源代码：13033480群共享
一、数据访问层DAL
1、添加类库DAL，设置类库项目的程序集名称和默认命名空间；
2、在DAL中添加类Category.cs，设置类的属性为public；
3、在类Category.cs中添加函数GetCategories(),代码如下：
using System;
using System.Data;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using WestGarden.Model;
using WestGarden.DBUtility;
namespace WestGarden.DAL
{
public class Category
{
// Static constants
private const string SQL_SELECT_CATEGORIES = "SELECT CategoryId, Name, Descn FROM Category";
/// <summary>
/// Method to get all categories
/// </summary>
public IList<CategoryInfo> GetCategories()
{
IList<CategoryInfo> categories = new List<CategoryInfo>();
//Execute a query to read the categories
using (SqlDataReader rdr = SqlHelper.ExecuteReader(SqlHelper.ConnectionStringLocalTransaction, CommandType.Text, SQL_SELECT_CATEGORIES, null))
{
while (rdr.Read())
{
CategoryInfo cat = new CategoryInfo(rdr.GetString(0), rdr.GetString(1), rdr.GetString(2));
categories.Add(cat);
}
}
return categories;
}
}
}
函数GetCategories()要在SQLHelper中读取连接字符串，因此，需要在SQLHelper.cs中添加代码：
public static readonly string ConnectionStringLocalTransaction =ConfigurationManager.ConnectionStrings["NetShopConnString"].ConnectionString;
注意添加引用System.Configuration。
二、应用层Web
1、在Web中新建文件夹Controls并在其中添加用户控件NavigationControl.ascx，窗体页和代码页代码分别如下：
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="NavigationControl.ascx.cs" Inherits="WestGarden.Web.NavigationControl" %>
<%@ OutputCache Duration="100000" VaryByParam="*" %>
<asp:Repeater ID="repCategories" runat="server">
<HeaderTemplate>
<table cellspacing="0" border="0" style="border-collapse: collapse;">
</HeaderTemplate>
<ItemTemplate>
<tr>
<td class="<%= ControlStyle %>"><asp:HyperLink runat="server" ID="lnkCategory" NavigateUrl='<%# string.Format("~/Items.aspx?page=0&categoryId={0}", Eval("CategoryId")) %>' Text='<%# Eval("Name") %>' /><asp:HiddenField runat="server" ID="hidCategoryId" Value='<%# Eval("CategoryId") %>' /></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
using System;
using System.Web.UI.WebControls;
using WestGarden.DAL;
namespace WestGarden.Web {
public partial class NavigationControl : System.Web.UI.UserControl {
private string controlStyle;
protected string ControlStyle {
get { return controlStyle; }
}
protected void GetControlStyle() {
if (Request.ServerVariables["SCRIPT_NAME"].ToLower().IndexOf("default.aspx") > 0)
controlStyle = "navigationLinks";
else
controlStyle = "mainNavigation";
}
protected void Page_Load(object sender, EventArgs e) {
GetControlStyle();
BindCategories();
string categoryId = Request.QueryString["categoryId"];
if (!string.IsNullOrEmpty(categoryId))
SelectCategory(categoryId);
}
private void SelectCategory(string categoryId) {
foreach (RepeaterItem item in repCategories.Items) {
HiddenField hidCategoryId = (HiddenField)item.FindControl("hidCategoryId");
if(hidCategoryId.Value.ToLower() == categoryId.ToLower()) {
HyperLink lnkCategory = (HyperLink)item.FindControl("lnkCategory");
lnkCategory.ForeColor = System.Drawing.Color.FromArgb(199, 116, 3);
break;
}
}
}
private void BindCategories() {
Category category = new Category();
repCategories.DataSource = category.GetCategories();
repCategories.DataBind();
}
}
}
2、注意在Web中添加引用→项目→Model，并在代码页文件中using WestGarden.Model;
三、删除原来的Default.aspx，重新建一个空的Default.aspx，然后，直接把用户控件拖入到页面中。