自家用的DataReapter分页代码

还没写完善的东西。所以直接在里面修改参数。
使用时

DataTabel dt =...
PageReapter pr = new PageReapter();
pr.DataSource = dt.DefaultView;
Repeater1.DataSource = pr.PagedData;
Repeater1.DataBind();
ltrDLPageText.Text = pr.DefaultText;

using System;
using System.Web;
using System.Data;
using System.Text;
namespace RMB.BLL
{
    /// <summary>
    /// PageReapter 的摘要说明。
    /// </summary>
    public class PageReapter
    {

        private int _pagesize = 15;
        private int _curpage;

        private int prvpage,nextpage;
        private string urlparams;
        private System.Web.UI.WebControls.PagedDataSource _objpds;

        public System.Web.UI.WebControls.PagedDataSource PagedData
        {
            get
            {
                return _objpds;
            }
        }

        public DataView DataSource
        {
            set
            {
                _objpds = new System.Web.UI.WebControls.PagedDataSource();
                _objpds.DataSource = value;
                _objpds.AllowPaging = true;
                _objpds.PageSize = _pagesize;
                if(System.Web.HttpContext.Current.Request.QueryString["page"] != null)
                {
                    try
                    {
                        _curpage = Convert.ToInt32(System.Web.HttpContext.Current.Request.QueryString["page"]);
                    }
                    catch
                    {
                        _curpage = 1;
                    }
                    if(_curpage < 1)
                        _curpage = 1;
                    if(_curpage > _objpds.PageCount)
                        _curpage = _objpds.PageCount;
                }
                else
                {
                    _curpage = 1;
                }


                if(_curpage > 0)
                    prvpage = _curpage - 1;
                else
                    prvpage = 1;

                if(_objpds.PageCount - _curpage > 0)
                    nextpage = _curpage + 1;
                else
                    nextpage = _curpage;

                _objpds.CurrentPageIndex = _curpage - 1;

                urlparams = this.GetUrlParams();
            }
        }
        public string DefaultText
        {
            get
            {
                StringBuilder objSb = new StringBuilder();
                if(_curpage > 1)
                {
                    objSb.Append("<a href=\"?"+ urlparams +"1\">首页</a> ");
                    objSb.Append("<a href=\"?"+ urlparams + prvpage +"\">上一页</a>");
                }
                else
                {
                    objSb.Append("首页上一页");
                }

                objSb.Append("\n"+ this.SelectText +"\n");
                if(_objpds.PageCount - _curpage > 0)
                {
                    objSb.Append("<a href=\"?"+ urlparams + nextpage +"\">下一页</a> ");
                    objSb.Append("<a href=\"?"+ urlparams + _objpds.PageCount +"\">尾页</a>");
                }
                else
                {
                    objSb.Append("下一页尾页");
                }
                objSb.Append("\n "+_objpds.DataSourceCount+"条记录每页"+ _pagesize +"条记录");
                objSb.Append(" 共"+ _objpds.PageCount +"页\n");
                return objSb.ToString();
            }
        }
        public string SelectText
        {
            get
            {
                StringBuilder objSb = new StringBuilder();
                objSb.Append("<select name=\"page\" style=\"font-size:10px;\" onChange=\"javascript:location.href='?'+this.options[selectedIndex].value\">\n");
                for(int i=1; i<_objpds.PageCount + 1; i++)
                {
                    objSb.Append("<option value=\""+ urlparams + i +"\"");
                    if(_curpage == i)
                        objSb.Append("selected");
                    objSb.Append(">"+ i +"</option>\n");
                }
                objSb.Append("</select>\n");
                return objSb.ToString();
            }
        }
        private string GetUrlParams()
        {
            string searchKey = "page=";
            string urlParams = System.Web.HttpContext.Current.Request.QueryString.ToString();
            if(urlParams == null && urlParams.Length < 1)
                return searchKey;
            urlParams = urlParams.Replace("&page=", "page=");
            if(urlParams.IndexOf("page=") > 0)
                urlParams = urlParams.Substring(0,urlParams.IndexOf("page="));
            return urlParams + "&" + searchKey;
        }
        public int PageSize
        {
            get
            {
                return _pagesize;
            }
            set
            {
                _pagesize = value;
            }
        }

    }
}