网上购物系统（Task003）——公共数据集Model

源代码：13033480群共享

一、把连接字符串放到Web.config文件中

  <connectionStrings>
    <add name="NetShopConnString" connectionString="server=.\SQLEXPRESS;database=NetShop;integrated security=SSPI;" providerName="System.Data.SqlClient"/>
  </connectionStrings>

二、添加类库Model，设置类库项目的程序集名称和默认命名空间 。

三、Model中添加类CategoryInfo.cs，代码如下：

using System;
using System.Collections.Generic;
using System.Text;

namespace WestGarden.Model
{
    public class CategoryInfo
    {
        private string categoryid;
        private string name;
        private string descn;

        public CategoryInfo() { }

        public CategoryInfo(string categoryid, string name, string descn)
        {
            this.categoryid = categoryid;
            this.name = name;
            this.descn = descn;
        }

        public string CategoryId
        {
            get { return categoryid; }
        }
        public string Name
        {
            get { return name; }
        }
        public string Descn
        {
            get { return descn; }
        }
    }
}

四、Web中添加引用→项目→Model，Defualt,aspx.cs中添加using WestGarden.Model;代码如下：

using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections.Generic;
using WestGarden.Model;

namespace WestGarden.Web
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            IList<CategoryInfo> catogories = new List<CategoryInfo>();

            string connectionString = ConfigurationManager.ConnectionStrings["NetShopConnString"].ConnectionString;
            string cmdText = "SELECT * FROM Category";

            SqlConnection conn = new SqlConnection(connectionString);

            SqlCommand cmd = new SqlCommand();
            cmd.Connection = conn;
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = cmdText;

            conn.Open();

            SqlDataReader rdr = cmd.ExecuteReader();
            while (rdr.Read())
            {
                CategoryInfo category=new CategoryInfo(rdr.GetString(0), rdr.GetString(1), rdr.GetString(2));
                catogories.Add(category);
            }

            rdr.Close();
            conn.Close();

            ddlCategories.DataSource = catogories;
            ddlCategories.DataTextField = "Name";
            ddlCategories.DataValueField = "CategoryId";
            ddlCategories.DataBind();
        }
    }
}

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