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1 ///2 /// 分页嵌套查询 3 /// 4 /// 查询SQL语句 5 /// 降序字段eg:order by id/order by id desc 6 /// 开始 7 /// 一页多少条 8 /// 总条数 9 ///返回DataTable 10 public static DataTable QueryDT(string strSql,string orderBy,int start,int limit,ref int total)11 {12 using (IDbConnection conn = defaultPro.GetConnection())13 {14 if (conn.State != ConnectionState.Open)15 {16 conn.Open();17 }18 try19 {20 string query_sql = string.Format(@"SELECT CSON4.* FROM ( SELECT CSON3.* FROM (21 Select CSON2.*, ROW_NUMBER() OVER({1}) as rownum from (22 Select Count(*) over() total_count,CSON.* From ({0}) CSON23 ) CSON2 24 ) CSON3 where CSON3.rownum<{3}) CSON4 WHERE CSON4.rownum>{2}", strSql, orderBy, (start - 1) * limit, start * limit + 1);25 PrintErrorStrSql(strSql);26 IDbDataAdapter adap = defaultPro.GetDataAdapter(strSql, conn);27 DataTable dt = new DataTable();28 DataSet ds = new DataSet();29 adap.Fill(ds);30 dt = ds.Tables[0];31 if (dt.Rows.Count>0)32 {33 total =Convert.ToInt32(dt.Rows[0]["total_count"]);34 } 35 return dt;36 }37 catch (DbException ex)38 {39 throw new Exception(ex.Message);40 }41 finally42 {43 conn.Close();44 }45 }46 }
1 SELECT TOP (30) TMP.* FROM (SELECT *,ROW_NUMBER() OVER(ORDER BY ID) rn FROM UserInfo) TMP WHERE rn>30 ORDER BY ID DESC2 3 4 SELECT TOP (前多少行) TMP.* FROM (SELECT *,ROW_NUMBER() OVER(ORDER BY 排序字段) rn FROM 表名) TMP WHERE rn>越过多少行 ORDER BY 排序字段 DESC
1 SELECT TOP(5)* FROM Main WHERE id not in2 (3 SELECT TOP(5*2) id FROM Main ORDER BY id4 )5 ORDER BY ID
1 ///2 /// 分页 3 /// 4 /// 一页多少条 5 /// 当前页的索引 6 /// 总条数 7 ///8 public static string ShowPageNavigate(int pageSize,int currentPageIndex,int totalCount) 9 {10 pageSize = pageSize == 0 ? 3 : pageSize;11 var totalPages = Math.Max((totalCount + pageSize - 1) / pageSize, 1); //总页数12 var output = new StringBuilder();13 if (totalPages>0)14 {15 if (currentPageIndex != 1)16 { //处理首页链接17 output.AppendFormat("首页",pageSize);18 }19 if (currentPageIndex > 1)20 {//处理上一页的链接21 output.AppendFormat("上一页", currentPageIndex - 1,pageSize);22 }23 output.Append(" ");24 int currint = 5;25 for (int i = 0; i <=10; i++)26 {//一共最多显示10个页面，前面5个，后面5个27 if (currentPageIndex + i - currint > totalPages) //处理总页数少于10页28 {29 break;30 }31 if ((currentPageIndex + i-currint)>=1&&(currentPageIndex + i-currint)<=totalCount)32 {33 if (currint == i)34 { //当前页处理35 output.AppendFormat("{2}", currentPageIndex, pageSize, currentPageIndex);36 }37 else38 {//一般页处理39 output.AppendFormat("{2}", currentPageIndex + i-currint,pageSize, currentPageIndex + i-currint);40 }41 }42 output.Append(" ");43 }44 if (currentPageIndex < totalPages)45 {//处理下一页的链接46 output.AppendFormat("下一页", currentPageIndex + 1,pageSize);47 }48 output.Append(" ");49 if (currentPageIndex != totalPages)50 {51 output.AppendFormat("末页",totalPages,pageSize);52 }53 }54 output.AppendFormat("第{0}页/共{1}页", currentPageIndex, totalPages); //统计页数55 return output.ToString();56 }
1 a { 2 text-decoration: none; 3 } 4 5 .ep-pages { 6 padding: 10px 12px; 7 clear: both; 8 font-family: Arial, "\5B8B\4F53", sans-serif; 9 font-size: 14px;10 vertical-align: top;11 }12 13 .ep-pages a, .ep-pages span {14 display: inline-block;15 height: 23px;16 line-height: 23px;17 padding: 0 8px;18 margin: 5px 1px 0 0;19 background: #fff;20 border: 1px solid #e5e5e5;21 overflow: hidden;22 vertical-align: top;23 }24 25 .ep-pages a:hover {26 background: #cc1b1b;27 border: 1px solid #cc1b1b;28 text-decoration: none;29 }30 31 .ep-pages a, .ep-pages a:visited {32 color: #252525;33 }34 35 .ep-pages a:hover, .ep-pages a:active {36 color: #ffffff;37 }38 39 .ep-pages .current {40 background: #cc1b1b;41 border: 1px solid #cc1b1b;42 color: #fff;43 }44 45 .ep-pages a.current, .ep-pages a.current:visited {46 color: #ffffff;47 }48 49 .ep-pages a.current:hover, .ep-pages a.current:active {50 color: #ffffff;51 }52 53 .ep-pages-ctrl {54 font-family: "\5B8B\4F53", sans-serif;55 font-weight: bold;56 font-size: 16px;57 }58 59 .ep-pages-e5e5e5 {60 color: #e5e5e5;61 }62 63 .ep-pages-all {64 font-size: 12px;65 vertical-align: top;66 } 使用示例
效果图:
1 SELECT * FROM (select ROW_NUMBER() over (order by id) as row,TT.* from Main TT) TTT2 WHERE TTT.row BETWEEN 5 AND 103 4 模板：5 SELECT * FROM (select ROW_NUMBER() over (order by 排序字段) as row,TT.* from 表 TT) TTT6 WHERE TTT.row BETWEEN 第几条 AND 第几条
1 create proc P_LoadPageData 2 @pageIndex int, 3 @pageSize int, 4 @total int out 5 as 6 begin 7 --分页原理：越过多少条。取多少条 8 SELECT TOP(@pageIndex)* FROM Main WHERE id not in 9 (10 SELECT TOP((@pageIndex-1)*@pageSize) id FROM Main ORDER BY id11 )12 ORDER BY ID13 SELECT @total=COUNT(1) FROM Main14 SELECT @total15 end
1 create proc P_LoadPageData 2 @pageIndex int, 3 @pageSize int, 4 @total int out 5 as 6 begin 7 --分页原理：越过多少条。取多少条 8 SELECT TOP(@pageIndex)* FROM Main WHERE id not in 9 (10 SELECT TOP((@pageIndex-1)*@pageSize) id FROM Main ORDER BY id11 )12 ORDER BY ID13 SELECT @total=COUNT(1) FROM Main14 SELECT @total15 end16 17 --存储过程测试18 declare @total int19 exec P_LoadPageData 3,5,@total20 print @total
效果图
1 public ListLoadPageData(int pageIndex, int pageSize, out int total) 2 { 3 SqlParameter tal = new SqlParameter("@total", SqlDbType.Int); 4 tal.Direction = ParameterDirection.Output; //设置为输出参数 5 SqlParameter[] pms = new SqlParameter[] { 6 new SqlParameter("@pageIndex",SqlDbType.Int) {Value=pageIndex }, 7 new SqlParameter("@pageSize",SqlDbType.Int) {Value=pageSize }, 8 tal 9 };10 11 DataSet ds= SqlHelper.GetList("P_LoadPageData", CommandType.StoredProcedure, pms);12 total = (int)tal.Value; //拿到输出参数的值13 DataTable dt = ds.Tables[0];14 return Common.ToEntity.DtConvertToModel (dt);15 }
1 ///2 /// 执行sql语句或存储过程，返回DataSet 3 /// 4 /// 存储过程名称/sql语句 5 /// 执行类型 6 /// 可变参数 7 ///8 public static DataSet GetList(string procNameOrStrSql,CommandType cmdStoredProcedure, SqlParameter[] pms) 9 {10 try11 {12 13 using (SqlConnection conn=new SqlConnection(connStr))14 {15 using (SqlDataAdapter adap = new SqlDataAdapter(procNameOrStrSql, conn))16 {17 DataSet ds = new DataSet();18 //添加参数19 if (pms != null)20 {21 adap.SelectCommand.Parameters.AddRange(pms);22 }23 adap.SelectCommand.CommandType = cmdStoredProcedure;24 adap.Fill(ds);25 return ds;26 }27 }28 }29 catch (Exception ex)30 {31 WriteLog(procNameOrStrSql, ex);32 throw new Exception("错误内容:" + ex.Message.ToString());33 }34 }
1 ///2 /// 将DataTable转换成实体类 3 /// 4 ///实体类 5 /// DataTable 6 ///7 public static List DtConvertToModel (DataTable dt) where T:new() 8 { 9 List ts = new List ();10 foreach (DataRow dr in dt.Rows)11 {12 T t = new T();13 foreach (PropertyInfo pi in t.GetType().GetProperties())14 {15 if (dt.Columns.Contains(pi.Name))16 {17 if (!pi.CanWrite) continue;18 var value = dr[pi.Name];19 if (value!= DBNull.Value)20 {21 switch (pi.PropertyType.FullName)22 {23 case "System.Decimal":24 pi.SetValue(t, decimal.Parse(value.ToString()), null);25 break;26 case "System.String":27 pi.SetValue(t, value.ToString(), null);28 break;29 case "System.Int32":30 pi.SetValue(t, int.Parse(value.ToString()), null);31 break;32 default:33 pi.SetValue(t, value, null);34 break;35 }36 }37 } 38 }39 ts.Add(t);40 }41 return ts;42 }
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