ASP.NET 2.0中的友好CSS控件适配器的应用 - 用ul、li呈现CheckBoxList和RadioButtonList

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ASP.NET 2.0中的友好CSS控件适配器的应用 - 用ul、li呈现CheckBoxList和RadioButtonList

作者：webabcd


介绍
控件适配器（Control Adapters）可以让你改变通过ASP.NET控件生成的HTML标记。http://www.asp.net/cssadapters/有详细的介绍和示例，但是没有用ul、li呈现CheckBoxList和RadioButtonList的例子（可能是因为太简单了，不屑去写），那就让我们来实现它吧，顺便熟悉一下如何开发控件适配器。


示例
App_Code/ControlAdaptersSample.cs

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls.Adapters;

/**//// <summary>
/// ControlAdaptersSample 的摘要说明
/// </summary>
public class ControlAdaptersSample : WebControlAdapter
{
    protected override void Render(HtmlTextWriter writer)
    {
        ListControl listControl = this.Control as ListControl;
        IRepeatInfoUser repeaterInfo = this.Control as IRepeatInfoUser;

        if (listControl == null || repeaterInfo == null)
        {
            base.Render(writer);

            return;
        }

        if (listControl.CssClass.Length > 0)
        {
            writer.AddAttribute("class", listControl.CssClass);
        }

        writer.RenderBeginTag(HtmlTextWriterTag.Ul);

        for (int i = 0; i < listControl.Items.Count; i++)
        {
            writer.RenderBeginTag(HtmlTextWriterTag.Li);
            repeaterInfo.RenderItem(ListItemType.Item, i, new RepeatInfo(), writer);
            writer.RenderEndTag();
        }

        writer.RenderEndTag();
    }
}

App_Browsers/ControlAdaptersSample.browser

<browsers>
  <browser refID="Default">
    <controlAdapters>
      <adapter controlType="System.Web.UI.WebControls.CheckBoxList"
         adapterType="ControlAdaptersSample" />
      <adapter controlType="System.Web.UI.WebControls.RadioButtonList"
         adapterType="ControlAdaptersSample" />
    </controlAdapters>
  </browser>
</browsers>

都有什么browsers可用呢？可以在如下的路径中找到

C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG\Browsers

ControlAdaptersSample.aspx

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="ControlAdaptersSample.aspx.cs"
    Inherits="Control_ControlAdaptersSample" Title="友好CSS控件适配器的简单示例" %>

<asp:Content ID="Content1" ContentPlaceHolderID="cph" runat="Server">
    <style>
        .ListControlCSS {}{ list-style:none; margin:0px; width: 400px; background-color: #CCC; }
        .ListControlCSS INPUT {}{ background-color: #CCC; }
        .ListControlCSS li{}{ float:left; width:100px; line-height:30px;}
    </style>
    <asp:CheckBoxList ID="cbl" runat="server" CssClass="ListControlCSS">
        <asp:ListItem Text="One" />
        <asp:ListItem Text="Two" />
        <asp:ListItem Text="Three" />
        <asp:ListItem Text="Four" />
        <asp:ListItem Text="Five" />
        <asp:ListItem Text="Six" />
        <asp:ListItem Text="Seven" />
        <asp:ListItem Text="Eight" />
        <asp:ListItem Text="Nine" />
        <asp:ListItem Text="Ten" />
    </asp:CheckBoxList>
    <div>
        &nbsp;</div>
    <asp:RadioButtonList ID="rbl" runat="server" CssClass="ListControlCSS">
        <asp:ListItem Text="One" />
        <asp:ListItem Text="Two" />
        <asp:ListItem Text="Three" />
        <asp:ListItem Text="Four" />
        <asp:ListItem Text="Five" />
        <asp:ListItem Text="Six" />
        <asp:ListItem Text="Seven" />
        <asp:ListItem Text="Eight" />
        <asp:ListItem Text="Nine" />
        <asp:ListItem Text="Ten" />
    </asp:RadioButtonList>
    <p>
        官网：<a href="http://www.asp.net/cssadapters/" target="_blank">http://www.asp.net/cssadapters/</a>
    </p>
</asp:Content>

运行结果
CheckBoxList和RadioButtonList将以ul、li呈现


OK
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