Web/books/Index2.aspx.cs

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

public partial class books_Index : PageBase
{
    BS.BLL.books bll = new BS.BLL.books();
    BS.BLL.bookType bll2 = new BS.BLL.bookType();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            DataSet ds = bll2.GetAllList();
            ddltid.DataSource = ds;
            ddltid.DataTextField = "tname";
            ddltid.DataValueField = "tid";
            ddltid.DataBind();
            ddltid.Items.Insert(0, new ListItem("---全部---", ""));


            BindData();
        }
    }

    // 绑定
    private void BindData()
    {       
        string where = "  1=1 ";

        if (txt_bname.Text != "")
        {
            where += " and bname like '%" + txt_bname.Text + "%' ";
        }

        if (ddltid.SelectedValue!= "")
        {
            where += " and a.tid=" + ddltid.SelectedValue + "";
        }



        GridView1.DataSource = bll.GetList(where);
        GridView1.DataBind();

    }

    /// <summary>
    /// 分页事件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {