文：不详 来源：互联网
在WEB开发中，分页是我们必须要解决的一个问题，今天我们一起来看看ASP.NET调用ORACEL存储过程实现分页的方法。
包定义：
create or replace package MaterialManage is
TYPE T_CURSOR IS REF CURSOR;
Procedure Per_QuickPage
(
TbName in varchar2, --表名
FieldStr in varchar2, --字段集
RowFilter in varchar2, --过滤条件
SortStr in varchar2, --排序集
RownumFieldStr in varchar2, --分页条件
TotalCount out number, --总记录数
Cur_ReturnCur out T_CURSOR --返回的游标
);
end MaterialManage; 包主体：
create or replace package body MaterialManage is
Procedure Per_QuickPage
(
TbName in varchar2, --表 名
FieldStr in varchar2, --字段集
RowFilter in varchar2, --过滤条件
SortStr in varchar2, --排序集
MinRowNum in number, --分页小值
MaxRowNum in number, --分页大值
TotalCount out number, --总记录数
Cur_ReturnCur out T_CURSOR
)
is
v_SourceTb1 varchar2(3000); --动态表名1
v_SourceTb2 varchar2(3000); --动态表名2
v_SourceTb3 varchar2(3000); --动态表名3
v_SourceTb4 varchar2(3000); --动态表名4
v_TotalCount varchar2(50); --总记录数
v_sql varchar2(3000); --动态sql
begin
v_SourceTb1 := ’’’’(select ’’’’|| FieldStr ||’’’’ from ’’’’|| TbName ||’’’’) SourceTb1’’’’;
v_SourceTb2 := ’’’’(select * from ’’’’|| v_SourceTb1 ||’’’’ where ’’’’|| RowFilter ||’’’’ ’’’’|| SortStr ||’’’’) SourceTb2’’’’;
v_SourceTb3 := ’’’’(select rownum as Rowindex,SourceTb2.* from ’’’’|| v_SourceTb2 ||’’’’ where rownum<=’’’’|| MaxRowNum ||’’’’) SourceTb3’’’’;
v_SourceTb4 := ’’’’(select * from ’’’’|| v_SourceTb1 ||’’’’ where ’’’’|| RowFilter ||’’’’) SourceTb4’’’’;
v_sql := ’’’’select count(*) as TotalCount from ’’’’|| v_SourceTb4;
execute immediate v_sql into v_TotalCount;
TotalCount := v_TotalCount;
v_sql := ’’’’select * from ’’’’|| v_SourceTb3 ||’’’’ where RowIndex >=’’’’||MinRowNum;
open Cur_ReturnCur for v_sql;
end Per_QuickPage;
END MaterialManage;
由于oracle有个rownum特性，所以分页的时候就是利用rownum来实现。如果大家还有什么更好的办法记得告诉我一声，多谢了，因为我测试了上面的分页方法效率并不是很高。
存储过程返回了两个参数：TotalCount ：当前条件下的总记录数 Cur_ReturnCur ：游标类型，就是所要读取的记录的集合
下面是ASP.NET中调用的代码：
{
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}" src="
" align="top" />/**//// <summary>
/// 调用存储过程实现快速分页
/// </summary>
/// <param name="TbName">表名称</param>
/// <param name="FieldStr">字段名称</param>
/// <param name="RowFilter">过滤条件</param>
/// <param name="SortStr">排序字段</param>
/// <param name="MinPageNum">分页小值</param>
/// <param name="MaxPageNum">分页大值</param>
/// <param name="TotalCount">总记录(需要返回)</param>
/// <returns>DataTable</returns>
public DataTable QuickPage(string TbName,string FieldStr,string RowFilter,string SortStr,int MinRowNum,int MaxRowNum,ref int RecordCount)
{
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}" src="
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}" src="
" align="top" />{
OracleConnection conn = new OracleConnection(ConfigurationSettings.AppSettings["OracleConnstr"].ToString());
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
cmd.CommandText = "MaterialManage.Per_QuickPage";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("TbName",OracleType.VarChar,50); //表 名
cmd.Parameters["TbName"].Direction = ParameterDirection.Input;
cmd.Parameters["TbName"].Value = TbName;
cmd.Parameters.Add("FieldStr",OracleType.VarChar,3000); //字段集
cmd.Parameters["FieldStr"].Direction = ParameterDirection.Input;
cmd.Parameters["FieldStr"].Value = FieldStr;
cmd.Parameters.Add("RowFilter",OracleType.VarChar,3000); //过滤条件
cmd.Parameters["RowFilter"].Direction = ParameterDirection.Input;
cmd.Parameters["RowFilter"].Value = RowFilter;
cmd.Parameters.Add("SortStr",OracleType.VarChar,3000); //排序字段
cmd.Parameters["SortStr"].Direction = ParameterDirection.Input;
cmd.Parameters["SortStr"].Value = SortStr;
cmd.Parameters.Add("MinRowNum",OracleType.Number); //分页小值
cmd.Parameters["MinRowNum"].Direction = ParameterDirection.Input;
cmd.Parameters["MinRowNum"].Value = MinRowNum;
cmd.Parameters.Add("MaxRowNum",OracleType.Number); //分页大值
cmd.Parameters["MaxRowNum"].Direction = ParameterDirection.Input;
cmd.Parameters["MaxRowNum"].Value = MaxRowNum;
cmd.Parameters.Add("TotalCount",OracleType.Number); //页总记录数
cmd.Parameters["TotalCount"].Direction = ParameterDirection.Output;
cmd.Parameters["TotalCount"].Value = 0;
cmd.Parameters.Add("Cur_ReturnCur",OracleType.Cursor); //返回的游标
cmd.Parameters["Cur_ReturnCur"].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["TotalCount"].Value.ToString());
return Ds.Tables[0];
}
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