ASP.NET分页存储过程，解决搜索时丢失条件信息

存储过程：

-- =============================================
-- Author:
-- Create date:
-- Description:    分页
--Update Date:
--增加了默认排序规则，根据主键升序（防止在视图查询中乱号）
-- =============================================
ALTER PROCEDURE [dbo].[getdatabyPageIndex]
@tablename nvarchar(200),
@columns nvarchar(500)='*',
@condition nvarchar(200)='',
@pagesize int=10,
@pageindex int=0,
@pk nvarchar(30),
@total int output, --统计总共的条数
@orderculumn nvarchar(50)=@pk,
@isasc nvarchar(10)='desc'

AS
BEGIN
    DECLARE @sql nvarchar(2000)
    SET @sql='select top '+cast(@pagesize AS nvarchar(10))+' '+@columns+' from '+@tablename+' where '+
    @pk+' not in (select top '+cast((@pagesize*@pageindex) AS nvarchar(10))+
    ' '+@pk+' from '+@tablename +' where 1=1 '+@condition+' order by '+@orderculumn+' '+@isasc+')'+@condition +' order by '+@orderculumn+' '+@isasc
     PRINT @sql
        EXEC(@sql)
        DECLARE @sql2 nvarchar(2000)
        SET  @sql2='SELECT @total1 = count(*) FROM '+ @tablename+' WHERE 1=1 '+ @condition
        EXEC sp_executesql @sql2,N'@total1 int output',@total output

END

.cs：

      /// <summary>
      /// 分页功能
      /// </summary>
      /// <param name="tablename">表名</param>
      /// <param name="columns">列名</param>
      /// <param name="condition">条件,不需要带where</param>
      /// <param name="pagesize">每页显示条数</param>
      /// <param name="pageindex">页码</param>
      /// <param name="pk">主键</param>
      /// <returns>DataTable</returns>
      public DataTable getdatabyPageIndex(string tablename, string columns, string condition, int pagesize, int pageindex, string pk,out int totalcount,string ordercolumn,string isasc)
      {
          string order = "";
          if (ordercolumn == null)
          {
              order = pk;
          }

          string asc = "";
          if (isasc == null)
          {
              isasc = "desc";
          }

        SqlParameter[] pars = new SqlParameter[]{
         new SqlParameter("@tablename",tablename),
         new SqlParameter("@columns",columns),
         new SqlParameter("@condition",condition),
         new SqlParameter("@pagesize",pagesize),
         new SqlParameter("@pageindex",pageindex),
         new SqlParameter("@pk",pk),
         new SqlParameter("@total",SqlDbType.Int),
         new SqlParameter("@orderculumn",ordercolumn),
         new SqlParameter("@isasc",isasc)
       };
         pars[].Direction = ParameterDirection.Output;
         DataTable dt= db.ExcuteSelectReturnDataTable("sp_getdatabyPageIndex", CommandType.StoredProcedure, pars);
         totalcount=  int.Parse(pars[].Value.ToString());
         return dt;
      }

        /// <summary>
        /// 执行一个Select语句或者相应的存储过程实现返回数据集合DataSet
        /// </summary>
        /// <param name="SelectStr">执行一个Select语句或者相应的存储过程</param>
        /// <param name="type">指定命令类型</param>
        /// <param name="pars">相应参数集合</param>
        /// <returns>DataSet</returns>
        public DataSet ExcuteSelectReturnDataSet(string SelectStr, CommandType type, SqlParameter[] pars)
        {
            DataSet ds = new DataSet();
            SqlConnection conn = new SqlConnection(ConnString);
            SqlDataAdapter sda = new SqlDataAdapter(SelectStr, conn);
            if (pars != null && pars.Length > )
            {
                foreach (SqlParameter p in pars)
                {
                    sda.SelectCommand.Parameters.Add(p);
                }
            }
            sda.SelectCommand.CommandType = type;
            sda.Fill(ds);
            return ds;
        }

.aspx：

    <style type="text/css">
        .pages {  color: #; width:%;  height:25px;}
        .pages a, .pages .cpb { text-decoration:none; padding:  5px; border: 1px solid #ddd; background: #ffff;margin: 2px; font-size:12px; color:#; height:20px}
        .pages a:hover { background-color: #2F7EAE; color:#fff;border:1px solid #2F7EAE; text-decoration:none;}
        .pages .cpb { font-weight: bold; color: #fff; background: #2F7EAE; border:1px solid #2F7EAE; height:20px}
    </style>

<asp:HiddenField ID="hidden" runat="server" Value=" " />

<asp:Repeater ID="rptProlist" runat="server" onitemdatabound="rptProlist_ItemDataBound">
            <HeaderTemplate>
                <table border="" class="infolist" cellpadding="" cellspacing="">
                    <thead>
                        <tr>
                            <th width="4%">序号</th>
                            <th>项目名称</th>
                            <th width="10%">开始日期</th>
                            <th width="10%">预计结束日期</th>
                            <th width="10%">项目状态</th>
                            <th width="7%">创建人</th>
                            <th width="7%">负责人</th>
                            <th width="20%">参与人</th>
                            <th style="border-right:1px solid #999999;" width="10%">实际结束日期</th>
                        </tr>
                    </thead>
                <tbody>
            </HeaderTemplate>
            <ItemTemplate>
                    <tr>
                        <td><%#Eval("ProjectID") %></td>
                        <td><a href="projectdetails.aspx?id=<%#Eval("ProjectID") %>"><%#Eval("ProjectName") %></a></td>
                        <td><%#Eval("StartDate","{0:yyyy-MM-dd}")%></td>
                        <td><%#Eval("ExpectedEndDate","{0:yyyy-MM-dd}")%></td>
                        <td><%#Eval("ProjectState")%></td>
                        <td><%#returnUserRealName(Eval("ProjectCreater").ToString())%></td>
                        <td><%#returnUserRealName(Eval("ProjectPrincipal").ToString())%></td>
                        <td><asp:Label ID="lbPlayers" runat="server" Text='<%#Eval("ProjectPlayers") %>'></asp:Label></td>
                        <td style="border-right:1px solid #999999;">&nbsp;<%#Eval("EndDate","{0:yyyy-MM-dd}")%>&nbsp;</td>
                    </tr>
            </ItemTemplate>
            <FooterTemplate>
                </tbody>
                </table>
            </FooterTemplate>
        </asp:Repeater>

<webdiyer:AspNetPager ID="AspNetPager1" runat="server" firstpagetext="首页" lastpagetext="尾页"
                       nextpagetext="下一页" numericbuttoncount=""
                pageindexboxtype="DropDownList" prevpagetext="上一页"
                       showcustominfosection="Left" showpageindexbox="Always"
                submitbuttontext="Go" textafterpageindexbox="页"
                       textbeforepageindexbox="转到" AlwaysShow="True" CustomInfoHTML="第%CurrentPageIndex%/%PageCount%页，每页%PageSize%条，共%RecordCount%条信息"
                       LayoutType="Table"  CssClass="pages" CustomInfoClass="paginator" CurrentPageButtonClass="cpb"
                            Height="30px" CustomInfoSectionWidth="" Wrap="False"
                      OnPageChanging="AspNetPager1_PageChanging"
                Width="660px" onpagechanged="AspNetPager1_PageChanged">
            </webdiyer:AspNetPager>

.aspx.cs：

        //string condition = "  ";
        //每页条数
        int pagesize = ;
        //总共条数
        int recordCount = ;
        //第几页
        int pageindex = ;

        public void getProlist()
        {
            string condition = hidden.Value;
            rptProlist.DataSource = new PM.BLL.tb_Project().getdatabyPageIndex("tb_Project", "*", condition, pagesize, pageindex, "ProjectID", out recordCount, null, null);
            rptProlist.DataBind();
            AspNetPager1.RecordCount = recordCount;
            AspNetPager1.PageSize = pagesize;
        }

        /// <summary>
        /// 搜索
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnSearch_Click(object sender, EventArgs e)
        {
            string proName = txtProName.Text.Trim();
            string proState = ddlState.SelectedItem.Text;
            int proPrincipal = Convert.ToInt32(ddlPrincipal.SelectedValue);
            int proCreater = Convert.ToInt32(ddlCreater.SelectedValue);
            string proNotes = txtNotes.Text;

            StringBuilder sb = new StringBuilder();
            if (!string.IsNullOrEmpty(proName))
            {
                sb.Append(" and ProjectName like '%" + proName + "%'");
            }
            if (ddlState.SelectedValue != "-1")
            {
                sb.Append(" and ProjectState='" + proState + "'");
            }
            if (proPrincipal != -)
            {
                sb.Append(" and ProjectPrincipal='" + proPrincipal + "'");
            }
            if (proCreater != -)
            {
                sb.Append(" and ProjectCreater='" + proCreater + "'");
            }
            if (!string.IsNullOrEmpty(txtStartDate.Text.Trim()) && !string.IsNullOrEmpty(txtEndDate.Text.Trim()))
            {
                sb.Append(" and (StartDate >= '" + Convert.ToDateTime(txtStartDate.Text).ToString("yyyy-MM-dd") + "' and StartDate <= '" + Convert.ToDateTime(txtEndDate.Text).ToString("yyyy-MM-dd") + "')");
            }
            if (!string.IsNullOrEmpty(proNotes))
            {
                sb.Append(" and ProjectNotes like '%" + proNotes + "%' ");
            }
            hidden.Value = Convert.ToString(sb);
            string condition = Convert.ToString(sb);
            pageindex = ;
            getProlist();
        }

        protected void AspNetPager1_PageChanging(object src, Wuqi.Webdiyer.PageChangingEventArgs e)
        {
            AspNetPager1.CurrentPageIndex = e.NewPageIndex;
            getProlist();
        }

        protected void AspNetPager1_PageChanged(object sender, EventArgs e)
        {
            pageindex = this.AspNetPager1.CurrentPageIndex - ;
            getProlist();
        }

把搜索条件存储在隐藏域中