<%@ Page Title="商品详情" Language="
C#" MasterPageFile="~/Site
.Master" AutoEventWireup="true" CodeBehind="
WebForm3
.aspx
.cs" Inherits="
WebApplication1
.WebForm3" %>
<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<div class="product-container">
<asp:Image ID="imgProduct" runat="server" CssClass="product-image" />
<div class="product-info">
<h1><asp:Literal ID="ltProductName" runat="server" /></h1>
<div class="product-price">
<asp:Literal ID="ltPrice" runat="server" />
</div>
<div class="product-description">
<h3>商品描述</h3>
<asp:Literal ID="ltDescription" runat="server" />
</div>
<div class="product-stock">
<span>库存: </span>
<asp:Literal ID="ltStock" runat="server" />
</div>
<asp:Button ID="btnAddToCart" runat="server" Text="加入购物车"
CssClass="btn btn-primary" OnClick="btnAddToCart_Click" />
</div>
</div>
</asp:Content>
前端代码
using
System;
using
System.Data;
using
System.Data
.SqlClient;
using
System.Configuration;
namespace
WebApplication1
{
public partial class
WebForm3 :
System.Web.UI
.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
int productId;
if (int
.TryParse(Request
.QueryString["id"], out productId))
{
LoadProductDetails(productId);
}
else
{
Response
.Redirect("~/Default
.aspx");
}
}
}
private void LoadProductDetails(int productId)
{
string connString = ConfigurationManager
.ConnectionStrings["DB-NetShopsConnectionString"]
.ConnectionString;
using (SqlConnection conn = new SqlConnection(connString))
{
string query = @"SELECT p
.ProductID, p
.ProductName, p
.Description, p
.Price, p
.StockQuantity,
i
.ImagePath
FROM Products p
LEFT JOIN ProductImages i ON p
.ProductID = i
.ProductID
WHERE p
.ProductID = @ProductID";
SqlCommand cmd = new SqlCommand(query, conn);
cmd
.Parameters
.AddWithValue("@ProductID", productId);
try
{
conn
.Open();
SqlDataReader reader = cmd
.ExecuteReader();
if (reader
.Read())
{
ltProductName
.Text = reader["ProductName"]
.ToString();
ltDescription
.Text = reader["Description"]
.ToString();
ltPrice
.Text = $"{Convert
.ToDecimal(reader["Price"]):C}";
ltStock
.Text = reader["StockQuantity"]
.ToString();
if (!string
.IsNullOrEmpty(reader["ImagePath"]
.ToString()))
{
imgProduct
.ImageUrl = reader["ImagePath"]
.ToString();
}
}
reader
.Close();
}
catch (Exception ex)
{
// 记录错误日志
System.Diagnostics
.Debug
.WriteLine(ex
.Message);
}
}
}
protected void btnAddToCart_Click(object sender, EventArgs e)
{
int productId;
if (int
.TryParse(Request
.QueryString["id"], out productId))
{
// 添加到购物车的逻辑
// 可以使用Session
或数据库存储购物车信息
}
}
}
}
后端代码
解决
报错
本文讲述了如何在项目中添加System.Web引用以解决报错，包括找到正确版本路径、添加引用过程、版本设置技巧，以及处理引用带感叹号的情况。
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