter("create_time", condition.CreateTime != -1 ? condition.ShowPage.ToString() : string.Empty));
                 totalCount = PageAccess.GetItemCount(ConnStrs.AndroidConnStrForWrite, dataTableKey, searchCondition, parameters.ToArray());
                 if (totalCount > )
                 {
                     DataTable dt = PageAccess.GetDataSetByPage(ConnStrs.AndroidConnStrForWrite, pageIndex, pageSize, dataTableKey, selectColumn, dataCodeKey, searchCondition, sortString, parameters.ToArray()).Tables[];
                     return DataTableToList(dt);
                 }
             }
             catch (Exception e)
             {
                 throw e;
             }
             return null;
         }
         /// <summary>
         /// 获得数据列表
         /// </summary>
         public List<TestEN> DataTableToList(DataTable dt)
         {
             List<TestEN> modelList = new List<TestEN>();
             int rowsCount = dt.Rows.Count;
             if (rowsCount > )
             {
                 TestEN model;
                 for (int n = ; n < rowsCount; n++)
                 {
                     model = BuildEntity(dt.Rows[n]);
                     modelList.Add(model);
                 }
             }
             return modelList;
         }
         public TestEN BuildEntity(DataRow dr)
         {
             TestEN model = new TestEN();
             if (dr["id"] != null && dr["id"].ToString() != "")
             {
                 model.Id = int.Parse(dr["id"].ToString());
             }
             if (dr["name"] != null && dr["name"].ToString() != "")
             {
                 model.Name = dr["name"].ToString();
             }
             if (dr["showpage"] != null && dr["showpage"].ToString() != "")
             {
                 model.ShowPage = int.Parse(dr["showpage"].ToString());
             }
             if (dr["status"] != null && dr["status"].ToString() != "")
             {
                 model.Status = int.Parse(dr["status"].ToString());
             }
             if (dr["create_time"] != null && dr["create_time"].ToString() != "")
             {
                 model.CreateTime = int.Parse(dr["create_time"].ToString());
             }
             return model;
         }
         /// <summary>
         /// 得到一个对象实体
         /// </summary>
         public TestEN GetModel(int Id)
         {

             StringBuilder strSql=new StringBuilder();
             strSql.Append("select id,name,showpage,status,create_time from hi_test ");
             strSql.Append(" where id=?id");
             MySqlParameter[] parameters = {
                     new MySqlParameter("?id", Id)
             };

             TestEN model = new TestEN();
             DataSet ds = MySqlHelper.ExecuteDataSet(ConnStrs.AndroidConnStrForWrite, strSql.ToString(), parameters);
             if(ds.Tables[].Rows.Count>)
             {
                 model = BuildEntity(ds.Tables[].Rows[]);
                 return model;
             }
             else
             {
                 return null;
             }
         }
         #endregion  Method
     }