学步园

使用主题：

web.config中对所有页面应用主题

<!-- ********** 对所有页面应用某个主题 star ********** -->
   <pages theme="Yellow" masterPageFile="~/Master/MasterPage.master" />
<!-- ********** 对所有页面应用某个主题 end ********** -->

对某个页面应用主题

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Master_Default" MasterPageFile="~/Master/MasterPage.master" Title="使用通用母板页的内容页面1" Theme="Yellow" %>

主题文件结构：

- App_Themes                 //主题文件夹 

     - Default                     //Default 主题文件夹

           -Images               //存放图片

           -Controls.skin      //定义控件皮肤样式

           -Default.css         //CSS

     - Yellow

           -Images

           -Controls.skin

           -Default.css

Controls.skin中定义：

<asp:TextBox runat="server" BorderStyle="dashed" BorderWidth="2px" />

ThemesSelector.ascx主题选择自定义控件

页面：

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ThemesSelector.ascx.cs" Inherits="Themes_Controls_ThemesSelector" %></p> <p><b>选择主题：</b><br /> <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true"><br /> </asp:DropDownList>

后台代码：

public static class ThemesSelect_Globals<br /> {<br /> //静态属性记录自定义控件ThemesSelector的DropDownList的ID<br /> public static string ThemesSelectorID = "";<br /> }</p> <p>//Caching<br /> using System.Web.Caching;</p> <p>/// <summary><br /> /// 创建常用方法的静态类Helpers<br /> /// </summary><br /> public static class Helpers<br /> {<br /> //获取App_Themes文件夹中定义的各主题路径数组<br /> public static string[] GetThemes()<br /> {<br /> //缓存中存在<br /> if (HttpContext.Current.Cache["SiteThemes"] != null)<br /> {<br /> //从缓存中获取数组数据<br /> return (string[])HttpContext.Current.Cache["SiteThemes"];<br /> }<br /> //缓存中不存在，创建该Cache<br /> else<br /> {<br /> //获取D:/.../App_Themes<br /> string themesDirPath = HttpContext.Current.Server.MapPath("~/App_Themes");</p> <p> //获取D:/.../App_Themes路径下包含D:/.../App_Themes/Default和D:/.../App_Themes/Yellow的数组<br /> string[] themes = System.IO.Directory.GetDirectories(themesDirPath);</p> <p> for(int i = 0; i <= themes.Length - 1; i++)<br /> {<br /> //获取路径文件名数组：Default，Yellow<br /> themes[i] = System.IO.Path.GetFileName(themes[i]);<br /> }</p> <p> //监视路径跟改自动移除Cache<br /> System.Web.Caching.CacheDependency dep = new System.Web.Caching.CacheDependency(themesDirPath);</p> <p> //创建名为"SiteThemes"，数据内容为Default，Yellow，监视路径为dep<br /> HttpContext.Current.Cache.Insert("SiteThemes", themes, dep);</p> <p> return themes;<br /> }<br /> }<br /> }

protected void Page_Load(object sender, EventArgs e)<br /> {<br /> if (ThemesSelect_Globals.ThemesSelectorID.Length == 0)<br /> {<br /> //将DropDownList的ID值付给自定义静态类ThemesSelect_Globals的属性<br /> ThemesSelect_Globals.ThemesSelectorID = this.DropDownList1.UniqueID;<br /> }</p> <p> //配置数据源，绑定数据<br /> this.DropDownList1.DataSource = Helpers.GetThemes();<br /> this.DropDownList1.DataBind();</p> <p> //设置DropDownList的选中项<br /> this.DropDownList1.SelectedValue = this.Page.Theme;<br /> }

/// <summary><br /> /// 页面自定义基类<br /> /// </summary><br /> public class BasePage:System.Web.UI.Page<br /> {<br /> //重定义事件<br /> protected override void OnPreInit(EventArgs e)<br /> {<br /> //获取自定义控件ThemesSelector的DropDownList的ID<br /> string id = ThemesSelect_Globals.ThemesSelectorID;</p> <p> //存在id<br /> if (id.Length > 0)<br /> {<br /> //如页面为回送并且表单中存在该id控件<br /> //所有包含服务器端表单页面都有一个名为EVENTTARGET的隐藏字段，其中包含触发回送的控件ID<br /> if (this.Request.Form["__EVENTTARGET"] == id && !string.IsNullOrEmpty(this.Request.Form[id]))<br /> {<br /> //重新设置当前页面主题<br /> this.Theme = this.Request.Form[id];<br /> //将当前选择主题保存在Session中<br /> this.Session["CurrentTheme"] = this.Theme;<br /> }<br /> //如页面非回送，读取保存在Session["CurrentTheme"]中的主题信息<br /> else<br /> {<br /> if(this.Session["CurrentTheme"] != null)<br /> {<br /> this.Theme = this.Session["CurrentTheme"].ToString();<br /> }<br /> }<br /> }</p> <p> base.OnPreInit(e);<br /> }<br /> }<br />