StartIndexList实现算法分页

2015-04-05 22:00:01 访问(1272) 赞(0) 踩(0)

生成和输出的SQL语句

select * from (select t.ID, t.TheName, t.ClassId, 
t.CreateTime, t.UpdateTime,ROW_NUMBER() over (order by 
t.ID asc, t.TheName asc) as p__SqlRowNumberValue from UTB_EXAM_STUDENT t)slx where slx.p__SqlRowNumberValue > 5 and slx.p__SqlRowNumberValue <= 15

关键代码

DataSet ds = bll.StartIndexList
                (
                    5,
                    10,
                    entity, 
                    xdbHelper
                );

代码写法

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using SlowX.DAL.Helpers;
using SlowX.Core.ICoreClasses;
using System.Data;
using SlowX.Functions.Functions;
using SlowX.Core.CoreClasses;

public partial class ExamSQL : System.Web.UI.Page
{
    protected string strResult = "";

    protected void Page_Load(object sender, EventArgs e)
    {
        DataBindTheContorls(null);
    }

    #region 操作

    /// <summary>
    /// 
    /// </summary>
    /// <param name="xdbHelper"></param>
    protected void DataBindTheContorls(DBHelper xdbHelper)
    {
        string theResult = null;
        bool bIsCreate = true;

        if (xdbHelper == null)
        {
            xdbHelper = SlowX.DAL.Helpers.DBHelper.CreateDBHelper();
        }
        else
        {
            // 没有打开链接 //
            bIsCreate = xdbHelper.IsNotOpen();
        }

        try
        {
            if (bIsCreate)
                xdbHelper.OpenDBHelper();

            SlowX.ExamLib.Business.UTB_EXAM_STUDENT
                bll
                =
                SlowX.ExamLib.Business.UTB_EXAM_STUDENT.instance;

            SlowX.ExamLib.Entity.UTB_EXAM_STUDENT
                entity
                =
                new SlowX.ExamLib.Entity.UTB_EXAM_STUDENT();

            IOrderByDriver iorder = entity; 

            // 设置排序方式 //
            // ID ASC 
            iorder.AddIOrderByItemWithEntityFieldInfo
                (
                    entity._ID, 
                    SlowX.Core.Enums.OrderBy.EmOrderBy.ASC
                );

            // TheName ASC 
            iorder.AddIOrderByItemWithEntityFieldInfo
                (
                    entity._TheName, 
                    SlowX.Core.Enums.OrderBy.EmOrderBy.ASC
                );

            

            DataSet ds = bll.StartIndexList
                (
                    5,
                    10,
                    entity, 
                    xdbHelper
                );

            theResult =
                @"<textarea name=""TextBox1"" rows=""2"" cols=""20"" id=""TextBox1"" style=""height:400px;width:99%;"">"
                + bll.BuildSqlStartIndexList(5, 10, entity, xdbHelper)
                + "</textarea>";

            theResult += "<br /><br />";

            theResult += DataSetSlowXFunctions.DataSetToHtmlTable(ds, true);

            

            if (bIsCreate)
                xdbHelper.EndDBHelper();

        }
        catch (Exception err)
        {
            if (bIsCreate)
                xdbHelper.TranDBHelper();

            throw err;
        }
        finally
        {
            if (bIsCreate)
                xdbHelper.FinallyDBHelper();
        }

        strResult = theResult;
    }

    #endregion 操作

}