Web/books/Add.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;
using System.Text;
using System.Data.SqlClient;

public partial class books_Add : 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();


        }
    }
    protected void btnAdd_Click(object sender, EventArgs e)
    {

        if(bll.Exists(txt_bno.Text))
        {
            MessageBox.Show(this, "该ISBN编号已存在，请重新输入！");
            return;
        }

        BS.Model.books model = new BS.Model.books();
        model.bno =txt_bno.Text;
        model.bname =txt_bname.Text;
        model.tid =int.Parse( ddltid.SelectedValue);
        model.author =txt_author.Text;


      DataPage dp =new  DataPage();
        string addr ="";
        string lj = Server.MapPath("~/uploads/");
        if (fppic.HasFile)
        {
            string pic = dp.fl_up(fppic, lj);
            if (pic.Length > 3)
            {
                addr = pic;
            }
        }
        model.pic =addr;
        model.pub =txt_pub.Text;
        model.pubdate =txt_pubdate.Text;