网上购物系统（Task009）——FormView显示商品详细信息

源代码：13033480群共享

一、在数据库表Item中添加字段Descn、SupplyTime、SupplyDate、SupplyArea。因为除Descn，其它几个字段内容都差不多，所以，设置一下默认值，以后添加，更新数据库内容时，会更方便。二、在数据集Model类库中添加类ItemDetails.cs。

using System;

namespace WestGarden.Model
{
public class ItemDetails
{
private int itemid;
private string categoryid;
private string name;
private decimal price;
private string image;
private string categoryname;

private string descn;
private string supplytime;
private string supplydate;
private string supplyarea;

public ItemDetails() { }

public ItemDetails(int itemid, string categoryid, string name, decimal price, string image, string categoryname,
string descn, string supplytime,string supplydate,string supplyarea)
{
this.itemid = itemid;
this.categoryid = categoryid;
this.name = name;
this.price = price;
this.image = image;
this.categoryname = categoryname;

this.descn = descn;
this.supplytime = supplytime;
this.supplydate = supplydate;
this.supplyarea = supplyarea;
}

public int ItemId
{
get { return itemid; }
set { itemid = value; }
}
public string CategoryId
{
get { return categoryid; }
set { categoryid = value; }
}
public string Name
{
get { return name; }
set { name = value; }
}
public decimal Price
{
get { return price; }
set { price = value; }
}
public string Image
{
get { return image; }
set { image = value; }
}
public string CategoryName
{
get { return categoryname; }
set { categoryname = value; }
}

public string Descn
{
get { return descn; }
set { descn = value; }
}
public string SupplyTime
{
get { return supplytime; }
set { supplytime = value; }
}
public string SupplyDate
{
get { return supplydate; }
set { supplydate = value; }
}
public string SupplyArea
{
get { return supplyarea; }
set { supplyarea = value; }
}
}
}

三、在数据访问层DAL的Item.cs类中添加函数GetItemDetailsByItemId()

public IList<ItemDetails> GetItemDetailsByItemId(int ItemId)
{

IList<ItemDetails> itemDetailsByItemId = new List<ItemDetails>();

SqlParameter parm = new SqlParameter(PARM_ITEM_ID, SqlDbType.Int);
parm.Value = ItemId;

using (SqlDataReader rdr = SqlHelper.ExecuteReader(SqlHelper.ConnectionStringLocalTransaction, CommandType.Text, SQL_SELECT_ITEMDETAILS_BY_CATEGORY, parm))
{
while (rdr.Read())
{
ItemDetails item = new ItemDetails(rdr.GetInt32(0), rdr.GetString(1), rdr.GetString(2), rdr.GetDecimal(3), rdr.GetString(4), rdr.GetString(5),rdr.GetString(6),rdr.GetString(7),rdr.GetString(8),rdr.GetString(9));
itemDetailsByItemId.Add(item);
}
}
return itemDetailsByItemId;
}

四、Controls中添加用户控件ItemDetailsControl.ascx

1、前台代码：

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ItemDetailsControl.ascx.cs" Inherits="WestGarden.Web.ItemDetailsControl" %>
<%@ Register TagPrefix="WestGardenControl" Namespace="WestGarden.Web" %>
<div>
<asp:FormView ID="fvwItemDetails" runat="server">
<ItemTemplate>
<table cellpadding="0" cellspacing="0">
<tr>
<td height="18" width="18">
</td>
<td height="18" width="96">
</td>
<td height="18" width="18">
</td>
<td height="18" width="96">
</td>
<td height="18" width="180">
</td>
</tr>
<tr>
<td width="18">
</td>
<td rowspan="7" width="96">
<asp:Image Width="144" Height="144" ID="imgItem" ImageUrl='<%# Eval("Image") %>'
AlternateText='<%# Eval("Name") %>' runat="server" /></td>
<td width="18">
</td>
<td width="96">
商品类别：</td>
<td width="180">
<%# Eval("CategoryName") %>
</td>
</tr>
<tr>
<td width="18">
</td>
<td width="18">
</td>
<td width="96">
商品名称：</td>
<td width="180">
<%# Eval("Name") %>
</td>
</tr>
<tr>
<td width="18">
</td>
<td width="18">
</td>
<td width="96">
商品价格：</td>
<td width="180">
<%# Eval("Price") %>
</td>
</tr>
<tr>
<td width="18">
</td>
<td width="18">
</td>
<td width="96">
商品描述：</td>
<td width="180">
<%# Eval("Descn") %>
</td>
</tr>
<tr>
<td width="18">
</td>
<td width="18">
</td>
<td width="96">
供应时间：</td>
<td width="180">
<%# Eval("SupplyTime") %>
</td>
</tr>
<tr>
<td width="18">
</td>
<td width="18">
</td>
<td width="96">
供应日期：</td>
<td width="180">
<%# Eval("SupplyDate") %>
</td>
</tr>
<tr>
<td width="18">
</td>
<td width="18">
</td>
<td width="96">
供应地区：</td>
<td width="180">
<%# Eval("SupplyArea") %>
</td>
</tr>
<tr>
<td height="18" width="18">
</td>
<td height="18" width="96">
</td>
<td height="18" width="18">
</td>
<td height="18" width="96">
</td>
<td height="18" width="180">
</td>
</tr>
</table>
</ItemTemplate>
</asp:FormView>
</div>
<div><a href='Items.aspx?categoryId=<%=Request.QueryString["categoryId"] %>'>< 返回</a></div>

2、后台代码

using System;
using System.Web;
using System.Web.UI.WebControls;
using WestGarden.DAL;

namespace WestGarden.Web
{
public partial class ItemDetailsControl : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
int itemKey = int.Parse(Request.QueryString["itemId"]);

Item item = new Item();
fvwItemDetails.DataSource = item.GetItemDetailsByItemId(itemKey);
fvwItemDetails.DataBind();
}
}
}

五、Web中添加窗体ItemDetails.aspx并选择母版页MasterPage.master，拖入用户控件ItemDetailsControl.ascx，并在Page_Load()函数中添加代码：

protected void Page_Load(object sender, EventArgs e)
{
Page.Title = WebUtility.GetCategoryName(Request.QueryString["categoryId"]);
}

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