利用Request对象的CurrentExecutionFilePath做分页

CurrentExecutionFilePath的解释上：获取当前请求的虚拟路径。

见代码：

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            databind();
            this.HyperLink1.Visible = true;
            this.HyperLink4.Visible = true;
        }
    }
    public void databind()
    {
        SqlConnection con = new SqlConnection(@"Data Source=.\sqlexpress;Initial Catalog=Northwind;Integrated Security=True");
        SqlCommand cmd = new SqlCommand("select * from Customers", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        PagedDataSource ps = new PagedDataSource();
        ps.DataSource = ds.Tables[0].DefaultView;
        ps.AllowPaging = true;
        int pageIndex;
        if (Request.QueryString["page"] == null)
        {
            pageIndex = 0;
        }
        else
        {
            pageIndex = Convert.ToInt32(Request.QueryString["page"]);
        }
        ps.CurrentPageIndex = pageIndex;
        this.Label1.Text =Convert.ToString( pageIndex + 1);
        this.Label2.Text = ps.PageCount.ToString();
        this.HyperLink1.NavigateUrl = Request.CurrentExecutionFilePath + "?page=0";
        if (pageIndex <= 0)
        {
            this.HyperLink2.NavigateUrl = Request.CurrentExecutionFilePath + "?page=0"; 
        }
        else
        {
            this.HyperLink2.NavigateUrl = Request.CurrentExecutionFilePath + "?page=" + Convert.ToString(pageIndex - 1);
        }
        this.HyperLink4.NavigateUrl = Request.CurrentExecutionFilePath + "?page=" + Convert.ToString(Convert.ToInt32(this.Label2.Text) - 1);
        if ((pageIndex+1) >= Convert.ToInt32(this.Label2.Text))
        
        {
            this.HyperLink3.NavigateUrl = Request.CurrentExecutionFilePath + "?page=" + Convert.ToString(Convert.ToInt32(this.Label2.Text) - 1);
        }
        else
        {
            this.HyperLink3.NavigateUrl = Request.CurrentExecutionFilePath + "?page=" + Convert.ToString(pageIndex + 1);
        }
        this.GridView1.DataSource = ps;
        this.GridView1.DataBind();
    }

前台：

<div>
            <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
                <Columns>
                    <asp:BoundField DataField="CustomerID" HeaderText="CustomerID" />
                    <asp:BoundField DataField="CompanyName" HeaderText="CompanyName" />
                    <asp:BoundField DataField="ContactName" HeaderText="ContactName" />
                    <asp:BoundField DataField="ContactTitle" HeaderText="ContactTitle" />
                </Columns>
            </asp:GridView>
            <asp:HyperLink ID="HyperLink1" runat="server">首页</asp:HyperLink>
            <asp:HyperLink ID="HyperLink2" runat="server">上一页</asp:HyperLink>
            <asp:HyperLink ID="HyperLink3" runat="server">下一页</asp:HyperLink>
            <asp:HyperLink ID="HyperLink4" runat="server">尾页</asp:HyperLink>
            当前页为:<asp:Label ID="Label1" runat="server" Text="1"></asp:Label>
            总共<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>页
        </div>