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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