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CREATE OR REPLACE PROCEDURE prc_query (p_tableName in varchar2, --表名 p_strWhere in varchar2, --查询条件 p_orderColumn in varchar2, --排序的列 p_orderStyle in varchar2, --排序方式 p_curPage in out Number, --当前页 p_pageSize in out Number, --每页显示记录条数 p_totalRecords out Number, --总记录数 p_totalPages out Number, --总页数 v_cur out pkg_query.cur_query) --返回的结果集 IS v_sql VARCHAR2(1000) := ‘‘; --sql语句 v_startRecord Number(4); --开始显示的记录条数 v_endRecord Number(4); --结束显示的记录条数 BEGIN --记录中总记录条数 v_sql := ‘SELECT TO_NUMBER(COUNT(*)) FROM ‘ || p_tableName || ‘ WHERE 1=1‘; IF p_strWhere IS NOT NULL or p_strWhere <> ‘‘ THEN v_sql := v_sql || p_strWhere; END IF; EXECUTE IMMEDIATE v_sql INTO p_totalRecords; --验证页面记录大小 IF p_pageSize < 0 THEN p_pageSize := 0; END IF; --根据页大小计算总页数 IF MOD(p_totalRecords,p_pageSize) = 0 THEN p_totalPages := p_totalRecords / p_pageSize; ELSE p_totalPages := p_totalRecords / p_pageSize + 1; END IF; --验证页号 IF p_curPage < 1 THEN p_curPage := 1; END IF; IF p_curPage > p_totalPages THEN p_curPage := p_totalPages; END IF; --实现分页查询 v_startRecord := (p_curPage - 1) * p_pageSize + 1; v_endRecord := p_curPage * p_pageSize; v_sql := ‘SELECT * FROM (SELECT A.*, rownum r FROM ‘ || ‘(SELECT * FROM ‘ || p_tableName; IF p_strWhere IS NOT NULL or p_strWhere <> ‘‘ THEN v_sql := v_sql || ‘ WHERE 1=1‘ || p_strWhere; END IF; IF p_orderColumn IS NOT NULL or p_orderColumn <> ‘‘ THEN v_sql := v_sql || ‘ ORDER BY ‘ || p_orderColumn || ‘ ‘ || p_orderStyle; END IF; v_sql := v_sql || ‘) A WHERE rownum <= ‘ || v_endRecord || ‘) B WHERE r >= ‘ || v_startRecord; DBMS_OUTPUT.put_line(v_sql); OPEN v_cur FOR v_sql; END prc_query;
3.在数据层中调用存储过程,返回一个datatable及二个参数,datatable存储数据,curPage为当前页码(存储过程会根据传入的数值查询数据,返回datatable。),pageCount为总页数, RecordCount为数据总条数
public class Paging { /// <summary> /// /// </summary> /// <param name="tName">表 名</param> /// <param name="strSql">查询条件</param> /// <param name="sortRow">排序的列</param> /// <param name="sortMethod">排序方式</param> /// <param name="curPage">当前页</param> /// <param name="pageSize">每页显示记录条数</param> /// <param name="pageCount">总页数</param> /// <param name="RecordCount">总记录数</param> /// <returns></returns> public DataTable QuickPage(string tName, string strSql, string sortRow, string sortMethod, int curPage, int pageSize, ref int pageCount, ref int RecordCount) { OracleConnection conn = new OracleConnection("server=.;Data Source=db;User ID=zsxl1;Password=zsxl;"); OracleCommand cmd = new OracleCommand(); cmd.Connection = conn; cmd.CommandText = "prc_query"; cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("p_tableName", OracleType.VarChar, 50); //表 名 cmd.Parameters["p_tableName"].Direction = ParameterDirection.Input; cmd.Parameters["p_tableName"].Value = tName; cmd.Parameters.Add("p_strWhere", OracleType.VarChar, 3000); //查询条件 cmd.Parameters["p_strWhere"].Direction = ParameterDirection.Input; cmd.Parameters["p_strWhere"].Value = strSql; cmd.Parameters.Add("p_orderColumn", OracleType.VarChar, 3000); //排序的列 cmd.Parameters["p_orderColumn"].Direction = ParameterDirection.Input; cmd.Parameters["p_orderColumn"].Value = sortRow; cmd.Parameters.Add("p_orderStyle", OracleType.VarChar, 3000); //排序方式 cmd.Parameters["p_orderStyle"].Direction = ParameterDirection.Input; cmd.Parameters["p_orderStyle"].Value = sortMethod; cmd.Parameters.Add("p_curPage", OracleType.Number); //当前页 cmd.Parameters["p_curPage"].Direction = ParameterDirection.Input; cmd.Parameters["p_curPage"].Value = curPage; cmd.Parameters.Add("p_pageSize", OracleType.Number); //每页显示记录条数 cmd.Parameters["p_pageSize"].Direction = ParameterDirection.Input; cmd.Parameters["p_pageSize"].Value = pageSize; cmd.Parameters.Add("p_totalRecords", OracleType.Number); //总记录数 cmd.Parameters["p_totalRecords"].Direction = ParameterDirection.Output; cmd.Parameters["p_totalRecords"].Value = 0; cmd.Parameters.Add("p_totalPages", OracleType.Number); //总页数 cmd.Parameters["p_totalPages"].Direction = ParameterDirection.Output; cmd.Parameters["p_totalPages"].Value = 0; cmd.Parameters.Add("v_cur", OracleType.Cursor); //返回的游标 cmd.Parameters["v_cur"].Direction = ParameterDirection.Output; DataSet Ds = new DataSet(); OracleDataAdapter adapter = new OracleDataAdapter(cmd); adapter.Fill(Ds); conn.Close(); //总记录数 RecordCount = int.Parse(cmd.Parameters["p_totalRecords"].Value.ToString()); //总页数 pageCount = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(cmd.Parameters["p_totalPages"].Value.ToString()))); //当前页码 //curPage = int.Parse(cmd.Parameters["p_curPage"].Value.ToString()); //TotalPages = int.Parse(cmd.Parameters["p_totalPages"].Value.ToString()); return Ds.Tables[0]; } }
4.表现层调用方法QuickPage
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原文地址:http://www.cnblogs.com/hnsongbiao/p/4246321.html