自定义RadioButtonList

RadioButtonList也是数据绑定控件，但是表现的形式远不及repeater，datagrid，datalist这些数据控件多。原因很简单他是radiobutton的列表么。；）但是在实际的工作中往往也需要来点花哨的如下图


今天超子简单写了一个实现上图效果的自定义radiobuttonlist控件，把代码贴出来，大家讨论讨论。
为了方便贴在网上，超子把用到的两个类写在一个文件里了。另外，横向布局的代码我没写，只写了纵向的。

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Globalization;

namespace Foto
{
    //->**************************************
    //-> CustomRadioButtonList Simple Sample *
    //->                                     *
    //->                        by Chaozi    *
    //->                        04/11/16     *
    //->**************************************
    public class MyRadioButtonList:RadioButtonList
    {
        -- 成员变量 --#region -- 成员变量 --
        private string alternatingItemCssClass;
        private string itemCssClass;
        #endregion

        -- 构造 --#region -- 构造 --
        public MyRadioButtonList()
        {
            
        }
        #endregion

        -- 属性 --#region -- 属性 --
        public string AlternatingItemCssClass
        {
            get{ return alternatingItemCssClass; }
            set{ alternatingItemCssClass = value;}
        }
        public string ItemCssClass
        {
            get{ return itemCssClass; }
            set{ itemCssClass = value;}
        }
        #endregion

        -- 重写呈现方法 --#region -- 重写呈现方法 --
        protected override void Render(HtmlTextWriter writer)
        {
            MyRepeatInfo info = new MyRepeatInfo();
            Style cStyle = (ControlStyleCreated ? ControlStyle : null);
            info.RepeatColumns = RepeatColumns;
            info.RenderRepeater(writer,this,cStyle,this,itemCssClass,alternatingItemCssClass);
        }

        #endregion
    }

    public class MyRepeatInfo
    {
        -- 成员变量 --#region -- 成员变量 --
        
        int    repeatColumns                = 0;
        RepeatDirection    direction        = RepeatDirection.Vertical;
 
        #endregion

        -- 构造 --#region -- 构造 --
        public MyRepeatInfo()
        {
            
        }
        #endregion

        -- 属性 --#region -- 属性 --
        public int RepeatColumns
        {
            get{ return repeatColumns; }
            set{ repeatColumns = value;}
        }
        public RepeatDirection Direction
        {
            get{ return direction; }
            set{ direction = value;}
        }
        #endregion

        -- 方法 --#region -- 方法 --
        public void RenderRepeater(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl)
        {
            RenderRepeater(writer,user,controlStyle,baseControl,null,null);
        }
        public void RenderRepeater(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl,string alternatingItemCssClass)
        {
            RenderRepeater(writer,user,controlStyle,baseControl,null,alternatingItemCssClass);
        }
        public void RenderRepeater(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl,string itemCssClass,string alternatingItemCssClass)
        {
            switch (direction)
            {
                case RepeatDirection.Horizontal:
                    RenderHorizontal(writer,user,controlStyle,baseControl,itemCssClass,alternatingItemCssClass);
                    break;
                case RepeatDirection.Vertical:
                    RenderVertical(writer,user,controlStyle,baseControl,itemCssClass,alternatingItemCssClass);
                    break;
            }
        }
        #endregion

        -- 辅助方法 --#region -- 辅助方法 --
        void RenderHorizontal(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl,string itemCssClass,string alternatingItemCssClass)
        {
            //水平
        }
        //->
        void RenderVertical(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl,string itemCssClass,string alternatingItemCssClass)
        {
            //垂直--  
            int total = user.RepeatedItemCount;
            int colsCount = repeatColumns;

            if(colsCount == 0)
                colsCount = 1;
            
            WebControl ctrl = new Table();

            ctrl.ID = baseControl.ClientID;
            ctrl.CopyBaseAttributes(baseControl);
            ctrl.ApplyStyle(controlStyle);

            string itemCss;

            ctrl.RenderBeginTag(writer);

            for ( int index = 0; index < total ; index ++)
            {
                if(index % colsCount == 0)
                {
                    if((index / colsCount) % 2 == 0)
                        itemCss = itemCssClass;
                    else
                        itemCss = alternatingItemCssClass;

                    writer.AddAttribute(HtmlTextWriterAttribute.Class,itemCss);
                    writer.RenderBeginTag(HtmlTextWriterTag.Tr);
                }
                writer.RenderBeginTag(HtmlTextWriterTag.Td);
                RepeatInfo info = new RepeatInfo();
                info.RepeatColumns = repeatColumns;
                user.RenderItem(ListItemType.Item,index,info,writer);
                writer.RenderEndTag();

                if(((index+1) % colsCount == 0) || (index+1 == total))
                    writer.RenderEndTag();
                
            }

            ctrl.RenderEndTag(writer);
            
        }
        #endregion
    }
}