bookinfo.aspx.cs

一个简单的网上书店

using System;
using System.Data;
using System.Configuration;
using System.Collections.Generic;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using BLL;
using BLL.interfaces;
using Model;

public partial class bookInfo : System.Web.UI.Page
{
    IReaderComments readerMessage = Factory.greatReaderComments();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack) 
        {
            if (Request["Id"] == null||Request["Id"].Equals(""))
                Response.Redirect("error.aspx");
            ViewState["id"] = int.Parse(Request["id"].ToString());
            showbookInfo();
            showreader();
        }
    }
    private void showbookInfo() 
    {
        IBook bookMessage = Factory.greatBook();
        List<Book> list = new List<Book>();
        list= bookMessage.selctBookInfo((int)ViewState["id"]);
        dtlbook.DataSource = list;
        dtlbook.DataBind();
    }
    private void showreader() 
    {
        IPage pagerMessage=Factory.greatPager();
    
        List<ReaderComments> list = new List<ReaderComments>();
        //int count=readerMessage.count();
        //Model.Page pager=pagerMessage.getPager(cruutenPager,mothed,count);
        list = readerMessage.selReaderC((int)ViewState["id"]);
        DataList1.DataSource = list;
        DataList1.DataBind();
    }
    protected void btnfb_Click(object sender, EventArgs e)
    {
        if (Session["userId"]==null)
            Response.Redirect("error.aspx?mes="+"游客不能发表评论");
        string contens = this.TextBox2.Text;
        ReaderComments rdc = new ReaderComments();
        rdc.BookId = (int)ViewState["id"];
        rdc.Comment = contens;
        rdc.UserId = int.Parse(Session["userId"].ToString());

        if (readerMessage.addReaderC(rdc))
        {
            ClientScript.RegisterStartupScript(typeof(string), "a", "alert('发表成功!')", true);
            showreader();
        }
        else 
        {
            Response.Redirect("error.aspx?mes="+"系统错误\\n发表失败!");
        }

    }

    private bool ex(DataTable dt,int id)
    {
        bool flag = false;
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            if (dt.Rows[i]["bookId"].ToString().Equals(id.ToString()))
            {
                dt.Rows[i]["Quantity"] = int.Parse(dt.Rows[i]["Quantity"].ToString()) + 1;
                int Quantity = int.Parse(dt.Rows[i]["Quantity"].ToString());
                int unitPrice = int.Parse(dt.Rows[i]["unitPrice"].ToString());
                dt.Rows[i]["Price"] = Quantity * unitPrice;
                flag = true;
            }
        }
        Session["ShopingCar"] = dt;
        return flag;
    }
    private void addTable(int id)
    {
        DataTable dt = new DataTable("shoping");
        dt.Columns.Add("number", typeof(int));
        dt.Columns.Add("bookId", typeof(int));
        dt.Columns.Add("Title", typeof(string));
        dt.Columns.Add("unitPrice", typeof(double));
        dt.Columns.Add("Quantity", typeof(double));
        dt.Columns.Add("Price", typeof(double));
        addRow(dt,id);
    }
    private void addRow(DataTable dt,int id)
    {
        DataRow row = dt.NewRow();
        row["number"] = dt.Rows.Count <= 0 ? 1 : dt.Rows.Count + 1;
        row["bookId"] = id;
        Label lblTitle=dtlbook.FindControl("lblTitle") as Label;
        Label lblUnitPrice = dtlbook.FindControl("lblUnitPrice") as Label;
        double unitPrice = Double.Parse(lblUnitPrice.Text.Trim());
        row["Title"] = lblTitle.Text;
        row["unitPrice"] = unitPrice;
        row["Quantity"] = 1;
        row["Price"] = unitPrice * 1;
        dt.Rows.Add(row);
        Session["ShopingCar"] = dt;
    }
    protected void btnbuydeng_Command(object sender, CommandEventArgs e)
    {
        if (Session["userId"] == null)
            ClientScript.RegisterStartupScript(typeof(string), "b", "alert('您上未登录\\n请快点登录吧!');window.location='login.aspx'", true);
        if (e.CommandName=="gg")
        {
            int id = int.Parse(e.CommandArgument.ToString());
            if (Session["ShopingCar"] != null)
            {
                DataTable dt = Session["ShopingCar"] as DataTable;
                if (!ex(dt,id))
                {
                  addRow(dt, id);
                }
            }
            else 
            {
                addTable(id);
                
            }
            ClientScript.RegisterStartupScript(typeof(string), "c", "alert('已经成功添加到您的购物车')", true);  
        }
    }
}