​查询数据后，将数据分页显示

一、前台页面

                         Title                        查询                          

二、后台代码

 protected void Page_Load(object sender, EventArgs e)        {   string keywords = Request.QueryString["keywords"];              AspNetPager1.RecordCount = new DAL.title().GetCount(keywords);         }       //查询按钮        protected void btnSearch_Click(object sender, EventArgs e)        {    Response.Redirect("querypage.aspx?keywords=" + txtKeywords.Text);       }       //显示全部 protected void btn_all_Click(object sender, EventArgs e)        {    Response.Redirect("querypage.aspx");        }        //清空protected void btn_empty_Click(object sender, EventArgs e)        {  txtKeywords.Text = "";              this.RepList1.Controls.Clear();//清空当前内容              RepList1.DataSource = string.Empty;              RepList1.DataBind();              AspNetPager1.RecordCount = 0;       }       protected void AspNetPager1_PageChanged(object src, EventArgs e)        {     string keywords = Request.QueryString["keywords"];             txtKeywords.Text = keywords;              RepList1.DataSource = new DAL.title().SelectbyPage(keywords,AspNetPager1.StartRecordIndex.ToString(), AspNetPager1.EndRecordIndex.ToString());              RepList1.DataBind();        }

三、DAL代码

 //得到条件查询后的记录行数        public int GetCount(string strWhere)        {   StringBuilder strSql = new StringBuilder();            strSql.Append("select count(*) from title where");             strSql.Append(CombSqlTxt(strWhere));             return Convert.ToInt32(new SqlHelper().ExecuteScalar(strSql.ToString(), CommandType.Text));       } // 组合SQL查询语句==========================       protected string CombSqlTxt(string _keywords)        {   StringBuilder strTemp = new StringBuilder();             if (!string.IsNullOrEmpty(_keywords))            {     strTemp.Append(" title like '%" + _keywords + "%'");             }  else    {                    strTemp.Append(" 1=1");             }              return strTemp.ToString();       } //带有查询条件的分页 public DataTable SelectbyPage(string strWhere, string startIndex, string endIndex) //当前页的首条页码参数starIndex和最后页码参数endIndex {      StringBuilder strSql = new StringBuilder();              strSql.Append("with temptbl as ( SELECT ROW_NUMBER() OVER (ORDER BY id desc)AS Row, * from title where ");              strSql.Append(CombSqlTxt(strWhere));                //添加条件语句              strSql.Append(") SELECT * FROM temptbl where Row between @startIndex and @endIndex");              SqlParameter[] sqlParameters =  { new SqlParameter("@startIndex", startIndex),      new SqlParameter("@endIndex",endIndex)};            DataTable dt = new SqlHelper().ExecuteQuery(strSql.ToString(), sqlParameters, CommandType.Text); return dt;        }

四、效果图