请求在此上下文中不可用问题，控件作为参数

2013-10-30 12:15:28 200 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

FastAdmin分页失效排查指南：从ThinkPHP的paginate到前端控件的全链路分析本文针对FastAdmin框架中常见的分页失效问题，提供了一套从ThinkPHP的paginate方法到前端bootstrap-table控件的全链路排查指南。文章深入分析了在Model层调用paginate导致页码参数丢失的根本原因，并给出了五种解决方案，其中重点推荐在Model层通过显式传递page和limit参数实现手动分页的最佳实践，帮助开发者彻底解决分页控件失灵的技术难题。阅读详情

写了一个公共函数放在app_code中，但是在其他页面调用时报错：System.Web.HttpException: 请求在此上下文中不可用，求解。

app_code:bll.cs 主要是想把Repeater之类的控件作为函数参数用



   public void Paging(int totalrecord, int PageSize, int DigitNo, Control pagediv, Repeater rpt,string table,string id)

    {

        int CurrentPage, PageStart, PageEnd, TotalPage;

        //****************************************//计算总页数

        int pn1 = totalrecord / PageSize, pn2 = totalrecord % PageSize;

        if (pn2 != 0)

            TotalPage = pn1 + 1;

        else

            if (pn1 == 0)

                TotalPage = 1;

            else

                TotalPage = pn1;

        //****************************************

        if (Request.QueryString["page"] == null)//获取当前页码

            CurrentPage = 1;

        else

            CurrentPage = Convert.ToInt16(Request.QueryString["page"]);



        PageStart = 1;//起始数字逻辑判断

        if (CurrentPage >= DigitNo + 2)

            PageStart = CurrentPage - DigitNo;



        PageEnd = CurrentPage + DigitNo;//结束数字逻辑判断

        if (PageEnd > TotalPage + 1)

            PageEnd = TotalPage + 1;



        if (CurrentPage != 1)

        {

            HyperLink FP = new HyperLink();//生成首页文字按钮

            FP.Text = "首页"; FP.Style["color"] = "#06C";

            FP.NavigateUrl = "?page=1";

            HyperLink PP = new HyperLink();//生成上一页文字按钮

            PP.Text = "上一页"; PP.Style["color"] = "#06C";

            PP.NavigateUrl = "?page=" + (CurrentPage - 1);

            pagediv.Controls.Add(FP);//将文字分页按钮装入pagediv容器

            pagediv.Controls.Add(PP);

        }



        for (int i = PageStart; i < PageEnd; i++)//生成中间数字按钮，并进行相关判断

        {

            HyperLink no = new HyperLink();

            no.Text = i.ToString();

            no.NavigateUrl = "?page=" + i;

            no.CssClass = "pagediv";

            if (i == CurrentPage)

            {

                no.Enabled = false;

                no.CssClass = "current";

            }

            pagediv.Controls.Add(no);//将数字分页按钮装入pagediv容器

        }



        if (CurrentPage != TotalPage)

        {

            HyperLink LP = new HyperLink();//生成尾页文字按钮

            LP.Text = "尾页"; LP.Style["color"] = "#06C";

            LP.NavigateUrl = "?page=" + TotalPage;

            HyperLink NP = new HyperLink();//生成下一页文字按钮

            NP.Text = "下一页"; NP.Style["color"] = "#06C";

            NP.NavigateUrl = "?page=" + (CurrentPage + 1);

            pagediv.Controls.Add(NP);//将文字分页按钮装入pagediv容器

            pagediv.Controls.Add(LP);

        }

        //绑定数据库******************************降序排列

        int StartIndex = (CurrentPage - 1) * PageSize + 1;

        rpt.DataSource = DT("select top " + PageSize + " * from "+table+" where "+id+" <= (select min("+id+") from (select top " + StartIndex + " " + id + "  from "+table+" order by "+id+" desc)) order by "+id+" desc");

        rpt.DataBind();

    }

调用页面：.aspx.cs



    bll bl = new bll();

    int RecordNo() { return bl.CountData("select count(b_id) from bianmin"); }//记录总数



    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            bl.Paging(RecordNo(), 2, 5, pagediv, Repeater1, "bianmin", "b_id");

        }

    }

...全文