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();
}
}
}